CO-14, "Exploded View"
Contents
1. Limit 107 1 1 16 Leakage testing pressure 157 1 6 23 T h e r m ostat INFOID 0000000001547662 Thermostat Standard Valve opening temperature 76 5 C 170 F Maximum valve lift 9 0 mm 90 C 0 354 in 194 F Valve closing temperature Revision 2007 June CO 26 71 C 160 F G37 Coupe2. Vehicle front 5 Remove air relief plug 1 on heater hose 2 Heater hose lt m Vehicle front 6 Fill radiator and reservoir tank if removed to specified level e Pour engine coolant through engine coolant filler neck slowly of less than 2 2 1 8 US qt 1 3 4 Imp qt a minute to allow air in system to escape e Use Genuine NISSAN Long Life Antifreeze Coolant or equivalent mixed with water distilled or demineralized Refer to MA 10 Fluids and Lubricants Engine coolant capacity Refer to CO 26 With reservoir tank at Periodical Maintenanc MAX level e Specification sppiaaiezz Reservoir tank engine coolant capacity Refer to CO 26 At MAX level Periodical Maintenance Specification Revision 2007 June CO 9 G37 Coupe ENGINE COOLANT lt ON VEHICLE MAINTENANCE gt A MAN B MIN 7 When engine coolant overflows air relief hole on radiator install air relief plug with new O ring Tightening torque Refer to CO 14 Exploded View JPBIAO102ZZ 8 Repeat step 6 9 When engine coolant overflows air relief hole on heater hose install air relief plug with new O ring Then refill radiator with engine coolant e 1 2 N m 0 12 kg m 11 in Ib 10 Install air cleaner case LH Refer to EM 26 Exploded View 11 Install radiator cap 12 Warm up engine until opening thermostat Standard for warming up time is approximately 10 minutes at 3 000 rpm e Check thermostat opening condit
3. AS SCLIN an an a 8 Removal and Installation en 24 RT Tas HE 8 INSpECHON EE 25 ae eee eee eee eee eee TTT eee eee eee 9 SERVICE DATA AND SPECIFICATIONS USHING WEE 10 SDS E 26 PRADIAT OR ST T 12 SERVICE DATA AND SPECIFICATIONS RADIATOR Ate EE 12 NEES 26 RADIATOR CAP Inspection EE 12 Periodical Maintenance Specification Ph ehh eG A 26 Radiator eessen a E TA E E 26 RADIATOR ai itae e a a 12 RADIATOR INSp CtiOn o n 12 Blue 26 Revision 2007 June GO G37 Coupe DESCRIPTION lt FUNCTION DIAGNOSIS gt FUNCTION DIAGNOSIS DESCRIPTION E n d i n e Cool i n d Syste m INFOID 0000000001547691 To heater t To electric throttle control actuator From heater e t Cylinder block RH Cylinder block LH From electric throttle control actuator Cylinder head Oil cooler k 2 bank 2 Water pump Water inlet Cylinder head bank 1 Engine Cooling System Schematic INFOID 0000000001547892 Reservoir tank Thermostat Thermostat Ia Ir housing Water pump ys Cylinder block A Electric Oil cooler Heater throttle control Cylinder head actuator Closed Open Revision 2007 June CO 2 G37 Coupe OVERHEATING CAUSE ANALYSIS lt SYMPTOM DIAGNOSIS gt SYMPTOM DIAGNOSIS OVERHEATING CAUSE ANALYSIS Troubleshooting Chart Symptom INFOID 0000000001547690 Check items Poor heat transfer Water pump malfunctio
4. cover Refer to EM 24 Exploded View e Air cleaner case RH and LH Refer to EM 26 Exploded View e Reservoir tank Refer to CO 14 Exploded View e Radiator core support ornament radiator core support center and horn Refer to DLK 214 Exploded View e Hood lock Refer to DLK 211 HOOD LOCK CONTROL Exploded View 2 Remove condenser pipe assembly Refer to HA 49 Exploded View 3 Drain engine coolant from radiator Refer to CO 8 Draining CAUTION e Perform this step when the engine is cold e Never spill engine coolant on drive belts 4 Disconnect A T fluid cooler hoses from radiator A T models e Install blind plug to avoid leakage of A T fluid 5 Remove radiator hoses upper and lower and reservoir tank hose CAUTION Be careful not to allow engine coolant to contact drive belts 6 Remove cooling fan assembly Refer to CO 17 Exploded View CAUTION Never damage or scratch radiator amp condenser assembly core when removing 7 Rotate two radiator upper mount brackets 90 degrees in direc tion as shown in the figure and remove them 1 Radiator upper mount bracket A Turn 90 counterclockwise 8 Remove radiator amp condenser assembly as follows CAUTION Be careful not to damage radiator amp condenser assembly core a Lift up and pull the radiator amp condenser assembly 1 forward and then remove the mounting rubber lower 3 from the radia tor core support 2 SC Vehicle
5. into tensioner body hole B e The lever parts and the tab are synchronized Therefore the plunger will be secured under this condition JPBiaotiezz NOTE Figure shows the example of 1 2 mm 0 047 in diameter thin screwdriver being used as the stopper pin f Install timing chain tensioner primary e Remove dust and foreign material completely from backside of timing chain tensioner primary and from installation area of rear timing chain case g Remove stopper pin h Check again that timing chain and water pump sprocket are engaged 4 Install in the reverse order of removal for remaining parts e After starting engine let idle for three minutes then rev engine up to 3 000 rpm under no load to purge air from the high pressure chamber of chain tensioner Engine may produce a rattling noise This indicates that air still remains in the chamber and is not a matter of concern n spect i O n INFOID 0000000001547673 INSPECTION AFTER REMOVAL e Check for badly rusted or corroded water pump body assembly e Check for rough operation due to excessive end play e If anything is found replace water pump SLC943A INSPECTION AFTER INSTALLATION e Check that the reservoir tank cap is tightened e Check for leaks of engine coolant using the radiator cap tester adapter SST EG17650301 J33984 A and the radiator cap tester commercial service tool Refer to CO 8 Inspection e Start and warm up the engine Visually check tha
6. CE gt 2 Remove air relief plug 1 on heater hose 2 Heater hose lt Vehicle front 3 Remove air relief plug 2 on radiator 1 Reservoir tank 3 Engine cover lt Vehicle front JPBIAO260ZZ 4 Fill radiator with water until water spills from the air relief holes then close air relief plugs Fill radiator and reservoir tank with water and reinstall radiator cap Tightening torque Refer to CO 14 Exploded View Run the engine and warm it up to normal operating temperature Rev the engine two or three times under no load Stop the engine and wait until it cools down Drain water from the system Refer to CO 8 Draining Repeat steps 1 through 8 until clear water begins to drain from radiator 0 Check that the reservoir tank cap is tightened ON Ol Revision 2007 June CO 11 G37 Coupe RADIATOR lt ON VEHICLE MAINTENANCE gt RADIATOR RADIATOR CAP RADIATOR CAP Inspection INFOID 0000000001547684 e Check valve seat of radiator cap Check if valve seat is swollen to the extent that the edge of the plunger cannot be seen when watching it vertically from the top Check if valve seat has no soil and damage A Valve seat B Metal plunger JPBIA0108ZZ Pull negative pressure valve to open it and check that it close completely when released Check that there is no dirt or damage on the valve seat of radiator cap negative pressure valve Check that there are no unusualness in the openin
7. Clamp 17 Water hose 18 Water hose 19 Gasket 20 Heater pipe 21 Clamp 22 Water hose 23 Clamp 24 Heater hose 25 Water bypass pipe 26 O ring 27 Heater hose A To EVAP piping B To heater core C To radiator D To oil cooler E To electric throttle control actuator Refer to GI 4 Components for symbols in the figure Removal and Installation INFOID 0000000001547678 REMOVAL 1 Remove engine cover Refer to EM 24 Exploded View 2 Remove reservoir tank Refer to CO 14 Exploded View 3 Remove oil level gauge and guide Refer to EM 42 Exploded View 4 Remove air duct and air cleaner case assembly RH and LH Refer to EM 26 Exploded View 5 Remove engine undercover with power tool 6 Drain engine coolant from radiator drain plug at the bottom of radiator Refer to CO 8 Draining Revision 2007 June CO 24 G37 Coupe WATER OUTLET AND WATER PIPING lt ON VEHICLE REPAIR gt CAUTION e Perform this step when the engine is cold e Never spill engine coolant on drive belts 7 Remove radiator hose upper and heater hose Separate engine harness removing their bracket from water outlet rear 9 Remove engine coolant temperature sensor as necessary CAUTION Be careful not to damage engine coolant temperature sensor 10 Remove heater pipe water bypass pipe and water outlet pipe 11 Remove water outlet rear as necessary Gei NOTE Removing engine assembly is required Refer to EM 67 Exploded
8. ENGINE SECTION C O ENGINE COOLING SYSTEM FUNCTION DIAGNOSIS eene 2 ON VEHICLE REPAIR en 14 DESCRIPTION W CAN RADIATOR EE 14 Engine Cooling System ccccccesceseteeeteeeeeeees 2 Exploded AE 14 Engine Cooling System Schematic 0 0 e 2 Removal and Installation 0 eeceeeeeeesseeeeeeeeeaes 15 d i ee Le 16 SYMPTOM DIAGNOSIS ceeeeeseeeeteeeeenees 3 COOLING FAN 055 ccssovecceecisacrssanczconetasiarccnasesctaivess 17 OVERHEATING CAUSE ANALYSIS 00 3 Exploded Meuse 17 Troubleshooting 007s q EE 3 Removal and Installation cccccccccccccccecceceecevences 17 Disassembly and Assembly ccceeeeeeenteeeeeeeneees 17 PRECAUTION Ee E NEPER aaant erin aN TnS A ERARIS 18 PRECAUTIONS csccccccsssseseesnsseseeseenssenseeeseseees 5 WATER BUMP rreren rmana 19 Precaution for Supplemental Restraint System Exploded VieW cccccceceeeeceeeeeeeeceeeeeeeeeseeneeeeeneeeees 19 SRS AIR BAG and SEAT BELT PRE TEN Removal and Installation 19 SIONER DEE Ee 5 INSPOCtION aerar niara th T AE EET AON 21 Liquid Gasket sssseseeseseesssrnssnernssrressressrrnssrns 5 WATER INLET AND THERMOSTAT ASSEM PREPARATION EE E GE 22 PREPARATION ENEE 7 Exploded View wu Nees 22 Commercial Service Tools s 7 eae Hee S ON VEHICLE MAINTENANCE 8 WATER OUTLET AND WATER PIPING Ss ENGINE COOLANT cecccccccccccccccecececccccccccesesseeceees 8 Exploded View BEE 24
9. FINITI dealer Improper maintenance including incorrect removal and installation of the SRS can lead to personal injury caused by unintentional activation of the system For removal of Spiral Cable and Air Bag Module see the SRS AIRBAG Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this Service Manual SRS wiring harnesses can be identified by yellow and or orange harnesses or har ness connectors Liq u id G asket INFOID 0000000001547689 REMOVAL OF LIQUID GASKET SEALING e After removing mounting nuts and bolts separate the mating sur face using the seal cutter SST KV10111100 J37228 A and remove old liquid gasket sealing CAUTION Be careful not to damage the mating surfaces Tap B the seal cutter SST KV10111100 J37228 to insert it and then slide C it by tapping on the side as shown in the figure In areas where seal cutter SST KV10111100 J38228 is difficult to use use a plastic hammer to lightly tap the parts to remove it CAUTION If for some unavoidable reason tool such as a screwdriver is used be careful not to damage the mating surfaces LIQUID GASKET APPLICATION PROCEDURE 1 Using a scraper A remove old liquid gasket adhering to the liq uid gasket application surface and the mating surface e Remove liquid gasket completely from the groove of the liquid gasket application surface mounting bolts and bolt holes 2 Wipe the liquid gasket app
10. View INSTALLATION Note the following and install in the reverse order of removal e Securely insert each hose and install clamp at a position where it does not interfere with the pipe bulge e When inserting water outlet pipe and water bypass pipe into water outlet apply neutral detergent to O ring CAUTION Never allow water outlet rear to nip O rings when installing water outlet pipe and water bypass pipe n S p e ct i O n INFOID 0000000001547679 INSPECTION AFTER INSTALLATION e Check that the reservoir tank cap is tightened e Check for leaks of engine coolant using the radiator cap tester adapter SST EG17650301 J33984 A and the radiator cap tester commercial service tool Refer to CO 8 Inspection e Start and warm up the engine Visually check that there is no leaks of engine coolant Revision 2007 June CO 25 G37 Coupe lt SERVICE DATA AND SPECIFICATIONS SDS SERVICE DATA AND SPECIFICATIONS SDS SERVICE DATA AND SPECIFICATIONS SDS Periodical Maintenance Specification ENGINE COOLANT CAPACITY APPROXIMATE Engine coolant capacity With reservoir tank MAX level SERVICE DATA AND SPECIFICATIONS SDS INFOID 0000000001547660 Unit US qt Imp qt 9 0 9 1 2 7 7 8 Reservoir tank engine coolant capacity At MAX level Radiator 0 8 7 8 3 4 INFOID 0000000001547661 Unit kPa kg cm psi Standard 122 3 151 7 1 2 1 5 18 22 Cap relief pressure
11. engine coolant when the engine is hot e Wrap a thick cloth around radiator cap and carefully remove radiator cap First turn radiator cap a quarter of a turn to release built up pressure Then turn radiator cap all the way 1 Open radiator drain plug 2 at the bottom of radiator and then remove radiator cap 1 Engine under cover A Radiator drain plug hole lt m Vehicle front JPBIAO259ZZ When draining all of engine coolant in the system open water drain plugs on cylinder block Refer to EM 72 Setting 2 Remove reservoir tank as necessary and drain engine coolant and clean reservoir tank before installing Revision 2007 June CO 8 G37 Coupe ENGINE COOLANT lt ON VEHICLE MAINTENANCE gt 3 Check drained engine coolant for contaminants such as rust corrosion or discoloration If contaminated flush the engine cooling system Refer to CO 10 Flushing Refi i n d INFOID 0000000001547682 CO 1 Remove air cleaner case LH Refer to EM 26 Exploded View 2 Install reservoir tank if removed and radiator drain plug CAUTION Be sure to clean drain plug and install with new O ring Tightening torque Refer to CO 14 Exploded View If water drain plugs on cylinder block are removed close and tighten them Refer to EM 110 Exploded View 3 Check that each hose clamp has been firmly tightened 4 Remove air relief plug 2 on radiator left side 1 Reservoir tank 2 Engine cover lt m
12. front Revision 2007 June CO 15 G37 Coupe JPBIAO106ZZ RADIATOR lt ON VEHICLE REPAIR gt b Remove radiator amp condenser assembly 1 from front of radia tor core support 2 sl Vehicle front JPBIAO107ZZ INSTALLATION Installation is the reverse order of removal n S pect i O n INFOID 0000000001547665 INSPECTION AFTER INSTALLATION e Check that the reservoir tank cap is tightened e Check for leaks of engine coolant using the radiator cap tester adapter SST EG17650301 J33984 A and the radiator cap tester commercial service tool Refer to CO 8 Inspection e Start and warm up the engine Visually check that there is no leaks of engine coolant and A T fluid A T mod els Revision 2007 June CO 16 G37 Coupe COOLING FAN lt ON VEHICLE REPAIR gt COOLING FAN Exp loded View INFOID 0000000001547666 SEC 214 GEN s A SIR wg d h al IN es Tt e A ZE 1 Cooling fan RH 2 Cooling fan LH 3 Fan shroud 4 Fan motor LH 5 Fan motor RH 6 Cooling fan control module A Apply on fan motor shaft PO Apply Genuine High Strength Lock ing Sealant or equivalent Refer to Gl 4 Components for symbols in the figure Re moval and Installation INFOID 0000000001547667 REMOVAL 1 Remove reservoir tank Refer to CO 14 Exploded View 2 Remove air cleaner case LH Refer to EM 26 Exploded View 3 Disconnect harness connector from cooling fan control module and move harnes
13. g and closing conditions of negative pressure valve SMA967B Check radiator cap relief pressure Standard and limit Refer to CO 26 Radiator When connecting radiator cap to the radiator cap tester and the radiator cap tester adapter commercial service tool A apply engine coolant to the cap seal surface JPBIA0109ZZ e Replace radiator cap if there is an unusualness related to the above three CAUTION When installing radiator cap thoroughly wipe out the water outlet front filler neck to remove any waxy residue or foreign material RADIATOR RA D IATO R n spect i O n INFOID 0000000001547685 Check radiator for mud or clogging If necessary clean radiator as follows e Be careful not to bend or damage radiator fins e When radiator is cleaned without removal remove all surrounding parts such as radiator cooling fan assem bly and horns Then tape harness and connectors to prevent water from entering 1 Apply water by hose to the back side of the radiator core vertically downward 2 Apply water again to all radiator core surfaces once per minute 3 Stop washing if any stains no longer flow out from radiator 4 Blow air into the back side of radiator core vertically downward Revision 2007 June CO 12 G37 Coupe RADIATOR lt ON VEHICLE MAINTENANCE gt e Use compressed air lower than 490 kPa 5 kg cm 71 psi and keep distance more than 30 cm 11 8 in 5 Blow air again into all the radiator c
14. heels and tires Dragging brakes Improper ignition timing Blocked or restricted air flow Revision 2007 June Blocked bumper Blocked radiator grille Installed car brassiere Mud contamination or paper clogging Blocked radiator Blocked condenser Installed large fog lamp CO 4 Blocked air flow G37 Coupe PRECAUTIONS lt PRECAUTION gt PRECAUTION PRECAUTIONS Precaution for Supplemental Restraint System SRS AIR BAG and SEAT BELT P R E T E N S O N E R INFOID 0000000001547688 The Supplemental Restraint System such as AIR BAG and SEAT BELT PRE TENSIONER used along with a front seat belt helps to reduce the risk or severity of injury to the driver and front passenger for certain types of collision This system includes seat belt switch inputs and dual stage front air bag modules The SRS system uses the seat belt switches to determine the front air bag deployment and may only deploy one front air bag depending on the severity of a collision and whether the front occupants are belted or unbelted Information necessary to service the system safely is included in the SRS AIRBAG and SEAT BELT of this Service Manual WARNING e To avoid rendering the SRS inoperative which could increase the risk of personal injury or death in the event of a collision which would result in air bag inflation all maintenance must be performed by an authorized NISSAN IN
15. ion by touching radiator hose lower to see a flow of warm water CAUTION Watch water temperature gauge so as not to overheat engine 13 Stop the engine and cool down to less than approximately 50 C 122 F e Cool down using fan to reduce the time e If necessary refill radiator up to filler neck with engine coolant 14 Refill reservoir tank to MAX level line with engine coolant 15 Repeat steps 11 through 14 two or more times with radiator cap installed until engine coolant level no longer drops 16 Check cooling system for leaks with engine running 17 Warm up the engine and check for sound of engine coolant flow while running engine from idle up to 3 000 rpm with heater temperature controller set at several position between COOL and WARM e Sound may be noticeable at heater unit 18 Repeat step 17 three times 19 If sound is heard bleed air from cooling system by repeating step 6 and steps from 11 to 18 until engine coolant level no longer drops 20 Check that the reservoir tank cap is tightened Fl u S h i n d INFOID 0000000001547683 1 Install reservoir tank if removed and radiator drain plug CAUTION Be sure to clean drain plug and install with new O ring Tightening torque Refer to CO 14 Exploded View lf water drain plugs on cylinder block are removed close and tighten them Refer to EM 110 Exploded View Revision 2007 June CO 10 G37 Coupe ENGINE COOLANT lt ON VEHICLE MAINTENAN
16. ket S NT052 Power tool Loosening nuts and bolts PBICO190E Radiator cap tester Checking radiator and radiator cap PBIC1982E Radiator cap tester adapter Adapting radiator cap tester to radiator cap and water outlet front filler neck a 28 1 10 dia cS 4 b 31 4 1 236 dia a dE c 41 3 1 626 dia XY amp oti ints Unit mm in S NT564 Revision 2007 June CO 7 G37 Coupe ENGINE COOLANT lt ON VEHICLE MAINTENANCE gt ON VEHICLE MAINTENANCE ENGINE COOLANT n S pect i O n INFOID 0000000001547680 LEVEL e Check if the reservoir tank engine coolant level is within the MIN to MAX when the engine is cool A MAX B MIN e Adjust the engine coolant level as necessary e Check that the reservoir tank cap is tightened JPBIA0102ZZ LEAKAGE e To check for leaks apply pressure to the cooling system with the radiator cap tester and radiator cap tester adapter commercial service tool A Testing pressure Refer to CO 26 Radiator WARNING Never remove radiator cap when engine is hot Serious burns could occur from high pressure engine coolant escaping from radiator CAUTION Higher test pressure than specified may cause radiator dam JPBIA0411ZZ age NOTE In a case that engine coolant decreases replenish radiator with engine coolant If anything is found repair or replace damaged parts D ral n l n d INFOID 0000000001547681 WARNING e To avoid being scalded never change
17. lication surface and the mating sur face with white gasoline lighting and heating use to remove adhering moisture grease and foreign materials JPBIA0052ZZ JPBIA0053ZZ Revision 2007 June CO 5 G37 Coupe PRECAUTIONS lt PRECAUTION gt 3 Attach liquid gasket tube to the tube presser commercial ser vice tool Use Genuine RTV Silicone Sealant or equivalent Refer to GI 15 Recommended Chemical Products and Sealants 4 Apply liquid gasket without breaks to the specified location with the specified dimensions e If there is a groove for the liquid gasket application apply liq uid gasket to the groove e As for the bolt holes B normally apply liquid gasket inside the holes Occasionally it should be applied outside the holes Make sure to read the text of service manual A Groove lt Inside e Within five minutes of liquid gasket application install the mat ing component e If liquid gasket protrudes wipe it off immediately e Do not retighten after mounting bolts and nuts the installation e After 30 minutes or more have passed from the installation fill engine oil and engine coolant CAUTION If there are specific instructions in this manual observe them JPBIA0010ZZ Revision 2007 June CO 6 G37 Coupe PREPARATION lt PREPARATION gt PREPARATION Commercial Service Tools E Tool name Description Tube presser Pressing the tube of liquid gas
18. n Worn or loose drive belt Thermostat stuck closed Damaged fins Dust contamination or pa per clogging Physical damage Clogged radiator cooling tube Excess foreign material rust dirt sand etc Reduced air flow Cooling fan does not oper ate High resistance to fan rota tion Damaged fan blades Fan assembly Damaged radiator shroud Improper engine coolant Cooling sys mixture ratio a tem parts l malfunction Poor engine coolant quality Engine coolant density Insufficient engine coolant Revision 2007 June Engine coolant leaks f Loose clamp Cooling hose Cracked hose Water pump Poor sealing Loose Radiator cap Poor sealing Radiator O ring for damage deterio ration or improper fitting Cracked radiator tank Cracked radiator core Reservoir tank Cracked reservoir tank Overflowing reservoir tank CO 3 Exhaust gas leaks into cool ing system Cylinder head deterioration Cylinder head gasket deteri oration G37 Coupe OVERHEATING CAUSE ANALYSIS lt SYMPTOM DIAGNOSIS gt Symptom Check items Except cool ing system parts mal function Overload on engine Abusive driving High engine rpm under no load Driving in low gear for ex tended time Driving at extremely high speed Powertrain system malfunc tion Installed improper size w
19. ng Fan Inspect cooling fan for crack or unusual bend e If anything is found replace cooling fan Revision 2007 June CO 18 G37 Coupe WATER PUMP lt ON VEHICLE REPAIR gt WATER PUMP Exp loded View INFOID 0000000001547671 SEC 130 135 210 fg 8 1 0 83 72 1 Timing chain tensioner primary 2 Water pump 3 O ring 4 O ring Identify with light blue paint mark Apply engine coolant Refer to Gl 4 Components for symbols in the figure A Identify with yellow paint mark Removal and Installation INFOID 0000000001547672 CAUTION e When removing water pump assembly be careful not to get engine coolant on drive belts e Water pump cannot be disassembled and should be replaced as a unit e After installing water pump connect hose and clamp securely then check for leaks using the radia tor cap tester commercial service tool and the radiator cap tester adapter SST EG17650301 J33984 A REMOVAL Remove engine cover Refer toEM 24 Exploded View Release the fuel pressure Refer to EC 601 Inspection Disconnect the battery cable from the negative terminal Remove air duct and air cleaner case assembly RH and LH Refer to EM 26 Exploded View Remove reservoir tank Refer to CO 14 Exploded View Separate engine harness removing their brackets from front timing chain case Remove engine undercover with power tool Drain engine oil Refer to LU 7 Draining CAUTION e Perform this step
20. not to spill engine coolant over engine room Use rag to absorb engine coolant Revision 2007 June CO 22 G37 Coupe WATER INLET AND THERMOSTAT ASSEMBLY lt ON VEHICLE REPAIR gt Inspection INFOID 0000000001547676 INSPECTION AFTER REMOVAL 1 Check valve seating condition at ordinary room temperatures It should seat tightly 2 Check valve operation Thermostat Standard Refer to CO 26 Thermostat e If the malfunctioning condition when valve seating at ordinary room temperature or measured values are out of the standard replace water inlet and thermostat assembly SLC949A INSPECTION AFTER INSTALLATION e Check that the reservoir tank cap is tightened e Check for leaks of engine coolant using the radiator cap tester adapter SST EG17650301 J33984 A and the radiator cap tester commercial service tool Refer to CO 8 Inspection e Start and warm up the engine Visually check that there is no leaks of engine coolant Revision 2007 June CO 23 G37 Coupe WATER OUTLET AND WATER PIPING lt ON VEHICLE REPAIR gt WATER OUTLET AND WATER PIPING Exp loded View INFOID 0000000001547677 SEC 210 211 253 5 0 0 51 44 JPBIA1200GB 1 Clamp 2 Water hose 3 Harness bracket 4 Water outlet rear 5 Heater hose 6 Gasket 7 Washer 8 Engine coolant temperature sensor 9 O ring 10 Water outlet pipe 11 Water outlet front 12 Clamp 13 Radiator hose upper 14 Gasket 15 Water pipe 16
21. ore surfaces once per minute until no water sprays out Revision 2007 June CO 13 G37 Coupe RADIATOR lt ON VEHICLE REPAIR gt ON VEHICLE REPAIR RADIATOR Exploded View SEC 214 1 Upper mount bracket 2 Mounting rubber upper 4 Condenser pipe assembly 5 O ring 7 Clamp 8 AT fluid cooler hose A T models 10 Mounting rubber lower 11 Clamp 13 Radiator hose Upper 14 Water drain hose 16 O ring 17 Radiator water inlet pipe 19 O ring 20 Air relief plug 22 Reservoir tank 23 Reservoir tank hose 25 Reservoir tank hose 26 Grommet A To transmission B To water inlet D Refer to HA 49 Refer to Gl 4 Components for symbols in the figure Revision 2007 June CO 14 INFOID 0000000001547663 JPBIAO246GB Radiator amp condenser assembly O ring A T fluid cooler hose A T models Radiator hose lower Drain plug O ring Reservoir tank cap Clamp Radiator cooling fan assembly To water outlet G37 Coupe RADIATOR lt ON VEHICLE REPAIR gt Re moval and n stal ati O n INFOID 0000000001547664 REMOVAL WARNING Never remove radiator cap when engine is hot Serious burns could occur from high pressure engine coolant escaping from radiator Wrap a thick cloth around the cap Slowly turn it a quarter of a turn to release built up pressure Carefully remove radiator cap by turning it all the way 1 Remove the following parts e Engine under cover with power tool e Engine
22. rn and pull out water pump 1 CAUTION e Pull straight out while preventing vane from contacting socket in installation area e Remove water pump without causing sprocket to contact timing chain c Remove M8 bolts and O rings from water pump CAUTION JPBIAO111ZZ Never disassemble water pump INSTALLATION 1 Install new O rings to water pump e Apply engine oil to O ring 1 and engine coolant to O ring 3 as shown in the figure 2 Water pump e Locate O ring with yellow paint mark A to front side e Locate O ring with light blue paint mark B to rear side 2 Install water pump CAUTION Never allow cylinder block to nip O rings when installing water pump e Check timing chain and water pump sprocket are engaged e Insert water pump by tightening mounting bolts alternately and evenly 3 Install timing chain tensioner primary as follows a Turn crankshaft clockwise so that timing chain on the timing chain tensioner primary side is loose Revision 2007 June CO 20 G37 Coupe WATER PUMP lt ON VEHICLE REPAIR gt b Pull plunger stopper tab A up or turn lever downward so as to remove plunger stopper tab from the ratchet of plunger D NOTE Plunger stopper tab and lever C are synchronized c Push plunger into the inside of tensioner body d Hold plunger in the fully compressed position by engaging plunger stopper tab with the tip of ratchet e To secure lever insert stopper pin E through hole of lever
23. s to aside 4 Remove engine under cover with power tool 5 Remove cooling fan assembly from under the vehicle CAUTION Be careful not to damage or scratch on radiator core INSTALLATION Note the following and install in the reverse order of removal CAUTION Only use genuine parts for cooling fan mounting bolt and observe the specified torque to prevent radiator from being damaged Disassembly and Assembly InFo10 0000000001547669 DISASSEMBLY 1 Disconnect harness from cooling fan control module 2 Remove cooling fan control module from cooling fan assembly CAUTION Handle carefully to avoid dropping and shocks 3 Remove cooling fan mounting nuts and then remove the cooling fan RH and LH 4 Remove fan motors RH and LH CO 17 G37 Coupe Revision 2007 June COOLING FAN lt ON VEHICLE REPAIR gt ASSEMBLY Note the following and assemble in the reverse order of disassembly CAUTION RH and LH cooling fans are different Be careful not to misassemble them e Install each fan in the following position Right side 9 blades Left side 11 blades e Secure the harness tightly to the fan shroud to prevent the fan rotation area from being loose n spect i O n INFOID 0000000001547670 INSPECTION AFTER REMOVAL Check that fan motors operate normally NOTE Cooling fans are controlled by cooling fan control module For details refer to EC 73 Component Parts Loca tion INSPECTION AFTER DISASSEMBLY Cooli
24. t there is no leaks of engine coolant Revision 2007 June CO 21 G37 Coupe WATER INLET AND THERMOSTAT ASSEMBLY lt ON VEHICLE REPAIR gt WATER INLET AND THERMOSTAT ASSEMBLY Exp loded View INFOID 000000000 1547674 SEC 2109211 JPBIA1201GB 1 Gasket 2 Water inlet and thermostat assembly Refer to GI 4 Components for symbols in the figure Re m oval a nd n stal lat i O n INFOID 0000000001547675 REMOVAL 1 Remove engine cover Refer to EM 24 Exploded View 2 Remove air duct and air cleaner case assembly LH Refer to EM 26 Exploded View 3 Remove reservoir tank Refer to CO 14 Exploded View 4 See oil cooler water pipe mounting bolt and move aside water pipe Refer to LU 10 Exploded jew Remove engine undercover with power tool 6 Drain engine coolant from radiator drain plug at the bottom of radiator Refer to CO 8 Draining CAUTION e Perform this step when the engine is cold e Never spill engine coolant on drive belts 7 Disconnect radiator hose lower 8 Disconnect intake valve timing control valve harness connector LH and remove intake valve timing con trol solenoid 9 Remove water inlet and thermostat assembly 1 CAUTION Never disassemble water inlet and thermostat assembly Replace them as a unit if necessary Gell A Do not loosen these screw JPBIA0261ZZ INSTALLATION Note the following and install in the reverse order of removal e Be careful
25. when the engine is cold e Never spill engine oil on drive belts 9 Drain engine coolant from radiator Refer to CO 8 Draining CAUTION e Perform this step when the engine is cold e Never spill engine coolant on drive belts 10 Remove cooling fan assembly Refer to CO 17 Exploded View 11 Remove radiator hose upper and lower Refer to CO 14 Exploded View 12 Remove front timing chain case Refer to EM 48 Exploded View 13 Remove timing chain tensioner primary as follows Ort oD Sie ON Revision 2007 June CO 19 G37 Coupe WATER PUMP lt ON VEHICLE REPAIR gt a Remove lower mounting bolt 1 b Loosen upper mounting bolt 2 slowly and then turn chain ten sioner primary 3 on the upper mounting bolt so that plunger 4 is fully expanded NOTE Even if plunger is fully expanded it is not dropped from the body of timing chain tensioner primary JPBIAO085ZZ c Remove upper mounting bolt and then remove timing chain tensioner primary 14 Remove water pump as follows a Remove three water pump mounting bolts Secure a gap between water pump gear and timing chain by turning crankshaft counterclockwise until timing chain looseness on water pump sprocket becomes maxi mum b Screw M8 bolts A pitch 1 25 mm 0 049 in length approx 50 mm 1 97 in into water pumps upper and lower mounting bolt holes until they reach timing chain case Then alternately tighten each bolt for a half tu
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