2001 impreza service manual quick reference index
Contents
1. G6M0087 2 Carbon fouled Dry fluffy carbon deposits on insulator and elec trode are mostly caused by slow speed driving in city weak ignition too rich fuel mixture dirty air cleaner etc It is advisable to replace with plugs having hotter heat range G6MO0088 IG SOHC 6 SPARK PLUG 3 Oil fouled Wet black deposits show excessive oil entrance into combustion chamber through worn rings and pistons or excessive clearance between valve guides and stems If same condition remains after repair use a hotter plug G6MO0089 4 Overheating White or light gray insulator with black or gray brown spots and bluish burnt electrodes indicate engine overheating Moreover the appearance re sults from incorrect ignition timing loose spark plugs wrong selection of fuel hotter range plug etc It is advisable to replace with plugs having colder heat range G6MO0090 D CLEANING Clean spark plugs in a sand blast type cleaner Avoid excessive blasting Clean and remove car bon or oxide deposits but do not wear away porce lain If deposits are too stubborn replace plugs IGNITION E ADJUSTMENT Correct it if the spark plug gap is measured with a gap gauge and it is necessary Spark plug gap L 1 0 1 1 mm 0 039 0 043 in L dh A p eae er S6M0412A NOTE Replae with new spark plug if this area is2. Spark Plug d EE 10 GENERAL DESCRIPTION IGNITION 1 General Description A SPECIFICATIONS Item Designation 1600cc CM12 100C 2000cc FH0137 1600cc HITACHI 2000cc DIAMOND 1600cc 0 7 Q410 2000cc 0 73 Q410 Secondary coil resis 1600cc 13 0 kQ 20 tance 2000cc 12 8 kQ 15 Insulation resistance between primary More than 10 MQ terminal and case Manufacturer Ignition coil and ignitor Primary coil resistance assembly RC8YC4 Alternate BKR6E 11 RC10YC4 Alternate BKR5E 11 Thread size 14 P 1 25 Spark gap i 1 0 1 1 0 039 0 043 1600cc Type and manufacturer Spark plug 2000cc IG SOHC 2 GENERAL DESCRIPTION IGNITION B COMPONENT 1 1600CC MODEL EN1039 1 Spark plug 4 Spark plug cord 2 4 Tightening torque N m kgf m ft lb 2 Spark plug cord 1 3 T1 6 4 0 65 4 7 3 Ignition coil and ignitor ASSY T2 21 2 1 15 2 IG SOHC 3 GENERAL DESCRIPTION IGNITION 2 2000CC MODEL S6M0329B 1 Spark plug 4 2 Spark plug cord 1 3 3 Ignition coil and ignitor ASSY C CAUTION e Wear working clothing including a cap protec tive goggles and protective shoes during opera tion e Remove contamination including dirt and corro sion before removal installation or disassembly e Keep the disassembled parts in order and pro tect them from dust or dirt e Before removal in
3. 2001 IMPREZA SERVICE MANUAL QUICK REFERENCE INDEX ENGINE 1 SECTION FUEL INJECTION FUEL SYSTEMS FU SOHC EMISSION CONTROL EC SOHC AUX EMISSION CONTROL DEVICES INTAKE INDUCTION IN SOHC MECHANICAL ME SOHC This service manual has been prepared to provide SUBARU service personnel with the necessary information and data for the correct maintenance and repair of SUBARU vehicles COOLING co This manual includes the procedures for maintenance disassembling reas sembling inspection and adjustment of LUBRICATION LU components and diagnostics for guid ance of experienced mechanics Please peruse and utilize this manual SPEED CONTROL SYSTEMS SP fully to ensure complete repair work for satisfying our customers by keeping their vehicle in optimum condition IGNITION leie When replacement of parts during repair work is needed be sure to use SUBARU genuine parts STARTING CHARGING SYSTEMS sc EXHAUST 610 5 0 ENGINE DIAGNOSTICS EN SOHC All information illustration and specifi cations contained in this manual are based on the latest product information available at the time of publication approval FUJI HEAVY INDUSTRIES LTD G1830GE2 H IGNITION IG SOHC dent aa Page General Description eiyscccaceistereatsesetkenndaghsdendecs seswedaieiaessdbiesseusamtaersenatetaaters 2 SOAS PMU EE 5 Ignition Coil and Ignitor Assembly e cece cece eeeeeneeeeeeeeeeeeeeeeeeeeeeeneeeees 8
4. o bolts which hold the washer tank then take the tank away from the working ar ea AN EN p ANS 5 Remove spark plugs cord by pulling boot not cord itself B2M4287 IG SOHC 5 SPARK PLUG IGNITION 6 Remove spark plug with the spark plugs socket B2M4288 B INSTALLATION 1 RH SIDE 1 Install in the reverse order of removal Tightening torque Spark plug 20 6 N m 2 10 kgf m 15 2 ft lb CAUTION The above torque should be only applied to new spark plugs without oil on their threads In case their threads are lubricated the torque should be reduced by approximately 1 3 of the specified torque in order to avoid over stress ing 2 LH SIDE 1 Install in the reverse order of removal Tightening torque Spark plug 20 6 N m 2 10 kgf m 15 2 ft lb CAUTION The above torque should be only applied to new spark plugs without oil on their threads In case their threads are lubricated the torque should be reduced by approximately 1 3 of the specified torque in order to avoid over stress ing C INSPECTION Check electrodes and inner and outer porcelain of plugs noting the type of deposits and the degree of electrode erosion S6M0420A A Electrode gap B Carbon accumulation or wear C Cracks D Damage E Damaged gasket 1 Normal Brown to grayish tan deposits and slight electrode wear indicate correct spark plug heat range
5. pecified resistance Primary side Between terminal No 1 and No 2 0 73 Q 10 Between terminal No 2 and No 4 0 73 Q 10 4 3 2 1 EN1041 Secondary side Between A and B 12 8 kQ 15 Between C and D 12 8 kQ 15 EN1043 3 Insulation between primary terminal and case 10 MQ or more IG SOHC 9 SPARK PLUG CORD IGNITION 4 Spark Plug Cord A INSPECTION Check for 1 Damage to cords deformation burning or rust formation of terminals 2 Resistance values of cords Resistance value 1 cord 5 6 10 6 2 cord 7 3 13 7 3 cord 5 9 11 1 4 cord 7 3 13 7 S6M0337 IG SOHC 10
6. stallation or disassembly be sure to Clarify the failure Avoid unnecessary re moval installation disassembly and replacement Spark plug cord 2 4 Tightening torque Nom kgf m ft lb T1 21 2 1 15 T2 6 4 0 65 4 7 e Be careful not to burn your hands because each part on the vehicle is hot after running e Be sure to tighten fasteners including bolts and nuts to the specified torque e Place shop jacks or safety stands at the specified points e Before disconnecting electrical connectors of sensors or units be sure to disconnect negative terminal from battery IG SOHC 4 SPARK PLUG 2 Spark Plug A REMOVAL CAUTION All spark plugs installed on an engine must be of the same heat range Spark plug CHAMPION RC8YC4 NGK BKR6E 11 Alternate CHAMPION RC10YC4 NGK BKR5E 11 Alternate 1 RH SIDE 1 Disconnect battery ground cable i 1600cc 2000cc 8 ES Es G6M0095 2 Remove air intake duct lt Ref to IN SOHC 8 REMOVAL Resonator Chamber gt 1 Remove resonator chamber lt Ref to IN SOHC gt 3 Remove spark plug cords by pulling boot not cord itself B2M4286 IGNITION 2 LH SIDE 1 Disconnect battery ground cable G6MO0095 2 Disconnect washer motor connector B6M0562B 3 Disconnect rear window glass washer hose from washer motor then plug connection with a suitable cap 4 Remove the tw
7. worn to ball shape IG SOHC 7 IGNITION COIL AND IGNITOR ASSEMBLY IGNITION 3 Ignition Coil and Ignitor As sembly A REMOVAL 1 Disconnect battery ground cable a Ze FS gemoogs 2 Disconnect spark plug cords from ignition coil and ignitor assembly e 1600cc MODEL EN1040 S6M0373 3 Disconnect connector from ignition coil and igni tor assembly 4 Remove ignition coil and ignitor assembly e 1600cc MODEL P B6M0930 B INSTALLATION 1 Install in the reverse order of removal Tightening torque 6 4 N m 0 65 kgf m 4 7 ft lb CAUTION Be sure to connect wires to their proper posi tions Failure to do so will damage unit e 1600cc MODEL 4 B6M0930 IG SOHC 8 IGNITION COIL AND IGNITOR ASSEMBLY C INSPECTION Using accurate tester inspect the following items and replace if defective 1 Primary resistance 2 Secondary coil resistance CAUTION If the resistance is extremely low this indicates the presence of a short circuit Specified resistance 1600cc Primary side Between terminal No 1 and No 4 0 7 2410 Between terminal No 1 and No 2 0 7 Q 10 4 3 2 1 EN1041 Secondary side Between A and B 13 0 kQ 20 Between C and D 13 0 kQ4 20 O ei EN1042 IGNITION S
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