TRU-TIME ADJUSTABLE CAM GEAR
Contents
1. PERFORMANCE ELECTRONICS TRU TIME ADJUSTABLE CAM GEAR Part Number 23 801BK amp 23 802BK WARNING This installation is not for the mechanically challenged If you are not mechanically inclined or do not understand the procedure please do not attempt the installation Refer the installation to a reputable mechanic It is highly recommended to m purchase the factory service manual to use as a guide along with these instruction sheets Legal in California only for racing vehicles which may never be used upon a public highway 2011 Advanced Engine Management Inc AEM Performance Electronics 2205 W 126 Street Unit A Hawthorne CA 90250 Phone 310 484 2322 Fax 310 484 0152 http www aemelectronics com Instruction Part Number 10 7031 Rev C You have just purchased the BEST adjustable cam sprockets available These AEM billet aluminum adjustable cam gears are CNC machined from billet aluminum and then laser etched with cam timing marks for adjustment up to 10 at the cam or 20 at the crankshaft Using the vernier scale on the sprocket hub helps to do the cam timing changes quickly and accurately The inner hub is anodized for lasting beauty and resistance to corrosion The out gear sector is hard anodized for resistance to wear We have found that there are significant power gains to be made by adjusting the cam timing even with stock cams and compression Adjustable cam sprockets are usually required in app2. 15 Ib ft Note If the head has been milled take extreme caution when retarding the cam timing There must be a minimum clearance of 0 06 between the piston and the valve d The cam timing directly affects the ignition timing in your vehicle Once the adjustment of the cam gear has been made you must reset the ignition timing back to the original location e After changing the cam timing perform a dyno run If the results are positive then proceed further in the direction of the timing change If the performance decreased then adjust the cam timing in the opposite direction Repeat this step until the optimum setting is found for your vehicle Apply Locite Red or other suitable thread locking compound to the threads of the cam gear bolts Torque the bolts to 15 Ib ft The calibration of the AEM Tru Time Adjustable Cam Gear is now complete Important information for the proper use of the Cam Bolts The recommended torque specification is 15 Ib ft Do not over torque The maximum torque specification is 20 Ib ft Anything less than the recommended torque value will allow the gear to slip 12 Month Limited Wananty Advanced Engine Management Inc wa mants to the consumer that all AEM High Performance products will be free from defects in material and workmanship fora period of twelve 12 months from date of the original purchase Products that fail within this 12 month warranty period willbe repaired or replaced at AEM soption
3. when determined by AEM that the product failed due to defectsin material or workmanship This warranty is limited to the repair or replacement of the AEM part In no event shall this warranty exceed the original purchase price of the AEM part nor shall AEM be responsible for special incidental or consequential damages orcost incurred due to the failure of this product Wananty claims to AEM must be transportation prepaid and accompanied with dated proof of purchase This waranty applies only to the original purchaser of product and is non transferable All implied warranties shall be limited in duration to the said 12 month waranty period Improper use orinstallation accident abuse unauthonzed repairs or alterations voids this waranty An AEM Wananty Claim Form Must Accompany All Wananty Claims Products retumed to AEM with no Retum Goods Authorization and or No Wananty Claim Fom may be rejected and retumed to sender AEM disclaims any liability for consequential damages due to breach of any written or implied waranty on all products manufactured by AEM Wa manty retums will only be accepted be AEM when accompanied by a valid Retum Goods Authorization RGA number Credit for defective productswill be issued pending inspection Product must be received by AEM within 30 days of the date RGA was issued
4. 6 x 1 2 5 1 304 Washer SS 5 16 x 570 x 1 32 1 10 7031 Instructions 1 10 507 Box Timing Gear Kit 1 10 922S E Decal AEM Electronics 1 2 810BK Inner Hub Honda 1 2 805HA Outer Gear Part Number 23 802 Quanity Part Number Description 5 1 2037 Bolt 5 16 x 1 2 5 1 304 Washer SS 5 16 x 570 x 1 32 1 10 7031 Instructions 23 602 1 10 507 Box Timing Gear Kit 1 10 922S E Decal AEM Electronics 1 2 810BK Inner Hub Honda 1 2 802HA Outer Gear Getting started a The procedure to change the gears is similar to the timing belt replacement procedure outlined in the factory service manual i Note This would be an appropriate time to replace the timing belt if replacement is due or is close to the replacement interval Obtain a suitable box or container to hold the hardware that will be removed from the engine during this installation This will aid in the prevention of lost nuts and bolts Disconnect the negative battery terminal before starting these procedures Raise the front of the vehicle and support on jack stands To ensure maximum safety use jack stands that are properly rated for the task Remove the four nuts securing the driver side wheel and tire Remove wheel and tire and set aside 2 Removal of the stock cam Gear 9 8 N m 1 0 kgf m 7 2 Ibf ft ee aN ROR YS A TIMING BELT PMPA CAP NUT 6x 1 0 mm B18B amp H23A 9 8 N m 1 0 kgfm 7 2 Ibf ft WASHER Replace when damage
5. actory specifications Tension Adjustment i i The tensioner is spring loaded to apply proper tension to the belt automatically after making the following adjustment Always rotate the crankshaft counterclockwise when viewed from the pulley side Rotating it clockwise may result in improper adjustment of the belt tension iii Set the engine to TDC iv Loosen the adjusting bolt 180 v Rotate the crankshaft counterclockwise so that the timing belt moves 3 teeth on the camshaft pulley to create tension on the timing belt vi Make sure the timing belt and camshaft pulley are engaged securely vii Torque the adjusting bolt Rotate the crankshaft 6 complete revolutions and return it to the TDC mark on the crankshaft pulley The TDC marks on the AEM cam gear should align with the diagrams above Note f marks do not line up the timing belt must be removed the cam gear repositioned and the timing belt re installed Repeat this step until the TDC marks on the AEM cam gear line up properly 4 Calibration of the Tru Time Adjustable Cam Gear Adjustment of an AEM cam gear is best carried out on a dynamometer so that quantifiable results can be measured a Loosen the cam gear bolts b To change the cam timing place a wrench on the camshaft bolt Turn the wrench counter clockwise to advance the cam timing or clockwise to retard the cam timing c Rotate the cam timing to the desired position and retighten the cam gear bolts to
6. d No 7 or deteriorated O CYLINDER HEAD COVER Refer to page 6 31 when installing RUBBER SEALS Replace when damaged or deteriorated 8 x 1 25 mm 37 N m 3 8 kgf m 27 Ibf ft BACK COVER ADJUSTING BOLT 10 x 1 25 mm 54 N m 5 5 kgf m 40 Ibf ft Loosen only do not remove MIDDLE COVER 6x 1 0 mm 9 8 Nm 1 0 kgf m 7 2 Ibf ft ALTERNATOR Inspection page 6 9 ae Adjustment page 6 9 Install with c oncave INA ZA amp BELT Replacement page 6 10 surface facing in Pre Se D Adjustment Clean p gt Section 23 AS CRANKSHAFT TIMING BELT As 2 gt acre r DRIVE PULLEY emoe any oi Remove any oil je and clean the timing belt guide plate side and clean Install with concave surface facing out Remove any oil and clean PULLEY BOLT 14 x 1 25 mm 177 N m 18 0 kgf m 130 Ibf ft Replacement page 6 8 a Remove the spark plug wires Remove the cap nuts and washers securing the valve cover to the cylinder head Remove valve cover Remove the bolts securing the middle cover Remove the middle cover Remove the rubber plug to expose the belt tensioner adjustment bolt B16 B18C amp H22A 6x 1 0 mm e 9 8 N m 1 0 kgf m 7 2 Ibf ft IGNITION WIRE COVER IGNITION IGNITION WIRE CLAMP b Remove the nuts securing the ignition wire cover Remove the ignition wire cover Remove the spark plug wires WASHER Replace when damaged izi i ere B1 6 B18C amp H22A or deteriorated an
7. e 9 8 N m 1 0 kgfm 7 2 Ibf ft CYLINDER HEAD COVER Refer to page 6 78 when installing RUBBER SEALS Replace when damaged or deteriorated TIMING BELT Inspection page 6 48 Adjustment page 6 48 Replacement page 6 49 MIDDLE COVER 6x 1 0 mm 9 8 N m 1 0 kgf m 7 2 Ibf ft 56 N m 5 7 kgf m 41 Ibf ft Z Qf 9 8 N m 1 0 kgf m 7 2 Ibf ft k S i s Na am iiia 7 2 Ibf ft 10 x 1 25 mm Install with concave 54 N m 5 5 kgf m surface facing in 40 Ibf ft Clean For adjustment only do not remove TIMING BELT Install with concave DRIVE PULLEY surface facing out LOWER POMEY BOLT Remove any oil and clean Remove any oil and clean COVER a an kgf m 130 Ibf ft CRANKSHAFT PULLEY Replacement page 6 47 Remove any oil and clean the timing belt guide plate side c Remove the cap nuts nuts and washers securing the valve cover to the cylinder head Remove valve cover Remove the bolts securing the middle cover Remove the middle cover Remove the rubber plug to expose the belt tensioner adjustment bolt PIN PUNCHES 5 0 mm B18B amp H23A FN UP MARKS OIL PUMP TDC mark aligned with the pointer on back cover TDC MARK PULLEY CRANKSHAFT PULLEY B Series TDC MARKS Painted White TDC MARKS IW POINTER ON THE OIL PUMP HOUSING a of rotation CRANKSHAFT TDC POSITION POINTERS AIT ON BLOCK INSPECTION TDC MARKS WHITE FLYWHEEL DRIVE PLATE c Align the moto
8. lications where an aftermarket or reground performance cams are installed or the cylinder head has been milled 0 005 or more The use of these cam sprockets allows the extraction of maximum power from your engine We have recorded gains of up to 10 15 horsepower due to cam timing tuning using adjustable cam sprockets When an aftermarket or reground cam is installed the original manufacturers cam timing specifications are no longer accurate The adjustable cam sprocket allows you to make necessary adjustments to cam timing to maximize the performance of your engine This is accomplished by degreeing in the optimum cam timing for a particular engine set up The adjustable cam gear is especially effective when used with heads that have been milled The adjustability of the gear allows the accommodation of the changes in cam timing due to the variation of timing belt length from the bottom gear to the top gear when the head is milled If the head has been milled 0 005 or greater the relationship between the head and the block is altered by moving the head closer to the crankshaft resulting in retarded cam timing It must be emphasized that the preceding descriptions are generalizations and any adjustments made must be done with a conservative approach and on a dynamometer or on a racetrack We do not condone any illegal activity on the street Part Number 23 801 Quanity Part Number Description 5 1 2037 Bolt 5 1
9. r to TDC Always rotate motor in a counter clockwise motion CAMSHAFT PULLEY 10 x 1 25 mm 51 N m 5 1 kg m 37 lb ft BELT e Remove the bolts securing the camshaft TENSIONER pulleys Remove the camshaft pulleys and ADJUSTING BOLT keyways 10 x 1 25 mm 54 N m 5 5 kgf m 40 Ibf ft For adjustment only do not remove d Loosen the belt tensioner bolt 180 degrees Push the tensioner to release tension from the belt and then retighten the adjusting bolt Remove the timing belt 3 Installation of the AEM Cam Gear a i ii Inspect the AEM Tru Time Adjustable Cam Gear i The laser etched timing marks on inner hub and the outer gear should be clear and easy to read Loosen the cam gear bolts on the AEM cam gear and rotate the hub clockwise and counter clockwise It should move freely without any binding Set the timing mark to 0 and tighten the five cam gear bolts to 15 Ib ft Compare the AEM cam gear to the O E cam gear Make sure the major features of the two cam gears are identical This will include the timing belt tooth profile kKeyway location and laser etched TDC marks If the AEM cam gear does not function as described or look to be dimensionally correct in any way do not continue with this installation Install the AEM cam gear using the instructions for the removal of the O E cam gear in the opposite order Apply engine oil to the threads of the camshaft bolt and crankshaft bolt Torque to f
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