Rotate the crankshaft until the timing mark is facing the 6 o’clock position, and the keyway is in the 11 o’clock position, making sure that the timing marks on the camshaft gears are pointing above the cylinder head. This will put the #1 piston at Top Dead Center (TDC). Remove the factory camshaft gears, and replace them with your new COMP Cams® Adjustable Gear Set.Be sure to verify that the adjusters are set to 0º before reinstalling the timing chains.To install the timing chains, line up the colored links on the chains with the timing marks on the crank and cam gears, and then install and release the timing chain tensioners. COMP Cams® strongly recommends that you degree the left and right cams in order to verify that the chains are installed correctly before proceeding with any further adjustments. Refer to a factory engine manual for torque specs and assembly/disassembly procedures.Note: the right hand (passenger side) gear uses the smaller keyway. The left hand (driver side) gear uses the larger keyway.
Making adjustments –Using a wrench to prevent the camshaft from turning, loosen the six (6) adjustment bolts to allow the center hub of the gear to rotate – note that continuing to hold the cam with a wrench will prevent it from turning once the adjuster bolts are loose
– this will help to prevent valve train damage. Use the wrench to rotate the cam to the desired setting (the gears have a 0º - 12º range of adjustment for either advance or retard), and tighten the adjusting bolts on both camshafts.Remember that it is absolutely necessary to adjustbothcamshafts when changing your cam timing – for example, if you adjust the left camshaft to 8° advanced, you must also adjust the right camshaft to 8° advanced! Failure to do so will result in severe engine damage.
Rotating the camshaft clockwise will advance the cam timing, and rotating it counterclockwise will retard the cam timing. Be sure to degree the cams whenever you make an adjustment in order to verify that your camshafts have been set as intended.Caution! – when adjusting your camshaft timing, be sure to verify that you have adequate valve to valve and piston to valve clearance – severe engine damage will result from inadequate clearance.
Final assembly –Once both cams have been properly adjusted, remove each adjusting bolt one at a time, and verify that each one has a lock washer and flat washer installed. Apply a small amount of thread lock to each attaching screw, and torque to specs below (also see diagram on next page).
The two outer screws must be torqued to: 80-85 in/lbs
The two inner screws must be torqued to: 60-65 in/lbs
Loctite must be used on all hardware!
Note: the adjusting bolts are made extra long in order to facilitate ease of adjustment– it is critical that you verify that you have adequate running clearance for the bolts – if not, youmustgrind the bolts for clearancebeforestarting your engine, or severe engine damage may result.