Timing Chain Installation PDF Manual Instructions

Thank you for choosing COMP Cams® products; we are proud to be your manufacturer of choice. Please read this instruction sheet carefully before beginning installation, and also take a moment to review the included limited warranty information.

The following instructions begin after the timing cover and old timing set have been removed. Installing the timing set and degreeing the camshaft will be easier if you loosen the rocker arms so that the camshaft can turn freely. You should be able to turn the camshaft by hand. Make sure that the engine mounting surfaces and your new timing set has been thoroughly cleaned with a good solvent. If you are using a timing set with three
keyways, select the appropriate keyway for your camshafts timing specifications. COMP Cams® recommends the standard timing position for most applications. This position uses the round or “O” timing mark and round or “O” keyway mark.

Step 1 – Lower Gear Installation
Install your lower timing gear on the crankshaft making sure that the crankshaft timing gear is fully seated against the crankshaft flange and timing marks are facing out toward you. If your engine is one with a press on crankshaft timing gear, NEVER STRIKE THE GEAR WITH A HAMMER, CHISEL, OR PUNCH.

Step 2 – Chain Installation
Now that the lower timing gear has been installed, check the timing mark alignment in your engine manual. Rotate the crankshaft using you crankshaft socket until the timing mark on the gear is in the proper position. If your engine is equipped with a camshaft retaining plate or thrust plate, it should be installed at this time. Some engines have a spacer between the camshaft and the camshaft timing gear, and some camshaft timing gears have the spacer incorporated into the gear. To ensure that you have the right amount of camshaft endplay and the correct combination of parts check the endplay of the camshaft. It should be within .004” and .008” when the retainer plate is used. NOTE: To check camshaft endplay when using a camshaft retaining plate and camshaft timing gear onto the end of the camshaft. Use a feeler gauge to check the clearance between the camshaft retaining plate and front camshaft bearing journal. The proper clearance should be between .004” and .008”. Temporarily install your camshaft timing gear and rotate the camshaft until the timing mark on the camshaft gear is in the proper position according to your engines repair manual instructions. Remove the camshaft timing gear and loop the chain over the camshaft gear. Lift the camshaft gear into place on the camshaft. Install the camshaft bolt or bolts (finger tight for now). Check your manual again for the proper timing
mark positions and make sure that both the camshaft timing mark and crankshaft timing mark are correct. If this procedure is missed by even one tooth engine damaged can result.

Download Timing Chain Installation PDF Manual Instructions