COMP Cams COMP4-103 user manual

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INSTRUCTIONS




Camshaft Installation and Degreeing Instructions
4.6/5.4-Liter 2 and 3 Valve Engines

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.

This instruction sh

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Step 10: Rotate the crankshaft keyway back to the 12 o’clock position, and attach the camshaft gears and timing chains, making sure that the timing marks on the camshaft and crankshaft gears line up with the copper coated links on the timing chains. Step 11: Use a 1” open end wrench on the hex bolster in the middle of each camshaft to hold it in place, and torque the camshaft bolt to the factory specification. Return tension to the timing chains following the factory recommended procedur

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Intake Centerline Method There are several accepted ways to degree a camshaft. COMP Cams® suggests the intake centerline method as the easiest and most accurate. This method of cam degreeing is very practical and indifferent to engine design characteristics. It simply involves positioning the center, or point of maximum lift, of the #1 intake lobe with Top Dead Center (TDC) of the #1 piston. The intake centerline method still requires accuracy to be correct, but it is somewhat forgiving.

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Step 10: Repeat the degreeing process on the opposite cylinder bank, this time using the number 6 intake valve to check the intake centerline. Note that it is not necessary to reestablish TDC in order to verify the #6 intake centerline. In the event that your camshaft did not degree in to the camshaft specification, it will be necessary to either advance (move the cam ahead) or retard (move the cam back) the camshaft to meet the suggested intake centerline. There a couple of degrees of a