Camshaft Timing and degreeing the cam?

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Oct 29, 2007 | 05:54 AM

#31

cehan

Registered User

Joined: Jun 2005

Posts: 387

From: Brandon, Fla.

Quote:

Originally Posted by biggrizzly

So what I understand is that I need to install my gears straight up, dot to dot and then degree the cam. It should measure 105.0* at #1TDC on both the piston and cam lobe. Am I correct so far?

If this measurement is off, then I need to advance or retard the cam timing by shifting the crank gear to either the advance key or retard key. Am I still on here?

The only problem is that the cheap chainset I bought to replace my stocker has only one keyway in it. I'm going to return it and get the Cloyes CLO-C-3039. I think that will do it.

With the timing gears dot to dot, #6 will be at TDC, with the timing gear dots both at 12 o'clock position, #1 cylinder will be at TDC.

You don't need a crank sprocket with multiple keyways to make minor corrections to the cam timing. Use an offset key like Mr. Gasket p/n 987G (2*) or 988G (4*). So, for example, if your degree check indicates the cam is 2* retarded, use the 987G to bring it straight up. Pay attention to how you install the key. Installing it one way retards the crankshaft relative to the cam position and should bring the timing right in, installing it the other way further advances the crank position and will double the amount that the cam is off when you degree the cam again to check your results. When degreeing the cam, if you can get it within one degree of spec, that is considered acceptable.

Oct 29, 2007 | 07:09 AM

#32

biggrizzly

Thread Starter

Registered User

Joined: Sep 2007

Posts: 53

From: Severn, MD

Quote:

Originally Posted by cehan

You don't need a crank sprocket with multiple keyways to make minor corrections to the cam timing. Use an offset key like Mr. Gasket p/n 987G (2*) or 988G (4*).

I just went and checked out those keys - Now why didn't I think of that?
Clever