cam installation

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Jan 8, 2012 | 05:11 PM

#11

drive2live2ride

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Joined: May 2008

Posts: 364

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From: Bella Vista, AR

Quote:

Originally Posted by RHillbilly

Thats what i was asking if you put cams in and dont rotste anything and the outer gears line up the cams cant be off a tooth

The cams can be off one tooth or several teeth if they weren't installed into the cam plate correctly. If when installed into the cam plate the timing marks on the cams are off, the "outer gears" can still be aligned with each other correctly, but your timing marks on the cams would be off. The timing marks on the "outer gears" only take into account the timing of the crank shaft to the timing of the rear cam. So the answer to the original is yes the outer gears can be in time and the front cam could be off one tooth or more if not installed correctly.

Think about it like this. You could completely remove the front cam and still align the rear cam and crank sprockets correctly. At that point you could install the front cam at any position on the clock that you wanted to, but only one position would be correct.

It's a foot bone connected to the ankle bone, the ankle bone connected to the leg bone sort of thing. Think about it in reverse order from how the cams are installed. The crank sprocket can only fit onto the crank spline in one position. From there the engine can be rotated so the timing mark on the crank sprocket faces the rear cam sprocket. Then the timing mark on the rear cam sprocket must be in alignment with the timing mark on the crank sprocket. From there the timing mark on the front cam must be in alignment with the timing mark rear cam.

The crank, rear cam and front cam can all move independently of each other until linked together with the inner and outer chains. So any one of the three could be out of time while the other two are in time IF it was installed incorrectly to begin with.