Cam timing tool question
 

When your timing your early style cams (65 up to 83?) you have a nice cut surface on the nose of the cam to put your tool on for turning the cam during timing. On the later style cams with a bolt, what do you use to turn the cam?? Right now I'm using the bolt and some washers and then tighten it up on the cam, but when your turning the cam CCW under valve spring pressure during cam timing, the bolt wants to come loose. Is there a proper tool for this job?

Early cams are easy because they have a 17mm flat surface on the snout of the cam. THe later style with the bolt is harder because there's nothing to grip. There used to be a tool for that but I don't see it on SIRTOOLS (sold here by our host) site anymore...

HI 356RS
Loads of info for you hear;

http://forums.pelicanparts.com/911-engine-rebuilding-forum/398309-cam-timing-911-3-0sc.html

regards mike

Thanks Mike.

I used a very small screwdriver to lever the cam against the chain sprocket for very small movements. Set and check, adjust, set and check... etc... See:

http://forums.pelicanparts.com/911-engine-rebuilding-forum/396589-timing-curiosity-observation.html

Best regards,

Michael

you don't need to turn the cam on the later style. you set up the dial gauge as usual for timing the cams, then turn the engine to the point where the cam timing is what you want, regardless of where the pulley mark ends up, then pull the pin from the sprocket and turn the crank back or forward to the TDC Z1 mark and reinstall the pin in the sprocket. snug the bolt and recheck the timing and do a minor readjust if needed.

Now that really explains how to do it. So simple. Thank you John.

If this works it certainly is the way. When I went to return the the crank to Z1 the cam always went with it. *shrug* So I reversed it... set the crank to Z1 and move the cam :) Obviously, I would have rather it went smoothly the other way. I would have felt more comfortable :)

Best regards,

Michael