A little help on timing please...

[JeremyD]

OK - Have to admit that the timing aspect of engine building is a little intimidating for me.

Followed directions per wayne's book and Bently.

Crank at TDC (and blue arrow to highlight) Cams with keyway up. Set #1 intake valve clearance per book. A little movement/slides around but starts to grab a little when pulled out. Z tool on cam tower. Dial guage set up on retainer spring parallel to valve.



Anyway - the issue I have is the book says I should be able to get almost a complete 360 degree turn before hitting the 2.00 mm reference. (2.0mm given by camgrinder for 993 ss cams)

In reality I'm not quite getting 180 degrees before 2.0mm is showing up on the dial guage. (more like 5:00 o clock)


so, before I proceed - wanted to check in - help

[2.7RACER]

Jeremy,
I think you may have the right side cam in the left housing. Look at the lobes. The right side lobes intake and exhaust both are close together. That is about 20 to 30 degrees apart. The left side cam, the lobes are over 90 degrees apart. I think it was Bruce Anderson that said the right cam looks like rabbit ears in the air, where as the left side when turned properly forms a "L".
From your pictures, it doesn't look like you have a cam installed yet in the right side. Look at that cam. The intake and exhaust lobes should be close together. If the lobes are over 90 degrees apart, you are looking at the left side cam.
If you are still not sure post a picture of the cam.

[Jeff Alton]

Take a pic looking in at throught the rocker area down towards the first two lobes on the left hand cam. They should splay apart quite substantially. Not sure if this is the problem or not. It also looked like in the first pic the rotor was not pointing at #1, but that could just be the pic..

Jeff

[JeremyD]

Rookie mistake - I had the left and right side mixed up - Thanks for the responses...