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boyt911sc boyt911sc is offline
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Join Date: Mar 2002
Location: Philadelphia, PA
Posts: 9,060
Cam timing procedure.........

Originally Posted by Tori View Post
Putting my 3.2 back together after re-ring, and head rebuild.

At the point of installing rockers. Cam timing is done, and started with #1 exh. rocker so i could measure valve to piston clearance as per Waynes book.

Once #1 exh. rocker is installed, engine will not turn over as that piston starts hitting the valve. Engine rotated fine prior with just the #1, #4 intake rockers installed.

I've installed #4-5-6 exhaust rockers with no issues and engine rotates fine. I've measured the valve to piston clearance on 1-2-3 intakes, (4.25mm-4.75mm)

Where should i start looking ? I don't know what would cause this. I have to assume cam timing is not correct.


How did you do the cam timing in the first place without the intake and exhaust rockers installed for #1 & #4 cylinders? Did you have the crankshaft set @ Z1 TDC for Cylinder #1? Keep us posted. Thanks.

Old 06-09-2018, 07:08 PM
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