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Old 01-24-2013, 04:52 PM
oldbogie oldbogie is online now
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Quote:
Originally Posted by zildjian4life218 View Post
Okay I'm stumped. This is what I have. I have a 350 block out of a 1991 pickup that was originally flat tappet. It has the provisions for the oem roller setup so I got a oem style roller cam from howards with the stepped nose. (180325-08). I currently do not have the rear cam plug in the block. The cam moves freely back and forth without the timing gear attached. This is the timing set im using Summit Racing® True Roller Timing Sets SUM-G6601 - SummitRacing.com. Its for an OEM roller setup for a NON vortec engine.

I know the last picture is a tad fuzzy but you can see the nose of the cam sticks out about an 1/8". The recess in the timing gear is about an 1/8th" as well.

Here is my problem.... It seems as though when I tighten down the timing gear it sandwiches the thrust plate between and draws the timing gear and cam together and eliminates any thrust clearance I have.


What am I doing wrong.... any ideas?

Thanks for your help everyone!

,Shane



Edit: Also this motor was run for about 50 miles with the clearance issues. Wear can be seen on the thrust plate and thrust surface on the timing gear.
What's it's doing in drawing the gear down to the thrust plate is correct, but the gear should bottom its hub (bolt circle) against the cam snout before it binds on the thrust plate. Some thin shim stock between the cam snout and the gear under the bolts should solve the problem by seating the gear before it clamps the thrust plate between it and the cam.

Bogie
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