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Old 01-24-2013, 04:42 PM
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SBC OEM Hyd Roller Thrust issues

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 - 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!


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.
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Last edited by zildjian4life218; 01-24-2013 at 04:47 PM.
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