Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - SBC OEM Hyd Roller Thrust issues
View Single Post
  #1 (permalink)  
Old 01-24-2013, 04:42 PM
zildjian4life218's Avatar
zildjian4life218 zildjian4life218 is online now
Listen and Learn
 
Last wiki edit: DIY junkyard electrical fan controller
Last journal entry: SBC 305 Twin Turbo
Last photo:
Join Date: Dec 2008
Location: WNY/Rochester, New York
Age: 25
Posts: 1,583
Wiki Edits: 7

Thanks: 44
Thanked 7 Times in 7 Posts
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 - 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.
Attached Thumbnails
Click image for larger version

Name:	2013-01-20_16-09-40_166.jpg
Views:	110
Size:	826.8 KB
ID:	70835   Click image for larger version

Name:	2013-01-20_16-09-50_726.jpg
Views:	104
Size:	1.37 MB
ID:	70836   Click image for larger version

Name:	2013-01-20_16-10-25_666.jpg
Views:	113
Size:	1.35 MB
ID:	70837   Click image for larger version

Name:	2013-01-20_16-12-19_784.jpg
Views:	100
Size:	730.5 KB
ID:	70838  

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