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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Aug 2009 Posts: 8 New Guy | | New Guy Joined: Aug 2009 Posts: 8 | I'm rebuilding a manufactured in 64 283 that was in pieces when I got it. The manuals I have mention a thrust plate,but,I know the 350's have a thrust plate on the front of the engine but the 283 does not. Doe's the timing gear keep the cam from sliding back? What keeps the cam from sliding back and forth. I know there is a "button" that goes between the timing cover and gear,but,again, what goes between the back of the cam and the freeze plug?...if anything. Thanks. | | | | | Joined: Nov 2005 Posts: 6,100 'Bolter | | 'Bolter Joined: Nov 2005 Posts: 6,100 | Hy gc60c10, welcome, the cam does not have a "thrust plate" the timing gear stops, it from moving back too far and the distributor gear, timing chain, and ultimately the timing cover stop it from moving too far forward, not to mention all the lifters and the fuel pump drive load on the cam, hope that helps. | | | | | Joined: Aug 2009 Posts: 8 New Guy | | New Guy Joined: Aug 2009 Posts: 8 | Hey 3B! Thanks for the info, that really helps and now I can proceed. Thanks again. | | | | | Joined: Feb 2004 Posts: 29,875 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,875 | If you're using a double-row high performance timing chain, it's a good idea to install a nylon thrust button that keeps the cam from walking back and forth in the block. That causes ignition timing variations. Regular flat-link timing chains are stiff enough to get by without using thrust control. I like to braze a flat washer to the outside of the timing cover on race engines to reinforce the cover where the thrust button contacts it.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | | | | Joined: Aug 2009 Posts: 8 New Guy | | New Guy Joined: Aug 2009 Posts: 8 | Hi Jerry, I'm using a single row chain and I will use a trust button like you suggest. Thanks. | | | | | Joined: Feb 2004 Posts: 29,875 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,875 | Make sure there's a tiny bit of clearance between the button and the timing cover. I like to see 1/16" or less, but not close enough to make the button rub all the time.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | | | | Joined: Aug 2009 Posts: 8 New Guy | | New Guy Joined: Aug 2009 Posts: 8 | | | |
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