Which timing set for my 77
Thread Starter
Drifting
Joined: Aug 2013
Posts: 1,453
Likes: 88
From: Easton Pennsylvania
Which timing set for my 77
Hello guys. I am going to button up the engine for my vette and have decided to replace the timing set. Even though the PO had already replaced it with a new one, And this engine was only run for the initial cam break in (Long story) the chain already has a little stretch in it from run such a short time. It is suppose to be a Cloyes but my guess a cheap one even though its a double roller.
So my question is. Which brand and which model should I replace it with that won't stretch like this one did in such a very short time? I do mean the entire timing set of course. What would some of you recommend?
Its the original gen2 chevy 5.7 with a regular flat tappet cam set-up.
So my question is. Which brand and which model should I replace it with that won't stretch like this one did in such a very short time? I do mean the entire timing set of course. What would some of you recommend?
Its the original gen2 chevy 5.7 with a regular flat tappet cam set-up.
Le Mans Master
Joined: Apr 2011
Posts: 6,284
Likes: 1,171
From: Hermosa
It may not be the timing set. Were the mains line bored? ( think that' the correct term) This can change the dimension from the crank to the cam thus causing some slack in the timing chain.
Thread Starter
Drifting
Joined: Aug 2013
Posts: 1,453
Likes: 88
From: Easton Pennsylvania
Yes they were but I don't think that this is the case here. I think that the guy just put in a cheap low budget set in. I have the receipts for every part of this engine except the timing set . I don't know I just want some recommendations on what timing set some of you recommend.
Pro
Joined: Feb 2014
Posts: 692
Likes: 2
From: Seguin TX
This is the style and type I just put in mine and it is all made in USA. This is the link to the one for your car.
http://www.oreillyauto.com/site/c/de...0422&ppt=C0141
http://www.oreillyauto.com/site/c/de...0422&ppt=C0141
Le Mans Master
Joined: Apr 2011
Posts: 6,284
Likes: 1,171
From: Hermosa
Yes they were but I don't think that this is the case here. I think that the guy just put in a cheap low budget set in. I have the receipts for every part of this engine except the timing set . I don't know I just want some recommendations on what timing set some of you recommend.
http://www.summitracing.com/parts/cl...make/chevrolet
Any Cloyes double roller set is going to be good.
Le Mans Master
Joined: Apr 2011
Posts: 6,284
Likes: 1,171
From: Hermosa
I don't see that amount of slack as a problem. It will have some effect on the valve timing not significant unless this is a high performance thing and the timing is critical or piston to valve clearance is very close.
The teeth on those gears look good as far as wear is concerned not bent over looking or super sharp short tips.
If it was mine I'd leave it unless I was hearing strange noises or symptoms, excessive wear on the teeth or chain.
Those tabs on the top gear that bend over to keep the bolts from backing out look like they might need changing however.
Bent too many times and they break off.
The teeth on those gears look good as far as wear is concerned not bent over looking or super sharp short tips.
If it was mine I'd leave it unless I was hearing strange noises or symptoms, excessive wear on the teeth or chain.
Those tabs on the top gear that bend over to keep the bolts from backing out look like they might need changing however.
Bent too many times and they break off.
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Thread Starter
Drifting
Joined: Aug 2013
Posts: 1,453
Likes: 88
From: Easton Pennsylvania
I don't see that amount of slack as a problem. It will have some effect on the valve timing not significant unless this is a high performance thing and the timing is critical or piston to valve clearance is very close.
The teeth on those gears look good as far as wear is concerned not bent over looking or super sharp short tips.
If it was mine I'd leave it unless I was hearing strange noises or symptoms, excessive wear on the teeth or chain.
Those tabs on the top gear that bend over to keep the bolts from backing out look like they might need changing however.
Bent too many times and they break off.
The teeth on those gears look good as far as wear is concerned not bent over looking or super sharp short tips.
If it was mine I'd leave it unless I was hearing strange noises or symptoms, excessive wear on the teeth or chain.
Those tabs on the top gear that bend over to keep the bolts from backing out look like they might need changing however.
Bent too many times and they break off.
Last edited by persuader; Apr 27, 2014 at 04:33 PM.
Pro
Joined: Feb 2014
Posts: 692
Likes: 2
From: Seguin TX
You will have a little slack in the chain on one side or the other depending on the crank and cam set up. The amount you show now is normal for any chain after it breaks in. The one I just replaced had 5/8" slack in it and I could flop in around in there.