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Timing chain replacement
Thread Starter
Drifting
Joined: Feb 2001
Posts: 1,421
Likes: 0
From: Henderson, NV
Timing chain replacement
Hi all,
Anyone ever replaced theirs? I have almost 50,000 miles on her and am wondering if I should do this. If anyone has done this themselves, is it hard to do?
Steve
Anyone ever replaced theirs? I have almost 50,000 miles on her and am wondering if I should do this. If anyone has done this themselves, is it hard to do?
Steve
Drifting
Joined: Jul 2000
Posts: 1,517
Likes: 1
From: Stockholm
Re: Timing chain replacement (Blackjetvette97)
It have been several posts on the forum about broken timing chains, especially on high hp engines. I'm one of the unlucky with a broken timing chain :( The recommendation I got was to get the Cloyes gears from Katech for $100. Also, get the Jwis Ketting chain from Katech for $100 and throw away the stock chain that comes from Cloyes with the gears. Stock chains are marked 'RENOLD'."
I hope this helps.
:seeya
I hope this helps.
:seeya
Racer
Joined: Jul 2001
Posts: 313
Likes: 0
From: Norfolk VA
Re: Timing chain replacement (Blackjetvette97)
I will be doing a h/c soon and I am getting the GM Racing HME chain and keeping the stock gears. The chain runs about $100. Just call 931-648-3333. I decided on this combo after talking to several of the forum members and Cartek.
Lane
Lane
Race Director
Joined: Sep 1999
Posts: 12,435
Likes: 916
From: CONCORD NC
Re: Timing chain replacement (rocketrider2)
GM Racing highly recommends the HME chain. HME makes indy-car chains, and even though it is stock style, it is apprearantly much stronger than the OEM chain.
That is what is in my current engine, although I think Katech is putting a different unit in my new engine.
Dave
That is what is in my current engine, although I think Katech is putting a different unit in my new engine.
Dave
Le Mans Master
Joined: Apr 2000
Posts: 7,248
Likes: 0
Re: Timing chain replacement (y2khardtop)
GM Racing highly recommends the HME chain. HME makes indy-car chains, and even though it is stock style, it is apprearantly much stronger than the OEM chain.
That is what is in my current engine, although I think Katech is putting a different unit in my new engine.
Dave
That is what is in my current engine, although I think Katech is putting a different unit in my new engine.
Dave
Thx!
Safety Car
Joined: Feb 2000
Posts: 3,683
Likes: 0
From: Austria
Re: Timing chain replacement (Blackjetvette97)
I just ordered the Cloyes timing chain set form there:
http://www.sdpc2000.com/cart.asp?act...d=874&pid=8194
I´ve been told that this set has heavy duty gears and a heavy duty
(not stock) chain!!??
Michael
[Modified by Austrian Vette, 11:29 PM 1/11/2002]
http://www.sdpc2000.com/cart.asp?act...d=874&pid=8194
I´ve been told that this set has heavy duty gears and a heavy duty
(not stock) chain!!??
Michael
[Modified by Austrian Vette, 11:29 PM 1/11/2002]
Le Mans Master
Joined: Apr 2000
Posts: 7,248
Likes: 0
Re: Timing chain replacement (Austrian Vette)
Most salesman are idiots, esp. with our Timing Chains. Lots of bad info our there. Check the chain when it arrives. If it says 'RENOLD' on it, it's a Stock chain. Most Cloyes come with Stock chains.
WAIT.. Yes, your part number ending in 'AL' comes with the Heavy Duty chain. Could you take a picture of it?? They are very rare. I'd like to confirm that if they are using a Jwis Kettin for their true 'AL' Heavy Duty setup.
The problem with the 'AL' Cloyes part is that it can be VERY hard to find. It's also expensive.
Plz post a new thread and pic of the 'AL' Cloyes chain! Including side plate markings!! Thanks!
[Modified by MelloYellow, 6:33 PM 1/11/2002]
WAIT.. Yes, your part number ending in 'AL' comes with the Heavy Duty chain. Could you take a picture of it?? They are very rare. I'd like to confirm that if they are using a Jwis Kettin for their true 'AL' Heavy Duty setup.
The problem with the 'AL' Cloyes part is that it can be VERY hard to find. It's also expensive.
Plz post a new thread and pic of the 'AL' Cloyes chain! Including side plate markings!! Thanks!
[Modified by MelloYellow, 6:33 PM 1/11/2002]
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Safety Car
Joined: Feb 2000
Posts: 3,683
Likes: 0
From: Austria
Re: Timing chain replacement (MelloYellow)
Most salesman are idiots, esp. with our Timing Chains. Lots of bad info our there. Check the chain when it arrives. If it says 'RENOLD' on it, it's a Stock chain. Most Cloyes come with Stock chains.
WAIT.. Yes, your part number ending in 'AL' comes with the Heavy Duty chain. Could you take a picture of it?? They are very rare. I'd like to confirm that if they are using a Jwis Kettin for their true 'AL' Heavy Duty setup.
The problem with the 'AL' Cloyes part is that it can be VERY hard to find. It's also expensive.
Plz post a new thread and pic of the 'AL' Cloyes chain! Including side plate markings!! Thanks!
[Modified by MelloYellow, 6:33 PM 1/11/2002]
WAIT.. Yes, your part number ending in 'AL' comes with the Heavy Duty chain. Could you take a picture of it?? They are very rare. I'd like to confirm that if they are using a Jwis Kettin for their true 'AL' Heavy Duty setup.
The problem with the 'AL' Cloyes part is that it can be VERY hard to find. It's also expensive.
Plz post a new thread and pic of the 'AL' Cloyes chain! Including side plate markings!! Thanks!
[Modified by MelloYellow, 6:33 PM 1/11/2002]
I was thinking about that chain also and so I mailed to cloyes bevore I ordered that set from them. The guy at Cloyes sent me a mail and said that this AL setup IS with a special chain. All I can do is trust him.
I will not get it too soon as it will come together with my LS6 intake and that will not be snt out too soon I think :( because of the redesign and GM not sending the units out for any reason :cry
So my car sits in the garage waiting for the heads/cam install.
I will post pics off the timing chain set when I have it.
Michael
Safety Car
Joined: Feb 2000
Posts: 3,683
Likes: 0
From: Austria
Re: Timing chain replacement (Austrian Vette)
For those who wanted to know:
That´s what Wayne Gray form Cloyes wrote me about my timing chain setup:
"The set includes a billet steel cam spkt , billet steel crank spkt, oil pump driver and an extreme duty chain.
Gm uses powdered metal spkts and a lighter roller chain.
The chain in this set is the same type used in the olds aurora racing engine."
Michael
[Modified by Austrian Vette, 7:39 PM 1/13/2002]
That´s what Wayne Gray form Cloyes wrote me about my timing chain setup:
"The set includes a billet steel cam spkt , billet steel crank spkt, oil pump driver and an extreme duty chain.
Gm uses powdered metal spkts and a lighter roller chain.
The chain in this set is the same type used in the olds aurora racing engine."
Michael
[Modified by Austrian Vette, 7:39 PM 1/13/2002]
Team Owner
Joined: Dec 1999
Posts: 36,328
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From: Riverview FL
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Cruise-In V Veteran
Re: Timing chain replacement (seanr)
It have been several posts on the forum about broken timing chains, especially on high hp engines. I'm one of the unlucky with a broken timing chain :( The recommendation I got was to get the Cloyes gears from Katech for $100. Also, get the Jwis Ketting chain from Katech for $100 and throw away the stock chain that comes from Cloyes with the gears. Stock chains are marked 'RENOLD'."
I hope this helps.
:seeya
I hope this helps.
:seeya
Drifting
Joined: Jul 2000
Posts: 1,517
Likes: 1
From: Stockholm
Re: Timing chain replacement (SRitger)
SRitger,
I can not give you a good answer. I assume a Nitrous feed engine qualifies as a high hp engine. I do not know what causes the high load on the timing chain but one thing Peter @ DRM told me was that when doing alot of accelerate/engine break/accelerate/engine break you can snap the chain because of the sudden load changes.
If you remove the cover from the timing chain, the chain and gears looks like something you would use on your eight year old sons bike. I would change the chain and gears directly if I bought a new car even if it's stock :eek:
I can not give you a good answer. I assume a Nitrous feed engine qualifies as a high hp engine. I do not know what causes the high load on the timing chain but one thing Peter @ DRM told me was that when doing alot of accelerate/engine break/accelerate/engine break you can snap the chain because of the sudden load changes.
If you remove the cover from the timing chain, the chain and gears looks like something you would use on your eight year old sons bike. I would change the chain and gears directly if I bought a new car even if it's stock :eek:
Le Mans Master
Joined: Apr 2000
Posts: 7,248
Likes: 0
Re: Timing chain replacement (Austrian Vette)
Yes, the 'AL' is the heavy duty chain. The 'A' doesn't have it.
Do they have the 'AL' in stock? Normally it's hard to find that one. Yes, plz post pics of the chain & plate markings!
:)
Do they have the 'AL' in stock? Normally it's hard to find that one. Yes, plz post pics of the chain & plate markings!
:)
Melting Slicks
Joined: Jan 2002
Posts: 2,192
Likes: 0
Re: Timing chain replacement (SRitger)
It have been several posts on the forum about broken timing chains, especially on high hp engines. I'm one of the unlucky with a broken timing chain :( The recommendation I got was to get the Cloyes gears from Katech for $100. Also, get the Jwis Ketting chain from Katech for $100 and throw away the stock chain that comes from Cloyes with the gears. Stock chains are marked 'RENOLD'."
I hope this helps.
:seeya
So, can you break your timing chain using nitrous??? :confused:
I hope this helps.
:seeya
So, can you break your timing chain using nitrous??? :confused:
I think your valve springs would make the biggest difference. Stiffer springs wear chains faster.
Le Mans Master
Joined: Apr 2000
Posts: 7,248
Likes: 0
Re: Timing chain replacement (aces)
Slack/slop in the stock timing gears lets the chain hop off (Thanks GM), cheap metal/thin plated stock Timing Chain (Thanks GM, at least you saved $5) doesn't help...
Grippy clutches, fast clutch drops, downshifting can cause a shock to the engine that will grip a chain tight.
The Cloyes gears help by removing the slack and are larger.
Wouldn't stiffer springs wear lifters & cam lobes more than the chain? Haven't heard of that before.
[Modified by MelloYellow, 7:51 PM 1/13/2002]
Grippy clutches, fast clutch drops, downshifting can cause a shock to the engine that will grip a chain tight.
The Cloyes gears help by removing the slack and are larger.
Wouldn't stiffer springs wear lifters & cam lobes more than the chain? Haven't heard of that before.
[Modified by MelloYellow, 7:51 PM 1/13/2002]
Melting Slicks
Joined: Jan 2002
Posts: 2,192
Likes: 0
Re: Timing chain replacement (MelloYellow)
Wouldn't stiffer springs wear lifters & cam lobes more than the chain? Haven't heard of that before.
[Modified by MelloYellow, 7:51 PM 1/13/2002]
Think about it. Higher spring rates put more strain on the chain that turns the cam. Have you ever built a motor? When you turn it over w/o the plugs in it most of the resistance comes from the valvetrain. :blueangel:
