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Old 03-28-2012, 11:08 AM   #1
ULTRAZLS1

 
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Beware stock timing chain tensioner!

As some of you may have heard some people have reported problems or breakage with the stock ls3 timing chain tensioner.

It is a good thing that I ended up doing a heads and cam install this year. The shop who is doing my install called me today and said that the spring had popped out of the tensioner!!! They are currently trying to fish it out of the oil pan!

I had heard of this problem and supplied the correct parts for them to install (ls2 dampener).

I just cant believe how lucky I got with this. I wonder how long I was driving it around like this...and I run the thing to redline almost every time I drive it...wow

btw...forgot to mention...car has 9900 miles on it.
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Old 03-28-2012, 11:49 AM   #2
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Good thing you caught it in time before and serious damage occurred. This is why I also switched to the LS2 dampner setup when I did my cam install as well...
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Old 03-29-2012, 09:50 AM   #3
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Mine was ok when I opened it up, but it just seemed like such a cheesy setup, it has an LS2 damper and C5-R chain now.
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Old 03-29-2012, 10:21 AM   #4
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Quote:
Originally Posted by MikeOD View Post
Mine was ok when I opened it up, but it just seemed like such a cheesy setup, it has an LS2 damper and C5-R chain now.
I went with the same.
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Old 03-29-2012, 12:23 PM   #5
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Another problem thats starting to surface on a few LS3's has been a broken timing chain. It tends to happen more on the manual trans Corvettes but a couple Camaros as well. When mixed with with sticky tires if the axles, driveshaft or trans input shaft has not broken the timing chain has let go on a clutch drop.
I did an Iwis timing chain upgrade and chucked the LS3 tensioner for an LS9 dampner 2 years ago. Over 30k with alot hard miles on it now with no problems.
I work at Midway Chevrolet in Phoenix, we have a Performance center here and we currently upgrade all our timing chains with this when we do a Cam Package just to be safe.
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Old 03-29-2012, 01:38 PM   #6
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Good information to have, will be doing a cam upgraded here later this summer and will not upgrade the chain and dampener as well.

Thanks guys.
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Old 03-29-2012, 02:42 PM   #7
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Good information to have, will be doing a cam upgraded here later this summer and will not upgrade the chain and dampener as well.

Thanks guys.

You mean will upgrade?
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Old 03-29-2012, 03:36 PM   #8
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Thinking faster then I can type!!!! Yep, will upgrade!!
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Old 03-29-2012, 03:37 PM   #9
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Is a dual timing chain a good idea?
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Old 03-29-2012, 04:17 PM   #10
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Quote:
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Is a dual timing chain a good idea?
Yes except you cant use the melling 10296 high volume oil pump. Might be a problem with other pumps as well. Their is not enough clearance with the double chain in their.

It can be made to fit but I forget the details. Seemed like a headache...combined with the fact that the single katech c5r chain has never been broken even in racing aps was enough for me to forget about the double roller.
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Old 03-29-2012, 05:16 PM   #11
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I used to run my cam wiht the OEM timing chain 3 months ago up to date without any problems

my g6x3 come with single katech c5r chain but some of the part came later that's why I ran the OEM timing chain
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Old 03-29-2012, 05:39 PM   #12
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What about the L99 timing chain ?

What about the L99 timing chain ? I assume the chain is different ? But if so, is it suspect for durability also ?
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Old 03-29-2012, 06:01 PM   #13
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Quote:
Originally Posted by buzzy56 View Post
What about the L99 timing chain ? I assume the chain is different ? But if so, is it suspect for durability also ?
I am not sufficiently educated on the L99 to know that for sure....sorry.
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Old 03-29-2012, 09:00 PM   #14
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What about the L99 timing chain ? I assume the chain is different ? But if so, is it suspect for durability also ?
http://www.camaro5.com/forums/showth...9+timing+chain

^This thread mentions "the yellow plastic bit can get brittle" and that is the problem - do we have this same bit?
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Old 03-30-2012, 08:55 AM   #15
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Here is the picture of UltraZLS1s' failure..


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Old 03-30-2012, 09:13 AM   #16
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How much is the C5R chaing and the LS2 dampener and where is the best place to get these parts ?? My cam is going in this week...
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Old 03-30-2012, 09:19 AM   #17
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Here is the picture of UltraZLS1s' failure..


Wow I thought just the spring/clip popped out...didnt know it actually broke as well.
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Old 03-30-2012, 09:27 AM   #18
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How much is the C5R chaing and the LS2 dampener and where is the best place to get these parts ?? My cam is going in this week...
-chain...~$150.00
http://www.tickperformance.com/katec...ing-chain-lsx/

-ls2 timing chain dampener...About ~$12.00 depending on where you buy it. gmpartsdirect.com is usually one of the cheapest.

part # is 12588670
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Old 03-30-2012, 09:59 AM   #19
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Quote:
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Is a dual timing chain a good idea?
It's not needed sir, dual timing chain is so Chevy 350's lol all you need is a C5r single row. Besides harmonics are what really breaks chains. Ls2 dampner a c5r t/c and a good crank pulley.
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Old 03-30-2012, 10:19 AM   #20
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Originally Posted by ULTRAZLS1 View Post
-chain...~$150.00
http://www.tickperformance.com/katec...ing-chain-lsx/

-ls2 timing chain dampener...About ~$12.00 depending on where you buy it. gmpartsdirect.com is usually one of the cheapest.

part # is 12588670
THANKS !
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Old 03-30-2012, 10:41 AM   #21
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It's not needed sir, dual timing chain is so Chevy 350's lol all you need is a C5r single row. Besides harmonics are what really breaks chains. Ls2 dampner a c5r t/c and a good crank pulley.

+1

I spoke with a Cloyes rep about the dual chains... He said either use a Schaffler chain or a C5R chain if you want, the dual chain is heavy and cant take the higher RPM abuse that the singles can take because of it.
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Old 03-30-2012, 12:06 PM   #22
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Go online and do some research. Iwis timing chain/gears with LS9 dampner = nearly bulletproof.
It is the strongest most reliable set up when upgrading or doing the L99 to LS3 conversion.
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Old 03-30-2012, 01:57 PM   #23
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So this is something that only needs to be changed when doing the conversion or a cam install? I have an LS3 as you can see in my sig along with those mods... is this something I should change out for peace of mind or what? Thanks!
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Old 03-30-2012, 02:09 PM   #24
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So this is something that only needs to be changed when doing the conversion or a cam install? I have an LS3 as you can see in my sig along with those mods... is this something I should change out for peace of mind or what? Thanks!
I'd say no. Not worth it just for peace of mind.

I changed mine out with the cam swap since the stock timing chain and its bits had to come off anyway to do the swap. That way the labor was included.
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Old 03-30-2012, 02:28 PM   #25
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You really only need a T/c when adding cams or cam n heads. IMHO.

But changing that tensioner to a dampner would be a good idea and if you do that might as well change the t/c I guess. Lol ultraz's if Im not mistaken was a stock motor and it broke.
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