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Old 09-12-2010, 03:43 PM   #1
amorgan93
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Default Timing chain help. 94 sl2

so when i crank up my 94 sl2 cold, it has a noise coming from the timing chain at any rpm below 1200. Once the motor warms up, and the oil gets hot, the noise completly goes away. I figure i need a timing chain kit but im starting to think the chain is fine. I believe the problem is due to the hydraulic timing chain tensioner. Because when the oil gets hot, the oil gets thinner and in my mind would flow better to the tensioner. I took off the cam cover and inspected the cams, no breaks, the cams actually look pretty new. The motor has 195k miles on it and there is absolute minor wear on the cam lobes and lifters. And the teeth on the sprockets on the cams looks fairly new. So i'm thinking about trying just replacing the chain tensioner. What do you guys think? here is video of my cars noise. http://www.youtube.com/watch?v=Mz5-PwOIfSg

my dad is a mechanic and he believe it is also the hydraulic tensioner.

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Old 09-12-2010, 03:49 PM   #2
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Default Re: Timing chain help. 94 sl2

With how freaking annoying it would be to "just" replace the tensioner with the engine in the car you might as well do the chain & guides as well.
I think the kit I bought was around $150, came with a chain, guides, and sprockets for the cams and crankshaft, tensioner and maybe something I'm forgetting. It ways the Cloyes set from rockauto if it helps any.

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Old 09-12-2010, 03:59 PM   #3
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Default Re: Timing chain help. 94 sl2

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Originally Posted by fetchitfido View Post
With how freaking annoying it would be to "just" replace the tensioner with the engine in the car you might as well do the chain & guides as well.
I think the kit I bought was around $150, came with a chain, guides, and sprockets for the cams and crankshaft, tensioner and maybe something I'm forgetting. It ways the Cloyes set from rockauto if it helps any.
im not sure i want to spend $150 bucks on this car. i already need 2 front control arms because the ball joints are shot, i also need a new sway bar because the car ran with no bushing on the right side and the sleeve and washer is made to the sway bar. I thought they came off so i turned it hard thinking that it was just seized by rust. ended up turning the entire piece that is pressed into the hollow sway bar. Plus the car smokes badly but stops when the motor gets hot. Ive already had to replace the radiator and starter. I tried doing a MMO soak for around 20 hours, which didn't help the smoking. And i don't want to just junk the car.

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Old 09-12-2010, 04:13 PM   #4
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Default Re: Timing chain help. 94 sl2

Then run it until the chain decides it wants to take a peek through the valve cover.

...
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Old 09-12-2010, 04:22 PM   #5
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Default Re: Timing chain help. 94 sl2

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Originally Posted by Low Saturn View Post
Then run it until the chain decides it wants to take a peek through the valve cover.
the thing is, the chain doesnt look that old. i've only had this car for a couple months. i believe the previous owner may have replaced it. i mean the cam sprockets looked immaculant

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Old 09-12-2010, 04:28 PM   #6
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Default Re: Timing chain help. 94 sl2

A worn chain and new chain dont look that much different. Its not until you get it out and compare it to a new one a see the difference in lengh.

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Old 09-12-2010, 05:47 PM   #7
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Default Re: Timing chain help. 94 sl2

Quote:
Originally Posted by Low Saturn View Post
A worn chain and new chain dont look that much different. Its not until you get it out and compare it to a new one a see the difference in lengh.
oh ok

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Old 09-12-2010, 06:14 PM   #8
SLCraig
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Default Re: Timing chain help. 94 sl2

I'd say if you chain was indeed bad, it would make noise all the time, not just when cold.
My car makes noise all the time, warm or cold. Only noticeable at idle.

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Old 09-12-2010, 06:25 PM   #9
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Default Re: Timing chain help. 94 sl2

It could be the belt tensioner which tends to be noisy at low rpm's when it is going bad. A quick test is to remove the serpentine belt and run the engine for only a minute or so to avoid overheating. If the noise is gone, it is not the timing chain.

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Old 09-12-2010, 08:40 PM   #10
azrocketman
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Default Re: Timing chain help. 94 sl2

If I'm not mistaken, the tensioner ratchets out from hydraulic pressure but is kept extended by a pawl. I think you are going down a rabbit hole chasing the tensioner.

Steve

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Old 09-14-2010, 02:59 AM   #11
DES1988
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1994 SL2
Default Re: Timing chain help. 94 sl2

My tensioner went bad on my 94 Sl2. It was a $30 part the plastic boot on the end busted off and you could hear it rattle around low rpms. It was held in place, but with the boot gone it didn't extend any further and the guide was free to move.

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