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Problems/Service/Maintenance Do you have problems with your new 2.0, 2.2, or 2.4L? What kind of service did you have done?

LSJ Bad engine noise - timing chain? or something else...

This is a discussion on LSJ Bad engine noise - timing chain? or something else... within the Problems/Service/Maintenance forums, part of the General category; Ok, my 06 ss/sc... we were having some fun last night (hit about 130 that was fun) on the highway, ...

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Old 06-06-2011, 08:59 AM   #1
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Unhappy LSJ Bad engine noise - timing chain? or something else...

Ok, my 06 ss/sc...

we were having some fun last night (hit about 130 that was fun) on the highway, all was well.

got off the highway and was just cruising, then noticed some engine noise.

I've only had the car for about a month but im positive i havent quite heard this yet. And im not talking about the fuel system or exhaust, allthough it kind of sounds like the pitter patter the exhaust makes, just louder

Heres how the noise is: You don't rly hear it at idle, not even much when you rev, but once im in gear and moving, its kind of a rattle/ticking that increases with the rpm. almost like a misfire of some sort (no CEL on btw) or lifters.. im scared

The engine seems to be running ok, my gas mileage is still good, and (although im scared to check) the car still accelerates fine.

But its the noise that gets me is this the timing chain tensioner? all the engine noise posts i culd find anything like this lead to this... but the sounds they describe aren't quite matching right up with mine so idk. took a vid while accelerating but my crappy phone couldn't pick up the noise.
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Old 06-06-2011, 09:18 AM   #2
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Only happens in gear? Transmission problem maybe. Does it go away if you put the clutch in while rolling?

Miles on the car?
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Old 06-06-2011, 09:26 AM   #3
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Quote:
Originally Posted by ItalianJoe1 View Post
Only happens in gear? Transmission problem maybe. Does it go away if you put the clutch in while rolling?

Miles on the car?
well it'll do it a little if u rev it, but im pretty sure its nothing to do with the gears. im at 35k now, its an 06 ss. i'd have to check with the clutch thing but maybe... but its definately when the engine rev is going up, like under acceleration. once im just cruising in gear its not really much noise until i gotta hold speed again.
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Old 06-06-2011, 09:39 AM   #4
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Sure it's not exhaust?
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Old 06-06-2011, 10:45 AM   #5
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Quote:
Originally Posted by ItalianJoe1 View Post
Sure it's not exhaust?
mmm.. semi sure... like the exhaust isn't rly any louder than it was previously, but yea, the ticking noise DOES sound a little bit like the stock pitter patter it makes, just louder.. idk. the thing was, i was just beating on this car on the highway for a decent while just before i noticed the sound so im worried i F'd something up haha, i better check it for leaks though who knows.

GOOD THING IS, my cars under the powertrain warranty, so i guess im just gonna bring her in there, ill get back to this once i find out what the problemo is

still open for suggestion though (it sucks trying to explain noises while typing lol)
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Old 06-06-2011, 01:58 PM   #6
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OK u know what, i just went out on lunch with my mechanic at work, and we're thinkin' its just an exhaust leak. i just didn't know cuz im used to V6 engines and when they leak u get more drone than crappy rattly noise... but yea its probly my exhaust somewhere
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Old 06-06-2011, 03:59 PM   #7
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Check your flex pipe. They crack all the time.
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Old 06-06-2011, 04:06 PM   #8
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Exactly what I was thinking. Hard shifting/driving, especially with the stock mounts, can easily break the flex section of a stock or aftermaket downpipe.
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Old 06-07-2011, 05:03 AM   #9
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im gonna say cracked flex pipe in the stock d/p or belt tensioner. i never heard of a stock lsj having a bad timing chain anything at 36k.
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Old 06-07-2011, 04:43 PM   #10
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sweet im gonna check that **** out, thanks. ill get back to yall on the verdict
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Old 06-07-2011, 07:58 PM   #11
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Quote:
Originally Posted by 06SS ALL DAY View Post
im gonna say cracked flex pipe in the stock d/p or belt tensioner. i never heard of a stock lsj having a bad timing chain anything at 36k.
Careful, I have 22K, timing chain tensioner seized up and the timing guide screw sheared off and I drive my car nice. Now I am paying to replace all the intake valves and possible a new head but that's after trying to change the timing chain tensioner while I read on this site its near impossible to jump timing and it did. I also have an 06 ss/sc.
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Old 06-08-2011, 12:43 PM   #12
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Yep..... tensioners go in Lsj's alot..... but they are usually worse at idle and go away as it goes up in the rpm. These trannys will make a rattle on deceleration .... both of mine do it and it's more noticeable next to a jersey barrier or something that reflects sound.
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Old 06-08-2011, 12:47 PM   #13
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Quote:
Originally Posted by SSVader View Post
Careful, I have 22K, timing chain tensioner seized up and the timing guide screw sheared off and I drive my car nice. Now I am paying to replace all the intake valves and possible a new head but that's after trying to change the timing chain tensioner while I read on this site its near impossible to jump timing and it did. I also have an 06 ss/sc.
I remember reading that people were just taking out the tensioner and screwing the new one in.....while it was still collapsed . I'm suprised that they got away with doing it that way and did jump a tooth . I took the valve cover off and tapped the tensioner so it would set rather than take that chance on my LSJ. Mine went at 18K IIRC.
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Old 06-08-2011, 01:39 PM   #14
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Quote:
Originally Posted by rukkee View Post
I remember reading that people were just taking out the tensioner and screwing the new one in.....while it was still collapsed . I'm suprised that they got away with doing it that way and did jump a tooth . I took the valve cover off and tapped the tensioner so it would set rather than take that chance on my LSJ. Mine went at 18K IIRC.
The new style requires no tapping, and no setting. Nothing.

You must have used the old style tensioner.
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Old 06-08-2011, 01:58 PM   #15
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Quote:
Originally Posted by xxxxsh4d0wxxxx View Post
The new style requires no tapping, and no setting. Nothing.

You must have used the old style tensioner.
Nope.... I used the revised one . The instructions from GM stated it needed to be released and even had Pic's of the new one in GM SI.
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Old 06-08-2011, 02:37 PM   #16
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Quote:
Originally Posted by rukkee View Post
Nope.... I used the revised one . The instructions from GM stated it needed to be released and even had Pic's of the new one in GM SI.
The revised one, which is an LNF style one, doesn't have a way to lock it, so there is not a need to release it. If you banged on it, all it did was move a little lol.
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Old 06-08-2011, 03:32 PM   #17
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Were there 3 revisions? I had the 2nd one and I know it came collapsed .... cause i aciddentlly engaged it and it sprun out . I could have sworn it was different than the one i took out but maybe i put a new 1st rev. back in .... who knows ..... it's not mine anymore hehe.
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Old 06-08-2011, 05:37 PM   #18
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The original design was updated a couple times. Now they all use the LNF style hydraulic one that doesn't have that locking spring bullshit in it, just a c-clip that locks the pin in place and oil pressure keeps the chain tight. No setting or breaking or any of that crap.
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Old 06-08-2011, 06:26 PM   #19
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Quote:
Originally Posted by ItalianJoe1 View Post
The original design was updated a couple times. Now they all use the LNF style hydraulic one that doesn't have that locking spring bullshit in it, just a c-clip that locks the pin in place and oil pressure keeps the chain tight. No setting or breaking or any of that crap.
Ahh... gottch . I had the 2nd revision that had to be set with the valve cover off . I didn't know that they are using the LNF tensioner now . I replaced my LSJ's back in 07 so thats were the difference came from. Thanks for clearing that up!
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Old 06-08-2011, 06:57 PM   #20
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Quote:
Originally Posted by rukkee View Post
Ahh... gottch . I had the 2nd revision that had to be set with the valve cover off . I didn't know that they are using the LNF tensioner now . I replaced my LSJ's back in 07 so thats were the difference came from. Thanks for clearing that up!
Yeah, the newer one was sold from '08-up I believe. I bought one when I changed the head on my '06 car, back in later '07 I believe, and it was still the 2pc design. Not the same as the original, different shape to the casing and sealing areas, but still needed to be locked/released. The newer ones I deal with now on the motors i've built have all be LNF style.
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Old 06-08-2011, 09:42 PM   #21
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Good info Joe..... thx
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Old 06-08-2011, 11:24 PM   #22
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Quote:
Originally Posted by rukkee View Post
Nope.... I used the revised one . The instructions from GM stated it needed to be released and even had Pic's of the new one in GM SI.
You must have been mistaken.

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Originally Posted by ItalianJoe1 View Post
The revised one, which is an LNF style one, doesn't have a way to lock it, so there is not a need to release it. If you banged on it, all it did was move a little lol.
Right, Joe is correct.

This is the 2008+ version. The newest one. I am 110% positive of that.

Ecotec Timing Chain Tensioner 12608580 - Crate Engine Depot
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Old 06-09-2011, 03:56 PM   #23
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Originally Posted by xxxxsh4d0wxxxx View Post
You must have been mistaken.
]
At the time i did it ....in 2007 .... it was a revised tensioner . I haven't had the car for awhile so didn't know they started using the LNF tensioner as of late.
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Old 06-09-2011, 04:23 PM   #24
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At the time i did it ....in 2007 .... it was a revised tensioner . I haven't had the car for awhile so didn't know they started using the LNF tensioner as of late.
I believe there is only (1) revision. The old one 2005-2007, and the new one 2008-2010.
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Old 06-09-2011, 05:05 PM   #25
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Quote:
Originally Posted by xxxxsh4d0wxxxx View Post
I believe there is only (1) revision. The old one 2005-2007, and the new one 2008-2010.
There was a major design change to the LNF style, but i've seen more than one type of the early tensioners.
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Old 06-09-2011, 05:05 PM
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