Timing Chains still Failing on 3.6 Engines

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Thread: Timing Chains still Failing on 3.6 Engines

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    Timing Chains still Failing on 3.6 Engines

    As the original owner of a 2012 Traverse, I am a bit upset that my timing chains failed at 64,000 miles. My Brother went through this at 70,000 on his 2008 Traverse. I had read when he had problems with his vehicle that GM knew in 2008 they had an issue with the chains. I read the reason was poor chains, combined with an oil change schedule that was set too long between changes by GM. The word was a new vendor was found for the chains with better quality, and the oil change interval was dialed back to avoid this situation going forward. The story was if you had a 2010 or newer 3.6, this problem was solved. When my check engine light came on, I was not expecting to hear the chains were the issue, but that was the phone call I received from my dealer. I asked the service rep why my 2012 was having these issues and was told I was not alone, they are seeing more and more 2011's and 2012's. So obviously this issue has not been fixed. This is stunning to me as this engine was designed to be used in Cadillac and is currently being used in about every vehicle GM has. I have changed my oil every 4 to 5000 miles, never exceeding 5000 miles so I'm not buying the oil issue, but I did see on my service ticket that my screens were filled with sludge. My question is what is the real issue here, lack of oiling? Design error? Isn't it time to tell customers the truth? Are there any warranty extensions on these vehicles with these engines? Seems to me there should be. I like many things about my Traverse, and was considering purchasing another one, but I will not do that with these unresolved engine issues. My vehicle was in the shop over a week and I picked it up this morning. After driving it I discovered it's leaking anti freeze and had to return it to the dealer.
    Last edited by Materialman; 01-20-2015 at 07:48 PM.

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    Re: Timing Chains still Failing on 3.6 Engines

    Quote Originally Posted by Materialman View Post
    As the original owner of a 2012 Traverse, I am a bit upset that my timing chains failed at 64,000 miles. My Brother went through this at 70,000 on his 2008 Traverse. I had read when he had problems with his vehicle that GM knew in 2008 they had an issue with the chains. I read the reason was poor chains, combined with an oil change schedule that was set too long between changes by GM. The word was a new vendor was found for the chains with better quality, and the oil change interval was dialed back to avoid this situation going forward. The story was if you had a 2010 or newer 3.6, this problem was solved. When my check engine light came on, I was not expecting to hear the chains were the issue, but that was the phone call I received from my dealer. I asked the service rep why my 2012 was having these issues and was told I was not alone, they are seeing more and more 2011's and 2012's. So obviously this issue has not been fixed. This is stunning to me as this engine was designed to be used in Cadillac and is currently being used in about every vehicle GM has. I have changed my oil every 4 to 5000 miles, never exceeding 5000 miles so I'm not buying the oil issue, but I did see on my service ticket that my screens were filled with sludge. My question is what is the real issue here, lack of oiling? Design error? Isn't it time to tell customers the truth? Are there any warranty extensions on these vehicles with these engines? Seems to me there should be. I like many things about my Traverse, and was considering purchasing another one, but I will not do that with these unresolved engine issues. My vehicle was in the shop over a week and I picked it up this morning. After driving it I discovered it's leaking anti freeze and had to return it to the dealer.
    my 09 G8 made dinner out of its chain )-:
    I believe your traverse uses the "OLDER" LLT DI engine as used in the VE "commie" and I thought the guides for the timing chains where changed in the "new" LFX engine

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    Re: Timing Chains still Failing on 3.6 Engines

    This should be fun for the folks that buy one of the new midsize twins with the Lfx engine.Like the new gm,same as the old gm...
    Old Phart

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    Re: Timing Chains still Failing on 3.6 Engines

    To bad GM doesn't cover mechanical non-safety problems as they cove safety related issues.

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    Re: Timing Chains still Failing on 3.6 Engines

    my 2004 CTS ate its chain. I did all oil changes myself based on the recommended DIC, just didn't keep good enough records receipts, and it failed. They claimed they fixed it in my build, stating my car was 'not effected'. The dealership even assisted me in how and where to go to get ammunition for my debate. Still GM turned their head.
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    Re: Timing Chains still Failing on 3.6 Engines

    Between timing chain problems and carbon buildup, is there ANY reason to buy a GM vehicle with the 3.6?

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    Re: Timing Chains still Failing on 3.6 Engines

    I have not heard of any failures on the newer iterations of the LFX yet. Let the warranty replace it and move on with life.

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    Re: Timing Chains still Failing on 3.6 Engines

    I believe my wife's 2009 Outlook has a letter stating ten year 120,000 mile extended warranty on timing chain issues.
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    Re: Timing Chains still Failing on 3.6 Engines

    We have an '07 Acadia and the chain was just replaced at 153000 miles. We had it replaced right before it completely failed.

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    Re: Timing Chains still Failing on 3.6 Engines

    Quote Originally Posted by lohchief View Post
    This should be fun for the folks that buy one of the new midsize twins with the Lfx engine.Like the new gm,same as the old gm...
    Yet another reason I would have preferred the 4.3L V6 engine in the mid size trucks.

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    Re: Timing Chains still Failing on 3.6 Engines

    Quote Originally Posted by 61BelAir View Post
    Yet another reason I would have preferred the 4.3L V6 engine in the mid size trucks.
    Do you have evidence of the newer LFX engines suffering from these timing chain issues? You could just as easily say you prefer not to have the 4.3 because of the long documented heritage AFM issues.

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    Re: Timing Chains still Failing on 3.6 Engines

    With most cars, timing chain replacement is regular maintenance but somehow GM is not allowed to ever need a new timing chain. At least the car, often, "tells" you when it needs a new chain before damage is done.

    It's the LFX 3.6 that's supposed to go longer between maintenance.

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    Re: Timing Chains still Failing on 3.6 Engines

    Quote Originally Posted by NeverEnough View Post
    With most cars, timing chain replacement is regular maintenance but somehow GM is not allowed to ever need a new timing chain. At least the car, often, "tells" you when it needs a new chain before damage is done.

    It's the LFX 3.6 that's supposed to go longer between maintenance.
    A timing chain is not regular maintenance. A timing belt is, but most manufacturers have moved to chains. I have never owned a vehicle that needed a timing chain replacement, including 200K mile examples.
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    Re: Timing Chains still Failing on 3.6 Engines

    Why is it only the 3.6 in the acadia,traverse,enclave that has the issue and not the Camaro?

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    Re: Timing Chains still Failing on 3.6 Engines

    Quote Originally Posted by linton23 View Post
    Why is it only the 3.6 in the acadia,traverse,enclave that has the issue and not the Camaro?
    The LLT is an older version of the 3.6.

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