should I buy an '08 to '10 CTS?

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Thread: should I buy an '08 to '10 CTS?

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    should I buy an '08 to '10 CTS?

    Hi all. I would like to get some advice on if I should buy a 2008 to 2010 CTS. I've read about the 3.6 timing chain issues, and it concerns me. I've seen a few '08 and '09's with under 50k for sale, and a few 2010's under 60k. Is the timing chain issue that bad? should I just wait for a 2010 + with a 3.0? thanks

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    should I buy an '08 to '10 CTS?

    Quote Originally Posted by mikesignal View Post
    Hi all. I would like to get some advice on if I should buy a 2008 to 2010 CTS. I've read about the 3.6 timing chain issues, and it concerns me. I've seen a few '08 and '09's with under 50k for sale, and a few 2010's under 60k. Is the timing chain issue that bad? should I just wait for a 2010 + with a 3.0? thanks
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    Last edited by Harry_Wild; 03-07-2016 at 12:23 AM.

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    Re: should I buy an '08 to '10 CTS?

    Americans are too stupid to check oil level and add oil between extended synthetic oil changes hence the issue is exaggerated.

    Fwiw...I have a 3.6 liter AWD 2008 CTS since new and it's been flawless. (Between 55 to 60k miles now if I remember correctly)

    The residual seems quite low so in my opinion you d be getting a great vehicle for very little money if I decided to sell it.

    The power of the 305 hp in the CTS is quite good.

    I'd highly recommend the 2008 to 20010 3.6 over a weak 3.0 liter.

    Jmo and good luck deciding.
    Last edited by JBsZ06; 03-07-2016 at 07:34 AM.

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    Re: should I buy an '08 to '10 CTS?

    I would not buy a timing chain suspect model without knowing the oil change history. Yeah, ideally if the original owner did 5-7K changes with synthetic, they'll probably be fine. If they used dino oil and followed GM's original OLM program (as one would expect) and push 10-12k changes, you're asking for an eventual headache.

    In '10 they supposedly enlarged the oil passages on the LLT and I think changed chain suppliers so you may have better odds.
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    Re: should I buy an '08 to '10 CTS?

    thanks for the replies--I guess I'm kind of old school in that I would never go over 5k on an oil change regardless of what the book says. I will be buying from a dealer so maybe they can give me a maintenance history.

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    Re: should I buy an '08 to '10 CTS?

    Quote Originally Posted by mikesignal View Post
    Hi all. I would like to get some advice on if I should buy a 2008 to 2010 CTS. I've read about the 3.6 timing chain issues, and it concerns me. I've seen a few '08 and '09's with under 50k for sale, and a few 2010's under 60k. Is the timing chain issue that bad? should I just wait for a 2010 + with a 3.0? thanks
    don't buy the 3.0L, no torque

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    Re: should I buy an '08 to '10 CTS?

    Little weap around water pump after 55k 60 k miles....

    Going to have to change it within the year I think. Probably just the seal but if I'm in there might as well change pump.

    Same thing on my 08 ls3 on my corvette.

    Neither one is an emergency as expansion tank level isn't changing. Just figured next oil change in a few thousand miles I'll do the job..

    I think the front headlights are a pain in the butt labor wise...that annoys me about the CTS....as the labor cost to change front light bulbs is insane. Have to take front bumper off to change the bulbs....(even daytime running lights which are always on)

    Changing day time running lights on one side of my cts will cost -300 dollars....which is ridiculous...

    Always change both daytime running lights whenever one side goes out is my tip, the bulb is cheap but the labor brutal.

    I believe gm extended timing belt converge to 10 years 120k miles,...but it's really people just didn't check oil level through extended oil changes ...and they didn't use Orem oil filters. Aftermarket oil filters flowed differently and the original precision reading from PCM was too exact on variable valve timing.
    Last edited by JBsZ06; 03-09-2016 at 08:15 AM.

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    Re: should I buy an '08 to '10 CTS?

    JB, you have to stop blaming the customer. It's not their fault.

    There were 2 serious miscues on GM's part that contributed to this.

    1. The oil passages in the head that lubricate the chains were undersized, and were enlarged in '10 to improve flow.

    2. The original OLM algorithms on the DI LLT matched the older port injected engines. However we know DI is much harder on oil and tends to lead to more fuel dilution and quicker degradation. So customers were following an insufficient OLM and changing based upon it's recommendations, which they had been told over and over were to be treated like Bible since GM's engineers designed it.


    Here's how GM addressed it: 1. 10/120k special coverage 2. new PCM programming to both shorten the OLM duration and widen the spec on the cam position sensors before throwing a code 3. moving to a dexos spec synthetic blend requirement starting in '12 4. reportedly switched chain suppliers in '10 and 5. enlarged oil passages in '10. All of those actions suggest poor engineering judgement on GM's part and explain the rash of failures from '07-'09, and on the Lambda forums more than a few '10s are popping up now (and they are not covered by the special coverage).

    You're saying if someone had an early year LLT, and the followed the OLM to a T with dino oil, and stretched their chains it's because they didn't check oil level or used a non-OEM filter? Please.
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    Re: should I buy an '08 to '10 CTS?

    I had an '07 SRX and my mom has an '08 CTS. Fine cars, both of 'em.
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