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Thread: timing chains

  1. #31
    curtc's Avatar
    curtc is offline Cadillac Owners Master
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    I'll take something that has essentially been in use since 93, and prefected over the years, over the 3.6 that came out in 04, to then be changed over to DI 4 years later, still with timing chain problems..also, I'll take a blown HG or half case leak over a busted timing chain any day.


  2. #32
    KRSTS Guest

    Re: timing chains

    NOT when GM stepped up to the plate and now warranties the timing chains for 10 years or 120K miles. HG and half case leaks not beyond original factory warranty.

  3. #33
    curtc's Avatar
    curtc is offline Cadillac Owners Master
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    Quote Originally Posted by KRSTS
    NOT when GM stepped up to the plate and now warranties the timing chains for 10 years or 120K miles. HG and half case leaks not beyond original factory warranty.
    Not for all of them, anyone with an 04-06 got screwed by the same problem, no warranty or reimbursement for those owners...and by extending the warranty that shows that GM knows they screwed up, but aren't willing to correct the flawed design...

    Timing chain breaks at freeway speed and kiss your engine goodbye...the N* will survive its flaws, the 3.6 won't be so fortunate.

  4. #34
    1BadCadSTS's Avatar
    1BadCadSTS is offline Cadillac Owners Connoisseur
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    ^game set match WINNER!

  5. #35
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    Re: timing chains

    I detest the Northstar...the LLT/LFX are ages ahead. But yes on the bypass valve, and the v8's have the issue as well. When we dissasemble the oil pumps it appears it is not the valve so much as the casting/maching flash/burr's. All they need to do is take a little more time in finishing after rogh machining and the bypass valves should not be that bif od an issue.


  6. #36
    EChas3's Avatar
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    Re: timing chains

    Unfortunately, all too often 'perfected' and 'obsolete' amount to the same thing.

  7. #37
    SC2150's Avatar
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    Re: timing chains

    So true.

  8. #38
    jimmbo is offline Cadillac Owners Fanatic
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    Re: timing chains

    Quote Originally Posted by dkozloski View Post
    FWIW, roller chains don't stretch like pulling taffy but they do wear at the pin joints. The links stay the same length but the assembly gets longer. At this point the sprocket and the chain do not match. The chain engages the sprocket farther and farther out on the teeth until the whole thing goes to hell. It's pretty clear at this point that the cam chain drive system design was botched and the designer is probably unemployed.
    He probably was, like almost all incompetent management, promoted and given a HUGE bonus for designing something on the CHEAP.

  9. #39
    8323matt's Avatar
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    Re: timing chains

    ktr-sb,

    Did you order this from your Dealer or off the web? If you did I would like to know what site. I changed my timing chains, tensioners, and guides before I was deployed and still made a whinning-groaning type of noise for about 30 seconds. Its kind of hard to explain the noise. But your answer to this makes perfect sense! Thanks man

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