Question about Cadillac SRX

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I am writing asking for help to address what I consider an unacceptable response from a Cadillac mechanic when asked to evaluate a valve-like noise coming from my 2008 SRX Cadillac NorthStar VVT V8 engine. I bought the vehicle used from Sam Swope Cadillac, Louisville, KY, w/ 28000 miles. The noise was mentioned to the sales person. No action taken. I had left the car at the dealership overnight so the engine would be 'cold' when an "engine specailist" rode with me. On acceleration from the dealers lot, there was the noise I had complained about, i.e. a valve rattle-like noise. The response from the mechanic when I asked "do you hear that noise". His response was "I hear the usual noise of these engines". It was obvious the mechanic was hearing the noise. With further dewcrption of the noise by me, the same response was repeated. The mechanic did make an interesting comment: something to the effect that amounted to - 'this engine had been forced into the enigine compartment space'. I was left with no plan for any action from the dealership. The noise does lessen after the engine warms up, but is still there upon acceleration, but diminished. In my estimation, the noise is from one or two valves; and seems to be from the left bank. The tag on the engine reads: JCA. 1OJCA L081120036 12596983; date coded 04/21/08 08:54. Please advise me. Paul Culbertson 113 Edgewood Way Pewee Valley, KY 40056

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I have a 2008 SRX Northstar. It makes the same noise as yours on startup, it lessens as the engine warms up. You can hear it on acceleration. The noise is from the VVT setup. All of the Northstars do it. I wouldn't worry about it. Give it good oil - Mobil 1 preferred, good gas - premium if possible, mid grade if you must, regular-never. Take care of the engine and it will last a long time. I've had three of them. Never had a problem.

Posted on Aug 05, 2014

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What type of gas are you running in the north star? what you describe sounds like a valve rattle from preignition what i would do 1rst is fill the car up with premium gas (93) octane it will be expensive but a lot cheaper than running to the dealership drive the tank till empty and then resume as you were if this solves your problem you just saved yourself a few hundred dollars if not go to someone like auto zone and have a diagnostic done to see if any codes are stored there may be something with the timing of the anti knock sensor could be bad i would try these steps first before spending all of my money at the dealership if all else fails you can call gm yourself and see if they are having similar complaints from other customers. hope this at least get you started on the right road.

Posted on May 18, 2011

  • Barry Clink
    Barry Clink Aug 05, 2014

    I have a 2008 SRX Northstar. It makes the same noise as yours on startup, it lessens as the engine warms up. You can hear it on acceleration. The noise is from the VVT setup. All of the Northstars do it. I wouldn't worry about it. Give it good oil - Mobil 1 preferred, good gas - premium if possible, mid grade if you must, regular-never. Take care of the engine and it will last a long time. I've had three of them. Never had a problem.

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