Question about 2004 Chevrolet Monte Carlo

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Cold engine startup rattle

I have a 04 monte carlo with a 3400 v6 engine, 69 thousand miles. when the engine is cold the motor has a rattle for 1 min then goes away. car drives great no other problems, all techs tell me this is common for the gm 3400

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  • liteup_42 Jun 29, 2008

    Everyone keeps saying its piston slap, and that it wont hurt anything, and i even talked to GM about it

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If it is like a ticking sound then it is the fuel injectors, but if it is like a slight knock than goes away it is more than likely a cold start(which means the oil has all drained into the pan) which would cause a slight sound and then go away after a bit.

Posted on Nov 06, 2008

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The problem might be fuel injectors...

Posted on Jun 23, 2008

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