Quote:
Originally Posted by oneav8or
Thanks blazes, I also have a coollant problem and like bandit I have no visable leaks of coolant and no evidence of dex-cool in the oil. Oil still has a brand new look almost clear and good oil smell, so I thought I ruled out intake/head gasket problem.
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This is a typical intake gasket leak. Its not bad enough to see it in the oil(yet), but its getting into the engine and causing your lifter rattle at start up. The coolant leaks past the gasket(s), and runs down the lifter valley right on top of cylinders 1, 5 or 2, 6 lifters. Leaving it like this will damage those lifters. But for sure though, its intake gasket starting to leak.
I'll say it again, as I have used this stuff several times, and always have had a good outcome with it, if you can't get at the gaskets right away, run some GM oil supplement in your oil. It will help keep the lifters from rattling and in general help the engine, it has a good additive pack to supplement your oil's additive pack. I do not generally believe in adding anything to your oil, but this stuff does help.