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#1
12-24-2006, 12:42 AM
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4.8L losing coolant
Hey all
Got an '01 4.8L that's slowly losing coolant, apparently not an external leak and doesn't appear to be getting into the oil. Read up on the problem here on AF but noticed that the problem seemed more prevalent on the 5.3L. Is the 4.8L just as prone to head/intake gasket failure? Also, in testing for head gasket leakage, noticed some small bubbles (like carbonation bubbles) in the coolant reservoir with the engine running - they showed up once and never came back. A combustion leak test is in the works (as soon as I get my hands on one). Any other tests I can try? Thanks for any info.
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I'm not looking to be anyone's hero, I just want to enjoy my car. 
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#2
12-27-2006, 05:37 AM
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Re: 4.8L losing coolant
I was losing water where the water pump bolts to the block . It did not leak when it was hot , only after it cooled down . it got progressively worse over three weeks . I only had to install new gaskets . Rob
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2000 Trans Am six speed Blackbird .Fast enough stock! 2005 Grand Prix. 2005 2500HD Silverado 4x4 , Duramax!!!!!!! Lifted ,Pumped,Humped,Thumped! 1988 JEEP Cherokee: Lifted, Sons new toy.
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