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1998 Pontiac Firebird Question: I have an oil leak and went to empty out my oil and found water mixed into the oil



Stuntstar30, 3.8L V6, Mims, FL, October 06, 2010, 21:52

The oil leak was coming from underneath the oil pan and under the passenger side of the engine. I bought dye to see where it was and emptied out my oil and when I went to jug the used oil notices water/coolant in it cause it was seperating. The engine is a new crate engine from autozone and is only under 3 years and some months old. Any idea what this is from. Please help me thank you. The engine is clean and all I just don't know if I should put new oil in it and the dye and see something I don't want to chance ruining the engine.

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  • Answer #1

    October 06, 2010, 23:49

    You have a blown head gasket. You must be overheating engine. Do not drive it.

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    Visitor, October 07, 2010, 17:30

    Thats what I thought and the thing is the engine never overheated. iI guess I'm just going to have to replace them both and see. I drained out the oil yesterday and then today when I went to open the screw on the pan nothing but water came out. I haven't drove the car since monday when the radiator had a crack in it and was leaking out. I put a new radiator in it and then did the oil and thats when I noticed the water and coolant in the oil when it was draining out.

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    Visitor, October 23, 2010, 15:49

    It turns out it is the intake manifold the heads/ gaskets were fine. there was no problem with them

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    Visitor, October 25, 2010, 16:38

    Good. You got lucky, but the 3.8L engine is notorious for for blowing the head gasket nearest the firewall at around 100,000 miles. I had one come in that had a knock in the engine. Found out the water in the cylinder caused a hydro lock, which bent the piston rod. That little bend made the piston skirt hit the crankshaft.

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