Quote:
Originally Posted by fj1200
Going back to my days at the dealer now. We did MANY head gaskets on 12V v6 engines, was always oil leakage. Usually they leaked when piping hot at RPM. The place to look is in the valley between cylinders 4 and 5 (front two of your passenger side). Get it good and hot, clean aggressively and hold engine at 3K revs. Watch for oil forming at head to gasket joint.
The other common failure is the oil cooler, check the overflow bottle for oil residue. Due to differential pressures the two fluids go either way (kinky, no?). When the engine is running the oil pressure is higher so oil migrates to the coolant. After shutdown the cooling system pressure is higher so coolant migrates into the oil.
Hope this helps, Cheers.
Dan
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Guess what now the weather has decided to warm up a little I decided to throw a new oil cooler on today prior to pulling the engine out (I have a spare engine to put in) and it's solved the problem
Got plenty of other issues to sort out but at least at the moment this is one less headache...
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"Earl" 1998 2.8 V6 Cabriolet
"The Duke" 1997 2.6 V6 Cabriolet (Sold....sadly)
Project "Best of Both Worlds" 1995 S2 Quattro Cabriolet
