YOUR RESEARCHoil in coolant overflow ....?
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but no coolant in the oil ? shes a 1999 996 C2 with mileage in the high 60's. I've heard anything from cracked head, cracked block, and cylinder sleeve slipage, to heat exchanger (oil cooler) ? ANY IDEA'S OR EASY WAYS TO DIAGNOIS THE PROBLEM ? NO ENGINE LIGHTS, NO LEAKS, NO SMOKE, AND HAD A FRIEND PUT A SNIFFER IN THE TAIL PIPE AND ALL READINGS WERE PERFECT ?!?!?!
Could also be head gasket. Do a leak down test to be sure. This is different from a compression test. http://en.wikipedia.org/wiki/Leak-down_tester I would probably flush my coolant first, and see if oil returns. What is more common with a problem of this nature is excessive pressure in the coolant lines, caused by exhaust gasses leaking into the coolant system and adding additional (excessive) pressure.
unfortunately a leak down may possibly not detect head or block cracks.
t t t
Given that it's a '99, there is a 'history' of cracked heads on the early M96 blocks http://www.autofarm.co.uk/pdf/Total911_July06.pdf Best of luck!
thank you very much. was just contacted by the indy and was told that its the cooler. was pressure tested and leaking
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unfortunately it wasnt the cooler...pissed away another $700....
So did they find what it actually was?
yet to be determined. cooler waas replaced and no issue for about 4k miles then the oil re-appeared in the coolant tank
The coolers washers,rubber gromets? can cause this.
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