Quote:
Originally Posted by abporsche1
Bronco answers my 2nd & 3rd question, thanks. The time it takes will be relative amongst the many good Porsche shops around here.
My initial question was because of milkshake sludge in the oil filler - thinking a failing AOS can cause it. So there's another question, what causes the sludge?
Last weekend I did the vacuum test side by side with a 2003 C4S with a known good AOS, both were sucking similar and were relatively easy to remove.
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Oil sludge is possibly engine oil and coolant intermix. I’d investigate that before buying an AOS.