Engine knock

[pieter1]

So I bought a 2001 996 with a knock. Thinking it's a IMS but here is what I have found thus far. Pulled the tranny [tiptronic] was a challange inspected the IMS looks perfect and is a double row no damaged seal turns like a new one. Inspected the oil filter no metal but looks like it was on there for 100k miles. Then pulled the pan omg I have never seen anything that bad the whole bottom was filled with thick sludge looked like tar. But no metal anywhere at all. So is the knock caused by bad oil/sludge. Has any one had experience with knocking due to bad oil or lack of maintenance. Car has 140k.

[monteolsen1]

Hi,

I can only offer one bit of advice: try changing the oil a couple of times over the next few thousand miles to see if that alleviates the problem. Do you have maintenance records to see exactly what the previous owners did?

Good luck.


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[pieter1]

Thanks for the advice.