Engine Oil Sludge Question Audi A4 2001!!!!
#12
Take off the valve cover and see how much sludge is in there. Try scraping some off (as gently as possible) with a screwdriver on a part that can get scratched (e.g. NOT the camshaft or any sealing surfaces). See how thick it is, etc.
#13
You will know it when you see it. In addition, it may also form a varnish-like coating on your camshafts and other parts, which will be somewhat shiny and dark in color.
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2001 Audi A4 has sludge (looks similar to oil) forming on the bottom of chassi near the exact middle
seattle_mariners
Audi A4
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11-05-2007 07:54 PM