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Oil leak, but where is it from

E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.

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Thu, Oct-14-2010, 03:06:47 AM

#11

MPOWERD

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Quote:

Originally Posted by neurostudy

amazing. i went to advance auto here in peoria and bought a $5 bottle of UV dye that you pour into the oil and then a UV blacklight (flashlight with UV bulb). cost me $40 total. put in the stuff got the engine warm and crawled underneath to inspect. at first there was a big glob of green UV oil at the tranny seal and i thought ****. then i traced the green trail of oil all the way up to the dang CPV valve. looks like its time to change it. cheap way to diagnose! will let you know how it goes.

Only problem with your advice is that if the oil leak turns out to be major and/or oil loss is high, you can damage the engine by running it to heat the oil for your UV dye application.

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