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Old 11-13-2012, 10:13 PM   #7
OEM ///Member
Join Date: Nov 2009
Location: Fairfax, VA USA
Posts: 22,856
My Ride: 330CiC, M5, X5, E93
You would be surprised!!!

Also you can have oil leaking and not a bad air leak and you can have a bad air leak with no oil leaking!

Cracked valve covers are also another very common issue as well.

Do not discount the valve cover. A valve cover leak will likely not respond to a brake cleaner test very well, however, if you smoke test the crankcase you will find the valve cover leak quickly.
Solve your misfires, lean codes, rough idle -

Fuel pump failures -

Temp Info -

Hidden OBC Menu - Check Voltage, Temp, Fuel Level -

E46/E39 GM5 Door Lock Info -

Lower hose temp switch O-ring - BMW #13621743299
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