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Old 06-20-2019, 09:31 PM
rollinn95z rollinn95z is offline
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Join Date: Jan 2009
Location: NC
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The only thing I see is for an oil pressure relief valve as seen in the attached pics. It's on the lower front of the motor; so I'll check it out. Bummer I can't get to your indy. Thanks for the input!

In the mean time, I bought returnable MAF and MAP sensors to try over the weekend.



Quote:
Originally Posted by Purplefade View Post
Just spit balling, but my initial thought was timing, leaning towards the Vanos, but sounds like you’ve been through those already.. what about the Vanos oil return valves? Again, spit balling, but I know in my N62 a sticky return valve can cause all kinds of havoc with the Vanos function and at idle, under load, oil pressure is generally lower which may exacerbate the situation.

That said - I don’t even know if the N55 has a Vanos oil return valve, but having the Vanos system it stands to reason that it would.

Man, if you were here in Cbus OH, I’d have the wiz-bang Indy for you... don’t know anyone in NC or SC though. But I’m sure the guys on here will!
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