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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > reddish or rust powder on plugs



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      06-06-2012, 10:31 PM   #1
klaasjoe
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reddish or rust powder on plugs

Hey guys my 335 has been having problems for a while and when we thought we fixed it we didn't. Anyways my wife was driving and it started to shake and went into limp mode. So I took it to my new mechanic and he pulled the plugs (which were new) and they have a reddish or rust colored powder on them. I am thinking head gasket or turbos? Anyone have any idea?
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      06-06-2012, 11:13 PM   #2
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sounds like coolant?? so head gasket
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      06-06-2012, 11:28 PM   #3
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If you ran any octane booster with MMT then that can leave a red residue on your plugs.
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      06-07-2012, 01:05 AM   #4
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May have too agree about coolant. Check and remove oil cap to see if oil has been contaminated. Oil will turned milky brown if so.

Also tech may use a bore scope or remove intake to see condition of valves (see any reddish material is on valves). This may indicate the extent of problem and you may have head gasket problem.
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      06-07-2012, 10:10 AM   #5
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Quote:
Originally Posted by Ilma View Post
If you ran any octane booster with MMT then that can leave a red residue on your plugs.
^That.
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      06-08-2012, 07:45 PM   #6
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Been running Arco fuel? Long ago I ran that crap (even the Premium) and would see that type of fouling.
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      06-09-2012, 12:25 AM   #7
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No always run chevron and no octane booster. My mechanic thought it might be a head gasket but then he was thinking why would all the plugs be reddish.he called his buddy at the BMW dealer and asked him and the guy told him it has to do with the trial bovand the jb4. I don't know what to do now.
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      06-09-2012, 11:09 AM   #8
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Replace the plugs and drive it and see if it resurfaces? Maybe it was bad gas or something along those lines.
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      06-09-2012, 01:24 PM   #9
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I had the same thing when I changed my plugs. Cylinders 4, 5, and 6. It got progressively worse going from cyl 4 to 6. There was even some orange color on the piston face in those cylinders. I was going to run the new plugs for a few thousand miles and then pull them and check again.

On other platforms, this is commonly caused by octane booster, but I've never run octane booster either.
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      06-09-2012, 04:30 PM   #10
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tech is probably right, the blow off valve caused it...lol
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      06-09-2012, 04:33 PM   #11
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Maybe whoever did the plugs used copper antiseize? That's common amongst some EU shops after finding out the regular antiseize can cause grounding problems.
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      06-10-2012, 01:05 AM   #12
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No anti seize used and this is the second set of plugs. It is my wife's daily she has said she has been smelling exhaust or smoke. Could this be from the turbos? If they are leaking and they are water cooled maybe explains reddish color on plugs
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