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General E46 Forum
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Old 07-24-2013, 12:44 AM   #1
RedDevilAngelEyes
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Oil on spark plug thread.

Hey guys i recently pulled my spark plugs out to replace them. When i did all of them had oil on the threads. It was also burned on them, like the sprk plugs were in pretty bad shape. I also went with straight headers recently because my cats went out on me and now my car has blue smoke coming out the exhaust sometimes. Also it smells like straight gas when i drive. Any ideas.


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Old 07-24-2013, 01:34 AM   #2
Chrsb5
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Oil on spark plug thread.

Start with a valve cover gasket


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Old 07-24-2013, 01:36 AM   #3
Chrsb5
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Oil on spark plug thread.

http://forum.e46fanatics.com/showthread.php?t=886063


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Old 07-24-2013, 01:42 AM   #4
RedDevilAngelEyes
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Oil on spark plug thread.

A broken valve cover gasket will leak oil into the combustion chamber?


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Old 07-24-2013, 01:52 AM   #5
atinybug
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yep
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Old 07-24-2013, 01:57 AM   #6
RedDevilAngelEyes
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Oil on spark plug thread.

Allright awesome thanks for the help. I will get on it tomorrow. I will let u know what the gasket looks like


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Old 08-21-2013, 09:34 PM   #7
RedDevilAngelEyes
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Oil on spark plug thread.

So gasket was bad i changed it, but nothing changed. Any other ideas anybody?


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Old 08-21-2013, 10:02 PM   #8
2003silver330i
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If oil is not leaking down from above the spark plugs than the only other conclusion is it must be coming from the cylinders if the electrodes are covered in oil. It could be oil blow-by: http://www.bobistheoilguy.com/what-is-blow-by/
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Old 08-21-2013, 10:22 PM   #9
RedDevilAngelEyes
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Oil on spark plug thread.

So basically my rings are bad?


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Old 08-21-2013, 10:26 PM   #10
2003silver330i
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So basically my rings are bad?


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I don't know if it is valve seals and/or piston rings. If you could post a picture of the plugs it would be a tremendous help or identify them in these pictures: http://arrc.ebscohost.com/ebsco_stat...PARK_PLUGS.htm
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Old 08-21-2013, 10:35 PM   #11
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You're not gonna get oil on the inside of the cylinder from a leaking valve-cover gasket. That would imply your plug isn't sealing and you'd know if your plugs weren't sealed. If you're blowing lots of blue smoke all of a sudden, it's most likely your oil separator.
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Old 08-21-2013, 10:36 PM   #12
RedDevilAngelEyes
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Oil on spark plug thread.

Oil separator. How would I check for that?


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Old 08-21-2013, 10:38 PM   #13
RedDevilAngelEyes
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Oil on spark plug thread.

Also the spark plugs have burned and fresh oil on them.


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Old 08-21-2013, 10:38 PM   #14
2003silver330i
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I forgot about the CCV as another symptom of fouled plugs. Good catch Mike.
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Old 08-21-2013, 10:38 PM   #15
RedDevilAngelEyes
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Oil on spark plug thread.

I also recently changed the cvv because i thought that was it but it wasnt.


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Old 08-21-2013, 10:45 PM   #16
2003silver330i
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When you changed the headers did you notice any of the engine exhaust passages caked with oil?
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Old 08-21-2013, 10:56 PM   #17
RedDevilAngelEyes
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Oil on spark plug thread.

No but my cats were done because of all the oil that had burned up inside them


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Old 08-27-2013, 10:05 AM   #18
RedDevilAngelEyes
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Oil on spark plug thread.

Could it be the Valve Stem Seals???


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Old 08-27-2013, 10:13 AM   #19
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Same thing here; the gaskets were good (not like there was really anything in the wells), but the threads themselves had oil on them. Some of it solidified too, so I had to do my best to clean it and pray that the threads didn't get bent

I haven't really heard of M3 CCVs failing, but I should probably give replacing it a shot
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Old 08-27-2013, 12:03 PM   #20
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Quote:
Originally Posted by RedDevilAngelEyes View Post
Hey guys i recently pulled my spark plugs out to replace them. When i did all of them had oil on the threads. It was also burned on them, like the sprk plugs were in pretty bad shape. I also went with straight headers recently because my cats went out on me and now my car has blue smoke coming out the exhaust sometimes. Also it smells like straight gas when i drive. Any ideas.


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YOU REMOVED THE CATs?!

In California, and you removed the CATs? You made a very costly mistake, my friend. This is nearly a Death Penalty offense here, but you will languish in San Quintin for 40 or 50 years before they finally throw the switch, so your life will be long. Your world will be small, but your life will be long.
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