Spark plug question
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MBWorld Fanatic!
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From: 38° 52′ 51″ N || 94° 48′ 11″ W
'01 C320 || '14 Honda Pilot EX-L
Spark plug question
For all of you who know engines better than I do, I have a question. I changed my plugs today and on cylinder #1 I had oil on the threads and sitting down in the area where the plug goes in. There was not any oil on the electrode of the plug, and the rest of the cylinders were dry. It is an '02 coupe with the M111 engine and I was hoping for some insight. Outland? Anyone?
Thanks....
Thanks....
Super Member
Joined: Apr 2005
Posts: 716
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From: Alaska
Lexus
Not sure about your engine design but usually its the valve cover seal leaking oil down into the spark plug hole. Overhead cam engines usually have a O-ring type gasket for each spark plug. If it leaks too much it will cause a misfire.
Scott
Scott
Thread Starter
MBWorld Fanatic!
Joined: Mar 2004
Posts: 2,326
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From: 38° 52′ 51″ N || 94° 48′ 11″ W
'01 C320 || '14 Honda Pilot EX-L
Originally Posted by MBTECH2003
Not a do it yourself job, special tool required as they are almost pressed in and out.
Originally Posted by mleskovar
Have you tried tightening the valve cover? Be careful.
