The Ford Barn

30AAFord · 06-20-2010, 07:29 PM

Just put a NOS set of AC spark plugs in an engine (old plugs needed cleaning and I didn't have the time at the moment). After running for awhile, I noticed oil seeping out around the #1 and #2 plugs. Plugs weren't loose and there was no seepage (that I was aware of) around the old plugs. Can there be that much discrepancy in plug fit?

Larry Brumfield · 06-20-2010, 08:10 PM

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Yes, ..... when you consider the wear on the threads in the head.

Moreover, that compression washer isn't the best seal in the world either. Ever left an engine out in the weather?

Larry B.

06-20-2010, 07:29 PM	#1
30AAFord Member Join Date: May 2010 Location: Massachusetts Posts: 72	Leaking Spark Plugs Just put a NOS set of AC spark plugs in an engine (old plugs needed cleaning and I didn't have the time at the moment). After running for awhile, I noticed oil seeping out around the #1 and #2 plugs. Plugs weren't loose and there was no seepage (that I was aware of) around the old plugs. Can there be that much discrepancy in plug fit?

06-20-2010, 08:10 PM	#2
Larry Brumfield Senior Member Join Date: Jun 2010 Posts: 351	Re: Leaking Spark Plugs Sponsored Links (Register now to hide all advertisements) Yes, ..... when you consider the wear on the threads in the head. Moreover, that compression washer isn't the best seal in the world either. Ever left an engine out in the weather? Larry B.