Spark plug washers
Knuckle Bandage Sales Rep
Joined: Feb 2011
Posts: 3,678
Likes: 1,248
From: Maine
Ed, I think you are asking a good question. I just checked through the Ford Service Manual (Book 3644-50-E May 1,1950) and looked for every reference to spark plugs. I saw no mention of plug washers or gaskets. Just a torque specification of 24-30 ft-lbs. I even checked the interwebs to see if I could see a picture of an original Ford factory replacement spark plug and look for a washer. I did not see any pictures so it is still a mystery to me.
Tom
Tom
Believe Nothing
Joined: Jun 2004
Posts: 7,519
Likes: 403
From: W. Central FL.
What Ross said above in reply frame #5. I've never purchased a plug with the flat sealing surface that did not have a sealing crush washer. I've changed at least my fair share of plugs as it was common practice to change plugs at 10-12K miles back when. Ford went to the tapered plug sealing surface that did not require a crush washer when they went to the Y block. I believe the 223 had the tapered sealing surface.
BTW, I f the plugs are torqued to specs, the washer does not distort, at least the old Champions did not.
BTW, I f the plugs are torqued to specs, the washer does not distort, at least the old Champions did not.
Last edited by raytasch; Jan 16, 2022 at 07:15 PM. Reason: Error in typing
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