Why do spark plugs loosen?
Fleet Mechanic
Joined: Jul 2004
Posts: 1,552
Likes: 0
From: va
Use a Anti-Seize Compound like Never-Seez. Maybe some else has a better brand name for anti seize compound.All your plugs get loose? What brand of spark plugs are you using? This never happened to me, never heard of this happening.
Mountain Pass
Joined: Jul 2004
Posts: 245
Likes: 41
i get this problem too. when i bought my truck i noticed on inspection that i had loose plugs. tightend them backup and they have not come loose within the last couldple of thousand miles. but i have no idea why they would turn out.
Elder User
Joined: Jul 2004
Posts: 911
Likes: 2
From: Northern Virginia, USA
I changed my plugs a few weeks back, and most were not real tight, and one was not even HAND TIGHT. Autolite 5125's. The threads were rusty, too. I gave the new plugs a little coat of oil to stop the rust, and snugged them down (also Autolite 5125s, came up recommended in the Advance Auto computer).
The oil on the threads may have been a bad idea. I'm going to pull and inspect the plugs soon, and hopefully an R&R will clear up any oil-carbon fouling on the threads that may or may not be hurting ignition.
Why would they turn out? My engine was running real lean for a while, and the added heat/vibration might have had something to do with it.
The oil on the threads may have been a bad idea. I'm going to pull and inspect the plugs soon, and hopefully an R&R will clear up any oil-carbon fouling on the threads that may or may not be hurting ignition.
Why would they turn out? My engine was running real lean for a while, and the added heat/vibration might have had something to do with it.
Post Fiend
Joined: Nov 2001
Posts: 14,947
Likes: 6
From: Topsfield, MA
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Elder User
Joined: Jul 2004
Posts: 911
Likes: 2
From: Northern Virginia, USA
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