metal ring with new Autolite spark plugs???? - JeepForum.com
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Unread 01-28-2010, 05:01 PM   #1
purplepig
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metal ring with new Autolite spark plugs????

my new Autolite APP 985 plugs came with a metal ring. I have never seen this before. Is it some type of gasket I am supposed to use??????

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Unread 01-28-2010, 05:02 PM   #2
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Originally Posted by purplepig View Post
my new Autolite APP 985 plugs came with a metal ring. I have never seen this before. Is it some type of gasket I am supposed to use??????
yes. its a lock washer.
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Unread 01-28-2010, 05:05 PM   #3
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ok thanks!
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Unread 01-28-2010, 05:18 PM   #4
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i thinks a crush washer, to seal up. not a lock washer, why would you want to lock your plugs in?? Ive never had a spark plug back out.
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Unread 01-28-2010, 06:02 PM   #5
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That makes sense. I was kind of wondering because I can't see how a spark plug would just come out.
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Unread 09-13-2010, 09:15 AM   #6
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which way are you supposed to install the washer?
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Unread 12-01-2011, 12:56 PM   #7
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Which way does the washer go in? Or does it matter?
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Unread 12-01-2011, 12:59 PM   #8
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i did mine this past weekend and put the flat side toward the plug
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Unread 12-01-2011, 01:00 PM   #9
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which way are you supposed to install the washer?
Between the plug and the head works for me. It's a simple crush seal, don't over think it.
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Unread 12-01-2011, 01:14 PM   #10
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i just called Autolite and they said they can go on either way, but their preference would be for the larger/flatter end to go toward the plug. Hope this helps ya out!
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Unread 12-01-2011, 01:25 PM   #11
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That's kind of what I figured. Thanks for the info!
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Unread 12-01-2011, 01:30 PM   #12
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Originally Posted by lumpster View Post
Ive never had a spark plug back out.
I recently learned its a larger problem on aluminum head engines. A friend of mine blew a plug out of a Ford 5.4 Tritan engine ~2 weeks ago...plug backed out till it finally ripped all the threads out of the aluminum head on a compression stroke, while driving down a country road . His mechanic found three others about to go. apparently the cause is heat cycling + improper plug torque + no loctite...and Ford makes a heli-coil specifically for this issue. so...torque your plugs to spec!
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Unread 12-01-2011, 01:36 PM   #13
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Originally Posted by Unlimited04 View Post
I recently learned its a larger problem on aluminum head engines. A friend of mine blew a plug out of a Ford 5.4 Tritan engine ~2 weeks ago...plug backed out till it finally ripped all the threads out of the aluminum head on a compression stroke, while driving down a country road . His mechanic found three others about to go. apparently the cause is heat cycling + improper plug torque + no loctite...and Ford makes a heli-coil specifically for this issue. so...torque your plugs to spec!
Aluminum heads can cause loose plugs if you don't stay on top of them. I had a '74 VW in Alaska. There were a lot of Bugs up there but most of them got parked in the winter. I couldn't park mine. The aluminum heads and steel jugs did the same thing. Different heating/cooling rates caused the head bolts to loosen. I had to torque them down about once a week.
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