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Old 09-30-2016, 11:26 AM   #1
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spark plug problem please help

my 04 mustang gt keeps shooting spark plugs out this is the second time this has happened do anybody know why this happens and why does it happen b/c its costing me a lot of money to pay people to re thread them so i can drive it need help asap
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Old 09-30-2016, 11:43 AM   #2
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Well the original issue is the spark plugs were over torqued when they were replaced and it stripped the threads out. Is it the same plug that keeps coming out or is it different each time?
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Old 09-30-2016, 12:32 PM   #3
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Different each time
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Old 09-30-2016, 12:57 PM   #4
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The plugs are being over torqued. You have aluminum heads and steel plugs. Steel is stronger than aluminum. You need to install them with anti seize and torque them down no more than 12 ft lbs (someone else needs to confirm that for me). The biggest problem is due to the small amount of threads that exist. There is not much for the plug to grab, and when you over tighten the spark plug it tears the threads out instead of tightening.
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Old 09-30-2016, 01:25 PM   #5
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Sounds like he is getting them rethreaded and then whoever is installing them is stripping them out again.
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Old 09-30-2016, 11:14 PM   #6
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Quote:
Originally Posted by jkeaton View Post
Sounds like he is getting them rethreaded and then whoever is installing them is stripping them out again.
no its a different one each time
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Old 10-01-2016, 06:40 AM   #7
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no its a different one each time
Get them all done at once then. Or the rest of them. As stated, someone overtorqued them.
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Old 10-01-2016, 08:47 PM   #8
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I've seen this problem with early 4V heads. I can only relate what I've read as I've never had this issue, even though I have early 03 heads.
The real problem as stated prior is the lack of threads on these mod motors. I don't think over torquing is your problem, its just inherent. I've always torqued my plugs with anti-seize to what feels like a ring washer sealing. These dudes aren't re- threading your heads but, inserting a helicoil to solve your issue. I would just get some really late, or aftermarket heads wit more threads and be done with it.
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Old 10-04-2016, 03:52 PM   #9
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Torque to 13 using antisieze. Use that on my 04 after blowing a plug and never had a problem afterwords.

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