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Old 10-30-2009, 04:39 PM   #1
loweredfourpointsix
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Default stripped spark plug cylinder threads

I was leaving the DMV because i had just picked up my new custom license plates reading "slo 4 6", when heard a loud BOOM! followed by what sounded like a really bad exhaust leak. i pulled over and popped the hood and saw that the number 6 coil pack was way outta place and i could feel warm air coming out from there. the car probably thought ill show you "slo" mofo.. well i bought the extended warranty on the car so ford has had it for a week now and i dont think i will have it back by tonight which means i wont be able to run @ the street legal drags tomorrow =/
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Old 10-30-2009, 04:46 PM   #2
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LOL Welcome to the world of owning a Mustang!!!
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Old 10-30-2009, 05:04 PM   #3
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yea i hope it doesnt happen to my Tbird cuz it has the 4.6 too. is there any way to keep this from happening?
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Old 10-30-2009, 05:06 PM   #4
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nope, plugs are only to be toqured 7-8 ft-lbs, over tighting is the normal cause.
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Old 10-30-2009, 05:22 PM   #5
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7-8 lb/ft is too little and risks their backing out--the spec is 11 lb/ft, most plug manufacturers say 11-13 lb/ft...

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Old 10-30-2009, 05:26 PM   #6
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My bad cliffyk, Alldata states 11 ft lbs. I was thinking of some other engine we were working on last week.
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Old 10-30-2009, 05:30 PM   #7
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put some loc-tight on it and will never have this problem again. JK DONT DO THAT. Its going to happen again thats just the way mustangs work, unless you get after market heads.
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Old 10-30-2009, 05:39 PM   #8
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^^^lol^^^
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Old 10-30-2009, 08:08 PM   #9
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I guess it is a slo-4.6 now......Did you ever change the spark plugs or are they stock? Just curious if it was human error or they really just backed out by themselves.
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Old 10-30-2009, 08:09 PM   #10
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alright thanks guys =]
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