Spark Plug Torque?
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New User
Joined: Dec 2006
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Spark Plug Torque?
Greetings all, how much torque should be applied to correctly tighten a spark plug using a torque wrench. My truck just "threw" spark plug #2, luckly there is no damage to the threads and I can replace the plug. I replaced all spark plugs 4months ago with Buch platnimums. Tomorrow I will replace them all with Motrocraft. BTW, my truck is a 97 Ford 150, 5.4 Liter with 210,000 miles. Runs great, never had any problems until this spark plug incident. So, can someone tell me the correct torque for tightening spark plugs? Thanks for your response.
Last edited by PTMR2; Dec 26, 2006 at 09:04 PM.
Lead Driver
Joined: Sep 2006
Posts: 7,907
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For MC plugs, they say not to use anti seize because the threads are coated but I would use some if you don't change them all that often.
The torque spec is 7 to 14 lb/ft. I would use about mid value with anti seize.
The torque spec is 7 to 14 lb/ft. I would use about mid value with anti seize.
Postmaster
Joined: Nov 2006
Posts: 4,517
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From: SE Wyoming
You need to use the correct torque and no anti seize. from memory they are all between 14-17ft-lbs and are supposed to be done with an inch-lb wrench since the values are so low. If you keep them changed every 60K or so there is no need for anti seize and they shouldn't spit out from loosening up. For some reason Ford couldn't have 1 torque setting for all modulars all years they very by year and engine but are all in the 14-17 range IIRC.
