What spark plug gap on the 4.0L? - JeepForum.com

 
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post #1 of 7 Old 10-06-2011, 01:41 PM Thread Starter
AnonymousD
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What spark plug gap on the 4.0L?

I can find my Chiltons OR my Haynes manual and I can seem to really find anything searching around. So what should I gap them to?

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post #2 of 7 Old 10-06-2011, 02:03 PM
dillonjm
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IIRC its .035

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post #3 of 7 Old 10-06-2011, 05:41 PM
rkham11
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.035 is correct
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post #4 of 7 Old 10-06-2011, 05:49 PM
kahjeep
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^^^ what they said!
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post #5 of 7 Old 01-04-2013, 03:31 PM
maxthegi
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I knew that if I searched this forum I would find the correct gap somewhere. Thanks for y'alls help.
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post #6 of 7 Old 01-06-2013, 12:51 AM
seattle_yj
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Quote:
Originally Posted by maxthegi
I knew that if I searched this forum I would find the correct gap somewhere. Thanks for y'alls help.
Most of the higher end plugs are pre gapped. If you buy from napa they will tell you if it's pre gapped or not.
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post #7 of 7 Old 01-09-2013, 08:20 AM
TA-YJ
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Always double check the gap. Ive seen "pregapped" plugs that are like .015-.02 off.

1992 YJ 2.5L
Engine Mods:4.0L TB, Ford Design III 19lb Injectors, Firepower Ignition System, Ford TBird Electric Fan, Pacesetter Header, Magnaflow Cat, Dynomax Super Turbo Exhaust
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