Threads stck in cylinder head
05-08-2012, 09:42 AM
#7
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Year: 1990
Model: Cherokee
Engine: 4.0
Pull the head. (Last resort)
Post a nice clear high resolution pic.
Which cylinder? how old is the plug? using the right size socket? Got any others out, or is this the first one you tried?
Post a nice clear high resolution pic.
Which cylinder? how old is the plug? using the right size socket? Got any others out, or is this the first one you tried?
Last edited by hankthetank; 05-08-2012 at 09:44 AM.
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05-08-2012, 10:39 AM
#9
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Year: 1995
Model: Cherokee
Engine: 4.0 HO inline six
Yes I know how to remove spark plugs ! I changed 3 already but 3 won't come out ! I think they might be cross threaded not sure but I can't get them out and I don't want to pull the head
05-08-2012, 10:45 AM
#10
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Year: 1991
Model: Cherokee
Engine: I-6 4.0 HO
...how does a spark plug get that tight in the head without breaking the actual plug? And I thought the threads of plugs were stainless or rust preventive or something?? Did someone impact them in there?
05-08-2012, 01:02 PM
#12
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Year: 1998 Sport
Model: Cherokee
Engine: 4.0
Just messing with you.
Just try like the others said. Spray down the plugs wit PB Blaster. Then bring the engine up to temp. Give that a try before pulling the head. Let us know if it works.
05-08-2012, 01:40 PM
#13
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Year: 2015, 2012
Model: Grand Cherokee (WK2)
Engine: 3.6L
2. Bearing down on them instead of just turning in a circle trying to get them out, thereby galling the threads. This happens all the time.
3. No anti-seize put on them when installed.
4. Been in there too long. Carbon fouled on inner threads. Rusted to the head.
5. All of the above.
05-08-2012, 05:48 PM
#15
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Year: 1995
Model: Cherokee
Engine: 4.0 HO inline six
Originally Posted by Dwestonxj
Let your motor get hot then carefully try to just break them loose..