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View Full Version : 4.0 head swap



robertf03
06-02-2002, 01:30 PM
got a 91 4.0 HO head for 30 bucks at pick and pull yesterday for my brothers 258 YJ. supposed to add around 40 hp to the I6

robertf03
06-02-2002, 01:30 PM
it even has the extra water jackets already filled. I'm a bit concerned about that since there is no reason to do that to a 4.0

mark
06-02-2002, 05:10 PM
Better have that thing checked for cracks. It looks like someone aborted that very same procedure after filling the water jacket.

-Mark

BMFScout
06-03-2002, 11:34 PM
the worst feeling in the world is to spend money on headwork, get it in the car, fire that mother up (blub, blub, open headers, blub, blub) then proceed to fog the driveway with water vapor. You stand back and yell ****, then get to replace it with new heads. Get it checked out, and if you let someone work on it, say to put hardened seats in it and 2.02 valves, make sure they know wtf they are doing.
voice of experience,
Jimmy

robertf03
06-05-2002, 01:15 PM
i was planning on having it hot tanked and magnafluxed. Wheres a good place to get that done around Dallas? I was just going to take it to city motor supply and see if they can do it, but I'd rather take it to a specialty shop rather than a mass produced rebuilt motor place.

BMFScout
06-05-2002, 01:24 PM
I think Plano Auto can do it. I know they have a hot tank, and they can do a pressure test, but I am not sure about the magnafluxing part. If you see a pos Isuzu running around Plano with parts in the back it is me. I am currently employed as one of their parts bitches. gotta love summer jobs, but it beats the hell out of working nights, weekends, or doing actual labor in the sun :D

robertf03
06-05-2002, 01:25 PM
sweet, so can you hook me up on a hot tank deal then :D

BMFScout
06-05-2002, 01:27 PM
Flem the jew, always working an angle...

robertf03
06-05-2002, 01:36 PM
you bet, its not even for my Jeep though, so technically its an angle of an angle, or maybe the angle of the dangle

well I need to go get back to drinking beer and using metric tools on the crapanese vehicle

AgDieseler
06-06-2002, 03:54 PM
Trinity Castings in Dallas can do all of the stuff you mentioned. That's where I got all the machine work done on my engine.

StevenAg03
06-06-2002, 09:33 PM
he dont want to take it to a diesel specialty shop......oh wait....you said the worked on your motor....then they can do gas stuff...http://offroadrepublic.com/fj40/pics-funnies/forum-thefinger.gifhttp://offroadrepublic.com/fj40/pics-funnies/forum-thefinger.gifhttp://offroadrepublic.com/fj40/pics-funnies/forum-thefinger.gifhttp://offroadrepublic.com/fj40/pics-funnies/forum-thefinger.gifhttp://offroadrepublic.com/fj40/pics-funnies/forum-thefinger.gif