hello im new to this site and was wondering if you guys could help me out.. i have a 94 jeep wrangler with the straight six 4.0 i blew a head gasket and i need a little help. whats the easiest way to go about this.. do i leave the intake connected to the head? or should i seperate the intake and the head... thanks for any advice you guys can give me!
i've done both. both have pluses and minuses. if you disconnect the hoses, and electrical connectors, unbolt the exhaust downpipe from the exhaust manifold, unbolt p/s pump and so on it all comes out together with the manifolds. makes it easier to reinstall the manifolds without hassle while the head is on the bench.
unbolting the manifolds in the jeep is fine to, then you can leave the exhaust together, and remove the intake manifold, then the head comes right out, this is also better if you are by yourself, it is pretty hard to lift the cast iron head and manifolds out together by yourself.
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I agree that it can be done either way, but it seems better and easier to me to unbolt the manifolds and disconnect everything, then unbolt the head and lift it out. BTW, see if you can find a machine shop to give the head a resurfacing before reinstalling. This may help prevent a recurrence of the blown gasket, and of course, be sure to follow the torque guidelines for the head bolts. Good Luck, and if you are so inclined, take some pics and post them as you go. It's always helpful to the next guy on here to learn from your job.
If you got a blown headgasket, you should always take it in and get it resurfaced before you reinstall it, something made it blow, they don`t just go out without something like a small warp or maybe if the person you got it from put a new gasket one and didn`t torque it properly, something caused it. Them things are torqued pretty tight
I like to unbolt everything and remove the head. I agree above resurface and get a good Felpro gasket. I'm a firm believer in Indian Head gasket sealer- it fills in any small imperfections that maybe between the two surfaces on either side as well. I like to take pic's of things when I take them apart for reference- just a habit and label all connections. This makes it a no brainer when reinstalling everything- especially, if it sits for awhile before you can get back to it.
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something that might help you out is sometimes the head bolts are a pain in the ars to get out, so before you tear everything apart let the jeep run for a little bit to warm up and loosen the bolts this will also help you ftom breaking the exhaust mainifold bolts been there done that, and make sure you get the head resurfaced