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Thread: problems bolting the thermostat housing back up..

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    Default problems bolting the thermostat housing back up..

    So i changed my thermostat last night and flushed the radiator while i was at it, but then it came time to bolting the thermostat housing back on, and one of the bolts won't tighten anymore(it's too loose to get a good seal). the threads are stripped in the hole, not the bolt. Any ideas on what i should do?

    I have the 4.0 engine by the way if someone wanted to know, and it's the lower of the two bolts that i can't get to tighten. Has anyone else experienced this problem?
    Last edited by ckato4477; 01-26-2010 at 10:03.

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    Free at last... ColoFreeJeeper's Avatar
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    I just helped changed a tstat on a buddy's 4.0 about 2 weeks ago but it went back together smooth. It seems that your only solution is to heli-coil the hole in the head. It's not terribly difficult to do, but easy to mess up. Good luck.

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    yeah i was thinking of retapping it to the next larger size, but it'll be a pain in the butt to do because i have to remove the fan and shroud to have enough room to work...

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    Junior Member Madmacc's Avatar
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    HeliCoil is pretty much the only option. Utilizing the original bolt find the correct helicoil. Some kits come with correct drill bit and tap for installation of the helicoil.
    "An army of asses lead by a lion is far better than an army of lions lead by an ass."

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    heli coil is where its at....dont re thread aluminum imoho either use an insert or heli coil...its cheap and works great
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    really so the heli coil is that good huh? well last night i went to the local autozone and didn't find it. It's my DD, so i don't really have time to wait for shipping, so here's what i did. I bought some JB weld, applied some to the inside of the bolt hole with a q-tip(enough to make a thick layer), and i'm waiting for it to cure so i can retap it to the same bolt size.

    problem i saw with using the helicoil is that it would be a huuuuuge PITA to get a drill in between the engine and radiator to get to where i needed to drill it out.

    hopefully when i retap it it will hold.

    thanks for the suggestions guys.

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    Free at last... ColoFreeJeeper's Avatar
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    Quote Originally Posted by ckato4477 View Post
    really so the heli coil is that good huh?...

    problem i saw with using the helicoil is that it would be a huuuuuge PITA to get a drill in between the engine and radiator to get to where i needed to drill it out...
    Yes, it's the only way.

    Unfortunately, gotta remove the radiator.

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    Snow Jeeper treefrog's Avatar
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    Get yourself a 90 degree drill or a 90 degree adapter for a regular drill. It'll fit in there.
    treefrog

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    Quote Originally Posted by treefrog View Post
    Get yourself a 90 degree drill or a 90 degree adapter for a regular drill. It'll fit in there.
    ahhhh, great idea, i'll try that next if this whole jb weld thing doesn't work out.

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    Its a bit late now. However, I have had luck in using a bit longer bolt for the hole. Sometimes the threads will be screwed towards the outside of the opening, but remain intact deeper inside the hole.

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