Stripped exhaust flange bolts!!
#2
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Year: 1999
Model: Cherokee
Engine: 4.0
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Dorman sells a kit for those bolts. Check with Advance, O'reilly Auto Parts. They're actually drive studs.
You have to hammer the old bolts out and hammer in the new ones. A PITA to get them out/in when the manifold is installed on the engine.
You have to hammer the old bolts out and hammer in the new ones. A PITA to get them out/in when the manifold is installed on the engine.
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Year: 1991
Model: Cherokee
Engine: I-6 4.0 HO
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Strange.. my '91 had just regular through bolts. I replaced them with Grade 8 bolts and nuts long enough to compensate a lock washer on each side. So far so good with a new downpipe seal.
#5
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Year: 1992
Model: Cherokee
Engine: 4.0L
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Mine is a 1990, guess they changed it that year.
I don't want to start smacking it with a hammer, think that would maybe crack it further upstream..
I don't want to start smacking it with a hammer, think that would maybe crack it further upstream..
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Year: 1991
Model: Cherokee
Engine: I-6 4.0 HO
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Curious as to why? I put those bad boys in when I did my header install however long ago. It wasn't until just a few months ago that I took them back out to replace the solid flange seal that was chewed on the sides with one I got from Advance. Also tossed the lock washers on. I've removed those bolts 3 times since I put them on with zero issue.
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Year: 1993
Model: Cherokee
Engine: 4.0
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Over a few years the heat cycles essentially lock the nut and bolt together if they are both steel. That's why a lot of the bolt kits come with a different nut.
#13
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Year: 1992
Model: Cherokee
Engine: 4.0L
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I can't really tell if its pressed or screwed in since my face doesn't fit in between the pipe and block...
I'll try and put a jack under the pipe to get it all the way up so maybe I can grip the threads.
I'll try and put a jack under the pipe to get it all the way up so maybe I can grip the threads.
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Year: 1999
Model: Cherokee
Engine: 4.0
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Just checked the '92 and '99 IPC. They both take the same studs. Part number J4007109.
Here's what they look like:
http://www.oreillyauto.com/site/c/de...2419&ppt=C0022
Stupid name: "Exhaust Manifold Bolt And Spring". What "Spring"? LOL
I bought these and used stainless steel nuts instead of the carbon steel nuts that come with the kit.
Edit: 3/8" diameter threads.
Here's what they look like:
http://www.oreillyauto.com/site/c/de...2419&ppt=C0022
Stupid name: "Exhaust Manifold Bolt And Spring". What "Spring"? LOL
I bought these and used stainless steel nuts instead of the carbon steel nuts that come with the kit.
Edit: 3/8" diameter threads.
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Year: 1999
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How badley stripped are the threads?
3/8-16 threads (original) is close to M10-1.5 threads except the M10-1.5 threads are little finer.
You might try screwing an M10-1.5 nut on the butchered stud and see if it catches. Even if it does it may not hold on very long.
In the long run you may end up removing the exhaust manifold and removing the old studs and installing the new Dorman studs. If so, cut the old stud off next to the flange, heat it up with a torch or MAPP until it turns red, then using a punch and a BMFH, punch out the stud.
3/8-16 threads (original) is close to M10-1.5 threads except the M10-1.5 threads are little finer.
You might try screwing an M10-1.5 nut on the butchered stud and see if it catches. Even if it does it may not hold on very long.
In the long run you may end up removing the exhaust manifold and removing the old studs and installing the new Dorman studs. If so, cut the old stud off next to the flange, heat it up with a torch or MAPP until it turns red, then using a punch and a BMFH, punch out the stud.
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