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Old June 4th, 2008, 10:59 AM   #1
JeepinJoe
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Header Bolts

I have a 304 in my CJ-5 with headers. The mufflers are attached directly after the header with nothing else attached. They are turbo style mufflers so they are not very heavy. Also, I do not have hangers on them. For some reason the header bolts keep coming loose and blowing out my gasket. What would can I do to keep this from happening?

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Old June 4th, 2008, 11:05 AM   #2
Chinski
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Got lock washers on the bolts?

Torque them cold, then hot, than after a week and check monthly. (Assuming you drive it frequently)

they also make locking header bolts, they have a clip that keep the bolt from backing out. I have never used them though.
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Old June 4th, 2008, 11:58 AM   #3
PavementPounder
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Its normal and is also the reason a lot of AMC V8 owners go back to factory manifolds since they flow pretty well anyway.

As Chinski said, get used to re-checking them if you're not going to use a locking provision. Copper gaskets are pricey, but they work better and won't "blow out".
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Old June 4th, 2008, 02:19 PM   #4
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stage 8 makes the locking bolts as talked about above.
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Old June 9th, 2008, 09:54 AM   #5
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Use locking bolts, or cut the flanges between each cylinder to allow for movement
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