General exhaust gasket

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General exhaust gasket

They are very likely to be studs rather than bolts and they can be a real pig. If you are unlucky they will shear off.
If you are going to do the job yourself and do not have oxy-acetylene equipment to heat the studs and nuts up before you start then do the following.
1. Warm up the engine a little, it doesn't have to be very hot, just run it for a couple of minutes.
2. Spray the nuts and studs with a decent dose of a good releasing fluid such as Plus Gas.
3. leave it for an hour or so then spray it again.
4. leave it overnight to really soak in and then try to undo the nuts.

The alternative is to take it to a decent exhaust place and have them do the work, they will have oxy-acetylene, stud extractors (if it does go wrong) and replacement studs.

Good luck:)
 
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