I wanted to check what was happening to the exhaust bolts and to see if I could find the reason for the noise which sounded like something was blowing. So I decided to get all the exhaust bolts out.
This is the motley selection of bolts. Hex bolts and standard bolts with out without one, two or three washers. Also quite a bit of this grey cement stuff has been used to fill in the gaps and stop the blowing. It's not working!
If you look closely at the bottom of the threads you will see that only a small proportion of the thread is being used to hold the bolt in. The poor condition of the remainder of the thread is because it has been exposed to the elements and not bolted down into the head. And the reason for that is..............
an extra large exhaust flange ring. Probably the exhaust pipes are too small in diameter so a spacer has been added but it is a litte too thick which prevents the regular bolts from biting too deeply into their bolt holes.
In two of the bolt holes the very first few threads have been stripped which now means even with the extra long standard bolts there is only 2 turns of bite. Not enough me thinks.
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