Self losening Bolts

My manifold bolts keep losening themselves! Every 200 miles or so they all need tightening up again. This is casusing me to replace the gaskets a lot. There has to be a way I can stop them doing this (aside from loctite). They are SS manifolds with brand new ARP bolts. I have had to do it so often I can now get to all the bolts and get the manifolds off without having to jack the car up!!

Any ideas?

Didn't someone post something about trick washers?

Cheers Clive

What sizes did you get and were they expensive?

Chris

Wildfire im having the same problem on my chim ive replaced the gaskets 3 times due to the bolts undoing themselves.
Nordlock it is

another vote for the Nord locks 3/8" in stainless is the size you need
Fixes this problem thats for sure

Matt

When these cars were built how did they get over the problem TVR did'nt use those or any locking washers.
Is this a common problem should i check mine?
V8 Animal

There's a lot of exhaust weight hanging on the manifolds, i think an engine mounted support bracket to the y peice would help to balance the heavy lever arm of the cats and y peice. One for Clive perhaps.

I ordered a pack of 25 yesterday from nordlock £11.52 inc delivery turned up this morning
Im going change my existing choclate manifold bolts which were changed last year (the garage will remain nameless) for a set of ACT arp bolt at the same time.
I hope this solves the problem

Would it be cheaper if a few of us got together?

I use spring washers and have never had a problem. Use some copperslip on the bolts so that they won't sieze... use spring washers on the bolts and get them tight. End of problem.

£11.52 for 25!!!! I paid £20.60 for 20!!!! Not happy