Exhaust loctite?

[Mike Spano]

i may have missinterpreted the post, i apologize. i thought we were talking about the 4 M3 bolts that hold the pipe to the mounting plate, not a pipe that bolts to the motor with long M3's. yes, i nut those as well.

[Barry Tilson]

i may have missinterpreted the post, i apologize. i thought we were talking about the 4 M3 bolts that hold the pipe to the mounting plate, not a pipe that bolts to the motor with long M3's. yes, i nut those as well.

Yes, both sets of hardware are being discussed. Your correct Mike. Lock washers on the 4 smaller M3 bolts is hard to find. It seems like the silicone isolators may provide some locking characteristics with the combination of Loctite or high temp silicone on the threads.
I have done what Kevin and the others have suggested with the lock washers. This fits well with how I would like to see the two header bolts hold the manifold on.

[rcnut]

If I'm not mistaken, the 4 blind nuts on the header are a type of "crush" nut...not needing loctite of any type. I've had one of those nuts lock on very well, to the point I could not remove it from the header! 

[Barry Tilson]

They are a different type of nut than I'm used to seeing. I will keep an eye on them to see how they hold out.

[Rodney Kirstine]

They are self-clinching nuts.  They're usually used in sheet metal.  I use them all the time in sheet metal panels on equipment.

http://catalog.pemnet.com/category/pem-brand-self-clinching-and-broaching-fasteners