Race Engine Forum UK

Im curious where you would use loctite in an engine build.
I was recently told not to use in on my flywheel bolts, just use the backing plate....so i did, but i cannot get my head around why not though, other than the fact they may be hard to remove afterwards.

Thanks.

You need to torque the bolts up. Using adhesive can alter the torque required to pre-tension the bolts. Especially using a different type of adhesive from an open container (dried out) or at a different temperature or something like that, will give unpredictable friction.

Loctite as it is is a valuable failure preventive in the right place. Using to much will contaminate mating faces like between the flywheel and crank so use sparingly.

I use it on every rotating fastener on our race car. Flywheel bolts, cam gear fasteners supercharger driven/drive pulleys etc. We don't pull our engine down often so bolts that can not be checked in the interim need the extra locking assurance.

My experience tells me that if a fastener coming loose will/can cause mortal injury it will get a dab of Loctite.

Oh dear

yet another topic covered at length in my 'new book'.

GC

Guy Croft wrote:Oh dear

yet another topic covered at length in my 'new book'.

GC

Well i do have the old book Guy....why wasnt it covered in that one ?
UNACCEPTABLE, are you going to make me buy the new book just to read up on loctite? and a hundred other new things i bet!

Absolutely. A thousand other things more likely.

There are (see below) 5 pages specifically dedicated to fasteners and type/use incl the use of locking compounds and hundredsand hundreds of other references to the subject in the rest of the book.

This is - after all - an educational book in a sense.

GC