What type of Loctite?

[eddiev]

Hi.
I am in the process of an almost complete engine overhaul. I have blue and red loctite and was wondering if anyone had any advice as to generally when to use each. I am particullarly interested in the camshaft bearing bolts. So far I have used blue for the stator and R/R. I was told by the parts shop to use the red on anything that will never come apart again. I don't like the sound of that. Since it takes some time to get the cam bearing bolts torqued carefully in sequence and all, I am a little worried that the loctite may set too soon.

Thanks for all the help.
Eddie V

 

[Dink]

Loctite sets in the absence of air so take your time torque them correctly and it will only set off after you are done. Loctite the bolts that hold the oil pump in.

Dink

 

[bwringer]

There's also a lower-strength green loctite that's handy on 6mm and smaller fasteners and won't bung up aluminum threads like the blue and red, so you can use it just about anywhere. It's thin enough to penetrate and hold assembled fasteners.

NEVER use the red high-strength Loctite on aluminum threads, and be very certain that it's actually required if you use the blue medium-strength Loctite -- blue damages aluminum threads slightly upon removal, so it should only be used only where absolutely necessary.

The shop manual specifies which is required and where.

 

[Big T]

There's really not much you need to Loctite on a GS motor. I think you're into overkill using it everywhere

 

[madjack57754]

red is for stud and bearing mounting. you need to heat the part with a torch to get it to release I use the blue for most general parts and the green is of a wicking nature, for use with threads that are already assembled. Be aware that thread lockers don't work if the mated parts are not CLEAN and DRY. I use electrical contact cleaner to prep parts

 

[jimcor]

The only time I have needed the red was rebuilding the bottom end of my BSA B-25 Starfire 250 engine. Like Dinkster said on the oil pump and on the big end bolts. Blue works just fine where called for by a shop manual. Parts assembeled with red can be a real pita to take apart.

 

[eddiev]

Thanks for the replys. Like I said I've already used the blue for the stator. I hope that was allright. I guess it's too late now anyway. The red is still in it's package so I think I'll be returning it. What about the cam bearing caps and the outer covers? Blue green or none? Thanks.
Eddie V

 

[argonsagas]

Blue for the stator retaining bolts is fine, and it SHOULD be used there.

Having a bolt back off in that area will cause a great deal of engine damage very quickly. Clean the bolt and internal threads thoroughly, then be sure they are dry, before applying the thread locker.

If you are using the original bolts for the re-installation, you could add use the impact driver again, but using a square-shanked screwdriver will also allow you to get a better result, as you can slip a small wrench over the blade for additional torque beyond what you can achieve with just a grip on the handle..

 

[BadBillyB]

What about the cam bearing caps and the outer covers? Blue green or none? Thanks.
Eddie V

Properly torqueing the cam bearing caps is very critical
Make sure the threaded holes in the head are clean and dry (they must NOT have any oil in them)
Do NOT use any thread locker on the cap bolts, but instead put a drop of oil on the threads
Use an INCH/LB torque wrench, the torque value is too small for a FT/LB wrench. If you dont have one, borrow or buy one, these holes are easy to pull the threads out of

The outer cover bolts don't need loctite on them either as a rule.....The chrome covers that go on the outer ends of the valve cover and the ignition cover seem to get loose on the Gs1000 motors, so a little blue could be used here

BadBillyB

 

[madjack57754]

The only place on the cams I put (blue) Loctite is the cam sprocket bolts. Don't ask how i know that.