[HartfordRacingCaptain]

Instructions for installing and uninstalling the brake calipers to take on and off the track brake deflectors calls for a reapplication of red Loctite and 148 ft-lb torque to the caliper bolts.

My understanding was that red loctite was meant to be a permanent application. If this is happening to support track days multiple times a year, isn't there some sort of fatigue working on the bolts? Is there a heightened risk of shearing if performed often (i.e. 6 times a year)?

[VinnAY]

I might prefer blue loctite, yes the red is more "permanent".

[HartfordRacingCaptain]

Originally Posted by VinnAY

I might prefer blue loctite, yes the red is more "permanent".

If failure were to occur at any time and they saw that you used anything other than what their instructions said to use it sounds like the sort of thing warranty would be denied for.

[VinnAY]

You put it on with red and 148ft lbs it'll be on there til the end of time.

[VinnAY]

On and off as you wrote it would negate the use of Red.

[HartfordRacingCaptain]

Red and 148 ftlbs are what the GM supplied instructions say to use, Step 12.

I'm not challenging your logic BTW, makes total sense to me.

[Scargoes]

LOCTITE® 272 is a red, medium viscosity, methacrylate-based threadlocking adhesive with high strength. With a fixture time on steel of 10 min, brass 5 min and stainless steel 15 min, it is ideal for applications where any migration of the adhesive must be prevented. Can tolerate slight contaminations of industrial oils. Suitable for all metal fasteners. It has a breakaway torque on M10 bolts of 23 Nm.

you are torquing to 200nm, the breakaway torque for 272 is 23nm. You should be okay. 272 is used because it was designed to handle more heat than the other red colored formulas but it also isn't as strong as them. As for bolt fatigue, it will happen. I'm not sure of the expected life cycle GM has for them. Every manufacturer and application is different.

[HartfordRacingCaptain]

Originally Posted by Scargoes

you are torquing to 200nm, the breakaway torque for 272 is 23nm. You should be okay. 272 is used because it was designed to handle more heat than the other red colored formulas but it also isn't as strong as them. As for bolt fatigue, it will happen. I'm not sure of the expected life cycle GM has for them. Every manufacturer and application is different.

Appreciate the insight, thank you.

[VinnAY]

ah so we're not talking solely the red color but different formulas that are also red in color.

[HartfordRacingCaptain]

Originally Posted by VinnAY

ah so we're not talking solely the red color but different formulas that are also red in color.

Guess so, I thought all red was intended to be permanent.

[TheRealJA105]

Leave your track deflectors and heat shields on and don't worry about it