How much loctite to use?

[not2slow]

Hi,
I need to loctite the bolts on my front brake rotors. I'm using the blue threadlocker (243). So how much do you put on the bolts. Couple of drips? Light covering along length of bolts? Just at the end of bolt so it spreads up the bolt as it tightens?
Instructions say "allow assembly to cure for 24hrs"...i take this to mean: bolt rotors on and give it 24hrs before trying to do stoppies or front flips over the handle bars?

[FJRider]

Hi,
I need to loctite the bolts on my front brake rotors. I'm using the blue threadlocker (243). So how much do you put on the bolts. Couple of drips? Light covering along length of bolts? Just at the end of bolt so it spreads up the bolt as it tightens?
Instructions say "allow assembly to cure for 24hrs"...i take this to mean: bolt rotors on and give it 24hrs before trying to do stoppies or front flips over the handle bars?

So ... the nuts wont come undone ... but the "quality" bolts Hyo's are fitted with ... may shear off ...

Oh ... a light surface covering is all thats needed ... not much at all ...

[scumdog]

Hi,
I need to loctite the bolts on my front brake rotors. I'm using the blue threadlocker (243). So how much do you put on the bolts. Couple of drips? Light covering along length of bolts? Just at the end of bolt so it spreads up the bolt as it tightens?
Instructions say "allow assembly to cure for 24hrs"...i take this to mean: bolt rotors on and give it 24hrs before trying to do stoppies or front flips over the handle bars?

Gunna put new floating rotors on my T-Sport so I'd like some good advice on that too.

[The Lone Rider]

Covered this in one of the past magazine issues, with contact charts and hold strength. April 2010 issue maybe?

"Blue" loctite is marginal for metal on metal. It will hold, but ideally use the medium-tough stuff (Purple). I use blue currently, after trialing purple for a year. Purple definitely holds, but can be harsh on soft metals and no good for threaded or thread through plastics.

You only need a few drops on the thread where the contact patch will be (not on any overhang that might thread through to the other side).

If you aren't sure of the size of the contact patch, give yourself a lead in as the loctite will spread itself through.

24 hours for full curing. 1 hour for simple drying - a commute down to the dairy or to work should be fine as long as you tightened the bolt to the correct torque.

[Ocean1]

I put a line down the length of thread on the bolt that'll end up mated with the nut / female thread. Enough to coat all of the mated surfaces but not enough to dribble everywhere when you do it up.

I quite like the new lipsticks, less critical with the application and less mess.

One thing to watch, heat kills loctite. In fact that's one way to make it let go on larger surface area assemblies. So it's not a good idea to use it on things like manafold nuts.

[DEATH_INC.]

I've always just used a couple of drops, it spreads real well and I've yet to pull anything apart that I've thought should have had more.

[doc]

Gunna put new floating rotors on my T-Sport so I'd like some good advice on that too.

Might I suggest tiedowns a better option for the ferry. That thing of yours weights a ton and I dont think floaty rotors will help.

[not2slow]

thanks for the replies. Used 1 drop either side of the bolt placed 1/4 to 1/2 up the shaft and then tightened to torque spec. Its bloody runny stuff!

[tigertim20]

Hi,
I need to loctite the bolts on my front brake rotors. I'm using the blue threadlocker (243). So how much do you put on the bolts. Couple of drips? Light covering along length of bolts? Just at the end of bolt so it spreads up the bolt as it tightens?
Instructions say "allow assembly to cure for 24hrs"...i take this to mean: bolt rotors on and give it 24hrs before trying to do stoppies or front flips over the handle bars?

smear it everywhere, cant use too much....







P/T

[quickbuck]

smear it everywhere, cant use too much....







P/T

Yup,
The ol' "A little is good, so a lot must be great"

[scumdog]

smear it everywhere, cant use too much....







P/T

It's not flavoured lubricant we're talkin' 'bout....

[scumdog]

thanks for the replies. Used 1 drop either side of the bolt placed 1/4 to 1/2 up the shaft and then tightened to torque spec. Its bloody runny stuff!

Yep. you've got it sussed!

[not2slow]

Yep. you've got it sussed!

Will put this to the test as the rotors need to come off again

[not2slow]

smear it everywhere, cant use too much....
P/T

Prefer not to have to smash out more bolts, makes simple jobs a pain in the arse!

[imdying]

I put a line down the length of thread on the bolt that'll end up mated with the nut / female thread. Enough to coat all of the mated surfaces but not enough to dribble everywhere when you do it up.

I quite like the new lipsticks, less critical with the application and less mess.

One thing to watch, heat kills loctite. In fact that's one way to make it let go on larger surface area assemblies. So it's not a good idea to use it on things like manafold nuts.

I've always just used a couple of drops, it spreads real well and I've yet to pull anything apart that I've thought should have had more.

You two will know... assuming the torque setting given is for a clean dry fastener, how much effect (presumably it needs reduction) does the loctite have on that figure? 40% less?