Help Identifying substance on Torx threads

[rtoilhead]

Just replaced the topbox rack on my R1250GS.
Torx bolts very stiff to remove, does anyone know what the substance is on the threads.
Not sure if its anti-seize paste or some sort of thread lock!

Can't attach images so link!!

http://www.randbka.co.uk/bmwbolt.jpg

 

[NeverRodeBefore]

It's been a while since I owned a BMW but its quite possible its aluminium oxide corrosion from whatever the bolt was screwed into? Thread lockers are often, blue, green or red? Assuming it was screwed into an aluminium part, I'd reassemble with a dab of something like copper grease just to give a hope of it not seizing again.

 

[Wobbly65]

Thats threadlock, once the bolt is out it's best to run a tap down the hole to clean the old stuff out before putting a bolt back in with fresh threadlock. Otherwise it can get a bit tight

 

[jez]

Stainless steel and aluminium are prone to galvanic reaction which will corrode the aluminium way faster than regular steel bolts. One very good reason for manufacturers to use coated steel bolts.

 

[theop]

It's been a while since I owned a BMW but its quite possible its aluminium oxide corrosion from whatever the bolt was screwed into? Thread lockers are often, blue, green or red? Assuming it was screwed into an aluminium part, I'd reassemble with a dab of something like copper grease just to give a hope of it not seizing again.

What NRB said....

 

[Mr Bean]

Thats threadlock

Yup, taken a few off and the top box mount and grab handle screws have thread lock on them. Reassemble with Loctite and you'll be fine.

 

[knutk]

Stainless steel and aluminium are prone to galvanic reaction which will corrode the aluminium way faster than regular steel bolts. One very good reason for manufacturers to use coated steel bolts.

I do agree.
However, on the GS/A, the bolts holding the rack are screwed into the subframe, which is made of steel, so galvanic corrosion should not be an issue.

 

[Deleted account 210604001]

Related question, I'm about to mount some pannier rails, is blue (medium) threadlock appropriate ?

RBW.

 

[Wobbly65]

Related question, I'm about to mount some pannier rails, is blue (medium) threadlock appropriate ?

RBW.

Probably not necessary but won't do any harm I think. It's easy to dismantle any assembly it's used on but gives a secure grip

 

[tanneman]

That is Loctite that leaves a residue like that. Grab some 243 when reassembling. Use a cleaner such as loctite sf 7063 to clean the threads. Do not run a tap or die on the threads to clean it, use a brush and cleaner.

 

[rtoilhead]

Many thanks for all the recommendations!
A good clean and some Loctite will do the trick.
Regards

Alex