Diff and gearbox filler and drain plug thread sealing recommendations.

[northiam]

I recently replaced by transfer box oil D2 and intend doing the same for the diffs. The rave manual calls for Loctite 290 applied to the threads for sealing. The Loctite instructions state, ensure threads are clean and oil free otherwise the sealant may be contaminated and fail. This seems impossible for a drain plug as oil will keep dripping for hours!

I’m a great believer in thread locking compounds and been using Loctite 243 for other threads for years but for my transfer box this time I used Teflon tape (PTFE) and its holding up well for a week now.

Obviously for the engine and transmission etc oil sump drains use a compression sealing washer so nothing more than correct torqueing is required.

Do you find the liquid form thread locker sealers hold up ? Do you think the Teflon is the way to go?

Cheers
Glenn

[robbotd5]

Glenn. I use the loctite 290 wick in and have never had a leak.
Regards
Robbo

[PhilipA]

I use the Loctite thread sealant , I think something like 518.

IMHO it is best to use a sealant rather than locking compound, and the thread sealant does not care whether it is oily or not, it just seals.

Regards Philip A

[Blknight.aus]

loctite 567.

[POD]

I've used the loctite hydraulic thread sealant (can't remember the number) on sump plugs for years, doesn't matter if they're a bit oily, they never leak. Never used it on the other plugs, must do that next time.

[scarry]

I have used teflon tape but don't like to as pieces can get inside,just what you don't want.
Also when you do the next change,you have to carefully clean the threads & the plug.It is the bits left in the thread that can be pushed inside if it is not cleaned well.
I use a loctite product,but can't remember the number which has been good.

What i have always wondered is why do most jap vehicles have a washer,either copper or alloy,but LR seems to use a tapered thread in the diffs,T/C,etc.

[Blknight.aus]

that would be loctite 577

[PhilipA]

Good to see that I am not the only senile one! LOL
Regards Philip A

[uninformed]

I have used Teflon tape.....I didn't think the little tiny bits would effect anything. I always clean as best as I can. And use New.

[Tank]

Teflon tape on a tapered iron plug can cause cracking, esp. in aluminium, it (Teflon) allows the plug to be overtightened and can cause the alloy to split.
I have never used anything on the threads of iron tapered plugs into alloy housings and have never had one loosen/fall out/leak, just nip it up tight, Regards Frank.