How to seal a tapered thread?

[Judo]

I was sort of under the impression a tapered thread - for example BSPT - is self sealing. I have a BSPT fitting in the the isuzu block for turbo oil feed but it's leaking. Is the answer just to do it up tighter or should I be using a thread sealer of some type?

I have locktite 243 if that's a good idea?

Talking about the brass fittings here...

https://www.aulro.com/afvb/images/imported/2016/02/191.jpg

Cheers.

[Judo]

Do I keep going until there is no gap between the brass fittings? I suspect I didn't get it that tight.... (limited space and visibility when doing it up!)

[scarry]

It will never seal without a sealant or thread tape.

Be very careful or you will snap it off.:(

Brass is quite soft

We use thread tape,but a locktite product will also probably do,someone will chime in for sure with the type to use.

[Blknight.aus]

a tapered thread is supposed to self seal. overuse and overtightening causes damage and prevents it from happening.

loctite 566 or 567 is the most appropriate answer thread tape will work as well,
243 will work but you need to be a little heavy handed with itfor it to work out properly which can make life a little interesting when it comes time to get it out. the 566 and 567 will seal up against a little oil contamination whereas the normal loctites wont.

generally most taper threads should seal up with finger tight+ 1/4-1/2 turn

[Judo]

Thanks guys. I will get hold of some thread sealer.

What's the general consensus on teflon tape for an oil line?

[incisor]

Thanks guys. I will get hold of some thread sealer.

What's the general consensus on teflon tape for an oil line?

i wouldn't use tape... loctite is much better in that situation imho

[Blknight.aus]

if you use it right and make it neat no problems. loctite 567s just faster and easier to use right an neat.

[ramblingboy42]

has everyone forgotten Stag?

smells good too.

[scarry]

Thanks guys. I will get hold of some thread sealer.

What's the general consensus on teflon tape for an oil line?

The other issue,which i forgot to mention, is with thread tape,make sure none gets inside the fitting.It is the last thing you want in an oil line.

That is why, as others have said,locktite is better in this application.

[Blknight.aus]

not in the slightest, its a brilliant goop but there are some applications where there are better goops to use.

If I was only allowed to carry one goop with me yet be expected to at least temporarily fix the most number of problems I would most likely grab a tube of stag.

For things like core plugs, flange seals, splines, dis-ssimilar metal mating faces, its very hard to go past.

In this application the consistency of the stag disrupting the "feel" of the thread winding in and seating counts against using it in my books.

[loanrangie]

has everyone forgotten Stag?

smells good too.

Good stuff stag is, i have used it on lpg fittings and coolant hose fittings on the tdi.

[Shakey]

No idea what stag is but given I've just cleaned the 1" BSPT thread on my 2.25 petrol and about to put the Welch plugs back, is that a job for stag?

[loanrangie]

No idea what stag is but given I've just cleaned the 1" BSPT thread on my 2.25 petrol and about to put the Welch plugs back, is that a job for stag?

Its a multi purpose fuel/gas/water resistant sealer.

https://www.autobarn.com.au/stag-jointing-paste-200-gram-tube-sg200

[JDNSW]

No idea what stag is but given I've just cleaned the 1" BSPT thread on my 2.25 petrol and about to put the Welch plugs back, is that a job for stag?

Yes.

John

[Blknight.aus]

No idea what stag is but given I've just cleaned the 1" BSPT thread on my 2.25 petrol and about to put the Welch plugs back, is that a job for stag?

They are perfect jobs for Stag... or, stag is perfect for those jobs...

Stag is a rusty coloured magical goop that one mastered will allow you to conduct a number of minor miracles when it comes to making things seal.

one of its key niceities is its rust coloured so it fits right in on most old iron engines.

[67hardtop]

Good stuff stag is, i have used it on lpg fittings and coolant hose fittings on the tdi.

Stag rules. Nothing better IMHO for the jobs its designed for.

Cheers Rod

Sent from my GT-I9507 using AULRO mobile app

[Shakey]

They are perfect jobs for Stag... or, stag is perfect for those jobs...

Stag is a rusty coloured magical goop that one mastered will allow you to conduct a number of minor miracles when it comes to making things seal.

one of its key niceities is its rust coloured so it fits right in on most old iron engines.
Thanks folks, sounds like I'm off to but some stag!

[Blknight.aus]

can be gotten from auto pro, good supercheaps, autobahn, ive seen it in bunnings, and mitre 10. Large truck shops carry it

[Judo]

My leak seems to be fixed. I went with this stuff.

Loxeal 50ml Thread Sealant 58-11 Anaerobic Adhesive | Bunnings Warehouse (http://www.bunnings.com.au/loxeal-50ml-thread-sealant-58-11-anaerobic-adhesive_p4920450)

[Shakey]

Can I just smear some stag around the non threaded Welch plugs too, or put those in dry?

[JDNSW]

Yes

[67hardtop]

Yes

X2 definatly. Good stuff.

Cheers Rod

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[Tank]

Also "Stag" is Non-Toxic, used on water (drinking) pipes and pipe threads in machines that manufacture food, Good ****, before Teflon tape, Hemp and Stag were the go on Galvanised pipes, water and gas, Regards Frank

[ramblingboy42]

.....and I remember stag parties were good too.

[67hardtop]

.....and I remember stag parties were good too.

Theres gotta be one in the group....lol😂😂😂

Cheers Rod😎

Sent from my GT-I9507 using AULRO mobile app

[Roverlord off road spares]

has everyone forgotten Stag?

smells good too.
Stag, I knew an engine rebuilder that loved the stuff so much he even had it on toast I think.;)