suparuss
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| posted on 9/12/06 at 09:42 PM |
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brake pipe sealing
ive got some wilwood calipers and they all take npt threads which dont sem to be self sealing. can i use ptfe or is there something special to use?
many thanks,
Russ.
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MikeRJ
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| posted on 9/12/06 at 10:18 PM |
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Threads are generaly not used for sealing in braking systems, it's the flare on the end of the brake pipe that does this.
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flak monkey
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| posted on 9/12/06 at 10:27 PM |
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NPT threads should seal if you do them up tight enough, thats why they are tapered....
David
Sera
http://www.motosera.com
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suparuss
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| posted on 9/12/06 at 10:35 PM |
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cheers flak monkey! dint know they were tapered! duh.
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mark chandler
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| posted on 10/12/06 at 12:55 PM |
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My calipers had NTP threads, however to get to a seal I used copper washers.
I did not like the way the threads tightened, its also not a good idea to rely upon the taper if possible, as above brakes rely on the flare or copper
washers between machined surfaces.
I shortened the end of the flexi hose (landrover 90, Goodrich braided very cheap), as long as the caliper has a machined flat surface you are fine
doing this.
It also means that I get the best of both, taper seal & washer !
Regards Mark
[Edited on 10/12/06 by mark chandler]
 
Rescued attachment DSC00068.JPG
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RazMan
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| posted on 10/12/06 at 12:57 PM |
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Be careful you don't over tighten though - you can crack the casting! As already mentioned, if the correct fitting is used they should seal
easily.
Cheers,
Raz
When thinking outside the box doesn't work any more, it's time to build a new box
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NS Dev
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| posted on 11/12/06 at 09:11 AM |
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npt threads are self sealing.
using a copper washer on them is pretty dodgy as they won't necessarily engage to the correct depth and may lack mechanical strength.
Retro RWD is the way forward...........automotive fabrication, car restoration, sheetmetal work, engine conversion
retro car restoration and tuning
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JB
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| posted on 11/12/06 at 07:06 PM |
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NPT
A copper washer is a bad idea as you may not get full thread engagement. If you are worried then use some liquid thread sealant and locker which means
you will not have to nip it up so tight, reducing the risk of casting cracks.
The real fix is to drill and tap it to a parallell thread and get rid of the awful tapered thread. Then take the lesson onboard and never buy anything
with a tapered thread again!
Is it clear I dont like them??
John
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NS Dev
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| posted on 12/12/06 at 04:34 PM |
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too true John, but I really can't be bothered to strip my brand new calipers to bits to drill them out........that can wait!
Retro RWD is the way forward...........automotive fabrication, car restoration, sheetmetal work, engine conversion
retro car restoration and tuning
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