brake lines

Post by **rustbucket** » Wed Dec 16, 2009 4:08 am

whats the thread size's for the brake pipe fittings on a 66 minor 1000 ?
will they be 10mm, 3/8 unc or 7/16 unc.
or am i missing the obvious

Post by **rayofleamington** » Wed Dec 16, 2009 9:42 am

definately not 10mm!

Post by **PSL184** » Wed Dec 16, 2009 11:07 am

As standard, all the brake pipe ends are 3/8" UNF thread EXCEPT those on the rear axle which are 3/8" BSF.

Post by **rustbucket** » Wed Dec 16, 2009 1:51 pm

what on earth are these
http://cgi.ebay.co.uk/ws/eBayISAPI.dll? ... K:MEWAX:IT

Post by **bmcecosse** » Wed Dec 16, 2009 2:37 pm

Some master cylinders also appear to be 3/8" BSF !

I assume 'WW' means Whitworth - no such thread that I know of on Minor brakes (or any other brakes!) - but, they are 'Classic car specialists'

Post by **PSL184** » Wed Dec 16, 2009 4:08 pm

bmcecosse wrote:Some master cylinders also appear to be 3/8" BSF !

On both fittings or just to the rear?

Post by **bmcecosse** » Wed Dec 16, 2009 4:15 pm

Honestly don't know - but some have reported that their masters were 3/8" BSF. I was doubtful about this - always believing it was just the back axle - but they seemed very sure......... I have two spares - I really should check - but it's dark and scarey outside now............

Post by **PSL184** » Wed Dec 16, 2009 4:27 pm

I'll check my spare next time I'm in the garage too...

Post by **Alec** » Wed Dec 16, 2009 6:51 pm

Hello BMCE,

BSF is a Whitworth thread, similar to the association between UNF and UNC, with BSW being the coarser of the two, but both have a common thread profile.

Alec

Post by **bmcecosse** » Wed Dec 16, 2009 8:31 pm

Well - I think that's stretching it ! But yes - it is associated with 'Whitworth' - but you wouldn't normally describe a British Standard Fine thread as whitworth - surely? But it is probably what's meant in this sale - can't see what else it is! Hardly 'rare' though!

Post by **billlobban** » Wed Dec 16, 2009 11:22 pm

Is the middle connection on the front 4 way not BSF as well?

Post by **bmcecosse** » Wed Dec 16, 2009 11:30 pm

Front 4 way ? The one with the brake pressure switch ? I think it's BSP thread!

Post by **billlobban** » Wed Dec 16, 2009 11:43 pm

Yes the very one - has the brake light switch and 3 other connections 2 x course thread and 1 x fine - at least mine does - one each to the front brakes and one from the master cylinder. Presumably UNF and BSF

Post by **taupe** » Thu Dec 17, 2009 1:24 am

Ive posted this before but here is the Moprod catalogue for the minor 57-71 models - its all 3/8" bsf ref SPN on the diagram except the front brake cylinder link pipes 'D' ref SPA on the diagram which are 3/8" unf.

The only thing you need to check is are your fittings double or single flare as there is some variation in this (or perhaps non standard fittings may have been fitted).

The numbers after are the overall length in inches eg SPN 52 = 3/8" bsf both ends, 52" overall pipe length.

Post by **PSL184** » Thu Dec 17, 2009 9:04 am

Aha, good info.... Remember also the front and rear bleed nipples are different Front UNF, Rears BSF....

Post by **bmcecosse** » Thu Dec 17, 2009 1:15 pm

I'm still not sure this is correct for all cars - I know for FACT that the bundy pipe that joins to the front flexi pipes - is 3/8" UNF thread - certainly on my car - and it has dead standard flexis fitted.