MG-Cars.info

Welcome to our Site for MG, Triumph and Austin-Healey Car Information.

Parts

TR parts and Triumph parts, TR bits, Triumph Car Spares and accessories are available for TR2, TR3, TR3A, TR4, TR4A, TR5, TR6, TR7, TR8, Spitfire and Stag and other TR models are available from British car spares and parts company LBCarCo.

Triumph TR6 - bleeding brakes

A quick question I am trying to bleed brake in rear and the pipe cnnection to caliper on drivers side leaks. Tryed to tighten still leaks then tryed to really tighten still leaks through center of nut past pipe. I removed he nut all the way and the last few threads of the flair nut seem to be missing and the nut realley didn't seem to bottom out to force flaired pipe to seal. Is this nut straight diameter or is it tapered. new calipers orginal nut and pipe. Dave
dgf Finch

The flare nut is Imperial and equivalent to your basic SAE straight flare nut (maybe) and SAE automotive flare angle (different from the AN aerospace angle). I seem to recall you saying your car is a 1972. At some point about 2/3 third of the way through the 1972 model year the calipers were changed from a 16PB caliper to the M16P caliper which used metric threads.

I am going to assume that you purchased some rebuilt calipers on an exchange basis. If by chance you just happen to have the old ones still, look on them and see if they are stamped 16PB or M16. Then look for the stamp on the replacements. If you wound up going from the Imperial to Imperial threaded caliper or metric to metric, get the appropriate replacement brake pipe and inspect the caliper threads for damage. If you wound up with later style metric calipers to replace Imperial calipers or the other way around, you need to get the appropriate style brake pipe.

Odds are that you either went from Imperial to metric or stayed with the same configuration since you didn't say anything about the caliper mounting bolts. The later metric caliper bolts have a slightly larger diameter shank to fit the slightly larger diameter holes on the metric calipers. I don't think that those bolts will fit the earlier Imperial calipers without opening up the mount holes. If you went Imperial to metric, try and round up some of the later bolts. The alternative for using the earlier bolts with the metric calipers is to bush the holes for the earlier bolts shank diameter (been there, done that, a border line thrill, but doable without opening up the caliper hole).
SteveP

steve thanks alot i will check that out. I assume your talking about the rear calipers put you mentioned the caliper bolts? dave
dave

Dave,
I am a little confused. Are you talking about the REAR wheel CYLINDER or the front wheel brake CALIPER? Me thinks you are talking about the back end of the car. If it is the rear wheel cylinder pipe that is leaking, I would replace the pipe with a new one considering the leak is probably past the missing threads. Hopefully you did not do the cross thread thing.
Steve excellent post. It got me when I ordered new pipes.
Rick C
Rick Crawford

Calipers are for front disc brakes on the TR6. Rears are single piston wheel cylinders and drum brakes. A leak anywhere in the system will hose the bleeding process, so when you said caliper, I interpretated that as meaning caliper and up front. The only TR6s that I have seen with rear disc brakes were racers and a couple of modifed street cars, definitely not standard fitment on a TR6.

All standard rears on the TR6 are Imperial threads on the fluid fittings and are held in place with the multi-piece clip set up, not bolts regardless of it being the .70" or .75" bore cylinders. If you really wrenched down on those soft metal rear wheel cylinders with the steel flare nut, you could very well have ruined the cylinder. Inspect the line flare for damage, inspect the mating surface for the flare in the cylinder for damage and inspect the cylinder threads for damage. You may have to remove the cylinder to do a proper inspection.
SteveP

...and remember...

start furthest from the master cylinder and work your way in.

Why? Because it's the law.

Jim (petting my Mity-Vac)
Jim Deatsch

This thread was discussed between 12/11/2003 and 13/11/2003

Triumph TR6 index