Author Topic: Blueprint's 1975 Triumph TR6  (Read 53865 times)

Offline Arthur Dent

  • Car Crazy
  • *****
  • Posts: 9251
  • Carma: +186/-80
  • Gender: Male
  • 42?
    • View Profile
Re: Blueprint's 1975 Triumph TR6
« Reply #360 on: April 20, 2024, 09:37:11 pm »
Locks surely are not a safety requirement. Honestly I'd never lock the doors on an old convertible. If someone wants in I'd rather they open a door than rip a roof.

Offline Firm

  • Car Crazy
  • *****
  • Posts: 7731
  • Carma: +231/-1072
  • Gender: Male
  • Urban Hick
    • View Profile
  • Cars: 2010 XKR, 2007 DTS, 2006 Escalade, 2000 Sonoma ZQ8,1996 Firebird, 1996 Firebird Formula, 1985 Trans Am, 1984 Camaro, 1978 MGB x2
Re: Blueprint's 1975 Triumph TR6
« Reply #361 on: April 20, 2024, 10:06:53 pm »
Definitely sounds like a Master Cylinder leak given you've got fluid coming down the firewall. As you said, you should be able to fill it and get enough action to drive it a short distance, stuff some rags around it to keep the fluid from going everywhere. Both parts are pretty cheap, so I'd swap both the master and slave cylinder - which is relatively easy in the TR6. I can't remember if the TR6 uses a short section of rubber hose, or if it's still right from the master to the slave, if there's a rubber section, replace it. If that rubber is swelled it won't bleed right and you'll be cursing.


Locks surely are not a safety requirement. Honestly I'd never lock the doors on an old convertible. If someone wants in I'd rather they open a door than rip a roof.

Agreed, I don't think I've ever locked an old British roadster.

Offline Blueprint

  • Car Crazy
  • *****
  • Posts: 10118
  • Carma: +169/-232
  • Gender: Male
  • member since way back when
    • View Profile
  • Cars: 2024 Mazda CX-90 GS-L PHEV, 2022 Subaru Crosstrek Limited, 1975 Triumph TR6
Re: Blueprint's 1975 Triumph TR6
« Reply #362 on: April 20, 2024, 10:40:33 pm »
Thanks guys! Had a quick look online for parts as I'm heading to the UK but prices are out there. I'll conduct proper research when I'm back.
Traffic engineer/project manager & part time auto journalist

Offline Blueprint

  • Car Crazy
  • *****
  • Posts: 10118
  • Carma: +169/-232
  • Gender: Male
  • member since way back when
    • View Profile
  • Cars: 2024 Mazda CX-90 GS-L PHEV, 2022 Subaru Crosstrek Limited, 1975 Triumph TR6
Re: Blueprint's 1975 Triumph TR6
« Reply #363 on: May 12, 2024, 02:37:08 pm »
Finally got a break in the schedule and went to the storage parkade with tools and everything I needed.

Turns out, for once, the easiest option worked and I drove it home! I first cleaned the clutch master cylinder with clean rags damped with new DOT 3 brake fluild, and cleaned the cap while at it. I managed not to get any junk in the lower part of the master. Once that was clean, by flashlight (dark garage) I could tell the slave is a replacement (looks like a Moss "Classic Gold"), that instead of the red rubber hose I have a clear plastic line and that the MC is the original Girling unit - why the rebuilder did not change it out is beyond me.

Then I applied protection over the paint and carefully filled the master with new DOT 3 fluid up to 2/3rds. Went in the car, pumped the clutch multiple times and felt the pressure coming back - all good. Removed the cap again, and topped it to the "full" line. More pumping. Time to start it up.

I had left the battery in the car since April 20th and never touched it (no outlet there for the maintainer). The TR6 vroomed to life like a new car (except for the requisite puff of black smoke  ;D). I left it warm up a bit, pushed the clutch in, clenched teeth and selected reverse - no grinding!!

After moving the car a bit indoors, I drove straight home. Did not bleed the system, and could not see any bubbles in the clear line to the slave. It drove fine with no shenanigans.

In my well lighted garage, I could see that the slave is installed on the correct side of the mounting bracker (frequent mistake with these cars), but the rubber cap is off the end and it had drops of fluid on it. I cleaned it and will see if it becomes wet again, but it appears it leaks, as well the as the master.

The cotter pin at the pedal box is worn and adds some pedal play, so I'll order one from Moss, along with a full hydraulics kit.

Offline Blueprint

  • Car Crazy
  • *****
  • Posts: 10118
  • Carma: +169/-232
  • Gender: Male
  • member since way back when
    • View Profile
  • Cars: 2024 Mazda CX-90 GS-L PHEV, 2022 Subaru Crosstrek Limited, 1975 Triumph TR6
Re: Blueprint's 1975 Triumph TR6
« Reply #364 on: May 12, 2024, 02:41:43 pm »
I could add that had bleeding had been required, it would not have been easy to tackle with the car on the floor. You can't have a visual of the bleeding nipple on the slave, as it's hidden behind two layers, first the frame rail and second the spin-on oil filter mod that this car has. You can touch it by feel, but turning a wrench on it is another thing...

My CTC ramps will come in handy once the parts come in, and this time I won't escape a bleeding job, unless I bench bleed everything first.
« Last Edit: May 12, 2024, 06:51:25 pm by Blueprint »

Offline PJungnitsch

  • Car Crazy
  • *****
  • Posts: 12743
  • Carma: +169/-337
  • Gender: Male
    • View Profile
    • Travel in Africa
  • Cars: Subaru Crosstrek, Lexus RX350, Evolve Carbon, Biktrix Juggernaut, Yamaha TW200
Re: Blueprint's 1975 Triumph TR6
« Reply #365 on: May 12, 2024, 03:47:07 pm »
Nice job

One advantage of old leaky cylinders is they will 'self bleed' to some extent  :D

Offline Firm

  • Car Crazy
  • *****
  • Posts: 7731
  • Carma: +231/-1072
  • Gender: Male
  • Urban Hick
    • View Profile
  • Cars: 2010 XKR, 2007 DTS, 2006 Escalade, 2000 Sonoma ZQ8,1996 Firebird, 1996 Firebird Formula, 1985 Trans Am, 1984 Camaro, 1978 MGB x2
Re: Blueprint's 1975 Triumph TR6
« Reply #366 on: May 12, 2024, 04:37:51 pm »
Glad you got it home without any trouble. That rubber boot on the end of the slave is just a dust cap, it's got an internal leak. Not a big deal, just kind awkward to get at to replace it. You're starting to get the complete British car experience.

Offline Blueprint

  • Car Crazy
  • *****
  • Posts: 10118
  • Carma: +169/-232
  • Gender: Male
  • member since way back when
    • View Profile
  • Cars: 2024 Mazda CX-90 GS-L PHEV, 2022 Subaru Crosstrek Limited, 1975 Triumph TR6
Re: Blueprint's 1975 Triumph TR6
« Reply #367 on: May 12, 2024, 06:56:36 pm »
Glad you got it home without any trouble. That rubber boot on the end of the slave is just a dust cap, it's got an internal leak. Not a big deal, just kind awkward to get at to replace it. You're starting to get the complete British car experience.

Indeed!

Going to order this : https://mossmotors.com/580-778-clutch-hydraulic-kit

and this: https://mossmotors.com/596-165-clevis-pin-pedal-to-master-cylinder, https://mossmotors.com/365-720-washer-plain-5-16, https://mossmotors.com/325-330-cotter-pin-con-rod-nut, times two, to remove all slack from the worn 49 y.o. pins (there's quite visible slack at the pedal)

and might as well add this: https://mossmotors.com/588-415-pipe-master-cylinder-to-hose-lhd and this https://mossmotors.com/589-140-adaptor-pipe-to-hose to have a completely new setup. Hard pipe has to be bent into shape, and it looks like a "fun" job with the routing of said pipe.
« Last Edit: May 12, 2024, 06:59:09 pm by Blueprint »