Have Brakes!

Taken a while to report, but all things good come to those who wait!


  • Fitted a new Lockheed brake booster as fitted to the last of the MkIII Cooper S’s. I fitted nut inserts to the brackets that I also purchased, so that the bolts inserted from the wheel well, making it easier to remove in the future.
  • Fitted new vacuum hose with a new in-line one way valve. I also made a small loop for any fuel to collect in the hose, rather than going into the booster and perishing it.
  • I also had to make two new brake pipes to suit the inlet and outlets of the booster. Had never done this before but, I found it quite easy to do once I found out how to use the pipe flare tool. These pipes used just a simple bubble type flare, but I also made a double flare just because I wanted to see how to. I bent the pipes so that they kept a path free for the MAF pipes that I hope to do soon.
  • Being by my self today, it was a little harder to bleed the brakes, but in the end I got a reasonable hard pedal. I’ll bleed them further next week, when my Gunson Eezibleed kit arrives.
  • I also took some time to fill all the many holes previous owners have drilled in the inner fender, (looks like a colander), and bulkhead with grommets.
  • The windscreen washer bag that I purchased on Ebay and fitted previously, decided to become incontinent. It burst at the welded seam. So I scrubbed the old one to get rid of years of grime and it came up reasonably OK so it’s now fitted back in front of the new brake booster. I once again used nut inserts to hold it in place.

Some pictures for you.

Lockheed Cooper 'S' MkIII brake booster
Lockheed Cooper ‘S’ MkIII brake booster
Brake booster with nut inserts on brackets
Brake booster with nut inserts on brackets
Bumpers with over riders and nerf bars
Bumpers with over riders and nerf bars
Windscreen washer bottle
Windscreen washer bottle (note: wire that has pulled out of coil connector!)


To Do

  • Fit new front and rear stainless steel bumpers complete with over riders and nerf bars. The chrome ones on the car are peeling and fit badly, plus I prefer the MkI Cooper ‘S’ period look.
  • Continue to wire new EFI harnesses to relay/fuse blocks and to sensors.
  • Test and set-up PWM for radiator fan control
  • Re-bleed all 4 brakes when as all 4 corners Gunson Eezibleed kit arrives.
  • Fit the new heater. (Not doing until I have car on the road and tuned in… it is summer after all!)
  • Check timing and adjust the index position using TunerStudio to give the base timing value.
  • Adjust VE table to get it running OK
  • Take it for a drive to dial in VE table using TunerStudio’s VEAL.
  • Check that it runs!
  • Get a wheel balance and alignment.

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