Hi all,

Wondering if anyone can help. I have a 2/70 MK2 S in many pieces.

Brake and clutch master cylinders both measure 0.70. Both are plastic resevioir. One is alloy marked Lockheed, other is Cast iron marked Girlock.

Would either be the correct brake master cylinder ?

Any opinions on best option for clutch master ? Bore and sleeve one of the existing, try to acquire a correct 0.75, try and exchange somewhere for a refurbed clutch mc ?

Thanks in advance

Andrew

Minikingdom has them listed as exchange units:
https://minikingdomonline.com.au/produc ... -exchange/
Brake
https://minikingdomonline.com.au/produc ... ange-copy/
https://minikingdomonline.com.au/produc ... -exchange/

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don't know the measurements, but my 7/70 car has 2 x cast iron with Lockheed reservoirs

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did I tell you that I won a trophy?

Same configuration as my 3/70 Mk2 S which is also in many many bits. Sorry to be of no help, but will follow this thread.

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1970 Mk2 Cooper S under restoration

I sent my MCs to a brake shop also booster stainless liners etc cost $700. CS 4, 1970.Soon to be on road costing me big dollars. Full resto P7676

My 8/70 S has cast iron Girlock brake and clutch M/cylinders (plastic reservoir). Brake M/C = 0.70"; clutch M/C=0.75" Mine are probably original and resleeved.
There were alloy bodied M/cylinders but I don't know what they were meant for.

Thanks all for your responses. Very helpful. Cast iron it is. I will see if I can exchange the alloy .70 MC on a .75 cast one.

they came after the cast iron version - clubbies

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did I tell you that I won a trophy?

Just clean them up and get them stainless steel sleeved .

From what I have read, clutch should be .75 and both MC's are .70

Am I right in thinking ditch one of the .70's for a .75 ?

You don't have to ditch one , just ask them to sleeve to .75 .

Gotcha. Thank you

You would then have to get the internals to suit then. Are they readily available as spare parts with the 0.75 seal kit?

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1970 Mk2 Cooper S under restoration

The Brake Specialist where you get it sleeved should be able to supply the cups for it .I'm not sure who does the sleeving in the Sydney area , someone on here may know .

Warringah Brake and Clutch at Brookvale can get them resleeved/reconditioned.
Usually a couple of days as they send them away
They did all my brake cylinders and pipes and hoses about 5 years ago

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1969 Cooper "S"
1967 Mini Deluxe
1973 Clubman Van (the fleet spare)
1978 ex 1275 LS ("Wizard" Eaton Supercharged)
2015 HSV GenF GTS(occasional drive & tow car)
2019 MINI F55 Cooper S