Stage One Kit Fitted
Posted 27 March 2025 - 11:53 AM
As per the topic title: I have an SPi (JDM) Mini and suspect that the brake cylinders in the rear wheels are not working properly. Instead of fiddling with them, I simply want to replace them. Unfortunately, I'm having trouble finding the correct part number. Looking at a website such as Minispares I'm getting overwhelmed by the large variety being sold.
What part number do I need for my car?
Moved Into The Garage
Posted 27 March 2025 - 12:05 PM
One Carb Or Two?
Posted 27 March 2025 - 02:58 PM
As a side note, the tool Mini Spares sells for installing the spring clip is really good and gets them on without any undue stretching.
https://www.minispar...er-circlip-tool
Stage One Kit Fitted
Posted 28 March 2025 - 08:38 AM
All here https://www.minispar...ap0109/page/86/
The SPI is the same as the last Mini.
Yes, I did find that table, but didn't know which row would apply to my car. So you say that I should look at the row called "998/1300 Latest 1990 Mini with built in servo GSM119. was GMC242"? Now that I see this description: my car indeed has a GSM119 servo. If my understanding is correct, the rear brake slave cylinder would be part number GWC1102.
Edited by NLinPEN, 28 March 2025 - 08:48 AM.
Up Into Fourth
Posted 05 April 2025 - 09:27 AM Best Answer
Correct GWC1102
FS
Stage One Kit Fitted
Posted 05 April 2025 - 02:56 PM
Yesterday I received the parcel containing these brake cylinders, plus a set of new rear brake springs. Hopefully I have some time in the coming few days to install these items. I'm considering what I can do to minimize the loss of brake fluid when undoing the brake hoses to the cylinders. What I think of doing is to take an old brake hose that I have kept, cut it off an inch or so behind the connector and plug that end of the hose with a bolt and hose clamp. Then I put that "blanking plug" in the hardline connector when removing the current brake hose. Edit brain fart: that didn't work.
Edited by NLinPEN, 08 April 2025 - 02:49 PM.
One Carb Or Two?
Posted 07 April 2025 - 02:53 PM
That should work! You can also buy special "soft" pliers that lock and are made to pinch off rubber lines.
Before I switched the braided lines to replace my master cylinders hard lines, I always kept a set of bolts that fit in the master in my brake parts kit. I was put them in the second I got the hardline out to stop dripping. Brake fluid is really harsh stuff and will take the paint of things pretty easily.
Up Into Fourth
Posted 07 April 2025 - 03:48 PM
Crazy About Mini's
Posted 07 April 2025 - 06:04 PM
Fill up the reservoir and work smartly and you will lose little fluid and as a bonus change some fluid.Steve..
You could even stretch a latex glove over the nech of the reservoir and then refit the cap - if air can't be drawn in very little fluid is going to leak out the other end.
Stage One Kit Fitted
Posted 08 April 2025 - 02:56 PM
Small update: yesterday and today I replaced both cylinders. Yesterday I was really struggling with installing the E-clip that holds the cylinder in place. Eventually I was successful. But it took so much time that I wasn't able to install the second one: did that today. Unfortunately I was not able to keep the brake fluid: it all came flowing out when I disconnected the first cylinder. The items I had prepared to plug the hole were all too large. No big deal, I will use some fresh brake fluid to fill up the system and bleed all four brakes.
One Carb Or Two?
Posted Yesterday, 02:24 PM
Great to hear. At least now you know you have fresh fluid and a fresh bleeding and should be good for bit:-)
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