4 pots Metro calipers

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4 pots Metro calipers

Postby Chris59 » Sun Dec 02, 2018 11:17 am

Hello guys, could you please tell me what do I need to convert my Mk2 to 4 pots Metro brake calipers with vented discs ?
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Re: 4 pots Metro calipers

Postby Stuart » Sun Dec 02, 2018 12:03 pm

You need these parts Image

There used to be special caliper retaining bolts with a 3/8 thread and larger metric section to sit snugly in the slightly larger metric hole in the calipers, but I used standard Mini bolts with no issue. One thing to bare in mind is that they increase the track by about 6 mm per side (I think)

This kit, which is minus the uprights and CV joints which you should be able to reuse if in serviceable condition.

https://www.minispares.com/product/Clas ... |Back%20to

possible 2nd hand source http://www.theminiforum.co.uk/forums/to ... ded-hoses/
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Re: 4 pots Metro calipers

Postby Chris59 » Sun Dec 02, 2018 3:08 pm

Hello Stuart, many thanks for your help.


I should have told that I already have a set of Metro halfshafts, complete with uprights, calipers, discs, etc, but they need to be rebuilt (new seals, Stainless steel pistons, etc...)
Last edited by Chris59 on Sun Dec 02, 2018 3:12 pm, edited 1 time in total.
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Re: 4 pots Metro calipers

Postby Chris59 » Sun Dec 02, 2018 3:11 pm

So, if my understanding is correct, all I need are the special brake hoses, and, eventually, special caliper bolts ?
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Re: 4 pots Metro calipers

Postby Stuart » Sun Dec 02, 2018 3:20 pm

Chris59 wrote:So, if my understanding is correct, all I need are the special brake hoses, and, eventually, special caliper bolts ?


Yes just the hoses and bolts, although standard Mini bolts are fine really. From that I take it you won't be using the Metro uprights? which is a wise choice as Metro uprights change the suspension geometry quite a bit.

I'm also assuming your car is already on disc brakes.
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Re: 4 pots Metro calipers

Postby Chris59 » Sun Dec 02, 2018 3:25 pm

Stuart wrote:
Chris59 wrote:So, if my understanding is correct, all I need are the special brake hoses, and, eventually, special caliper bolts ?


Yes just the hoses and bolts, although standard Mini bolts ones are fine really. Okay, I understand.




From that I take it you won't be using the Metro uprights? which is a wise choice as Metro uprights change the suspension geometry quite a bit. I didn't know untill now it's doable, but no, Mini uprights will do the job

I'm also assuming your car is already on disc brakes. Yes, you are right !
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Re: 4 pots Metro calipers

Postby Stuart » Sun Dec 02, 2018 3:35 pm

Nice one Chris. This is another option drilling and tapping out the bleed nipple to make a link pipe and then use a hose with a single banjo fitting.

Picture 240.jpg
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Re: 4 pots Metro calipers

Postby Chris59 » Sun Dec 02, 2018 6:41 pm

Interestin idea, but, as I need to buy a complete set of braided brake hoses (the front ones on my Mk2 were more than old, and the rear braided hoses were twisted !), I don't feel enough confident to take the risk to drill my calipers incorrectly.
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Re: 4 pots Metro calipers

Postby Geoff Butcher » Sun Dec 02, 2018 9:39 pm

When I put Metro calipers on my Mk2 I retained the solid discs. Always worked pretty well.
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Re: 4 pots Metro calipers

Postby Chris59 » Mon Dec 03, 2018 8:20 am

Geoff, vented disc (that's what I have, if it was plain, I would use plain !) don't work better than plain disc, but you can expect less fading due to a bettter heat dissipation.
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