Should I be worried?

NawidDaoud

Dedicated Member
Joined
Jun 15, 2020
Points
39
Location
Bristol
Afternoon chaps,

I have decided to go and view the Blue Z3 in Loughborough from the forum instead of the one in Winchester. Just wanted to see if anyone is able to shed any light on the following two MOT advisories:
  1. Nearside Front Service brake binding but not excessively
  2. Nearside Brake pipe corroded, covered in grease or other material front to rear
The mechanic at my local garage warned me that corroded brake pipes were a common MOT issue on the Z3s when I MOTed my last car before selling it. But does anybody know how much it might set me back to fix? And is it worth doing both sides at the same time or just the one?

Also, I don't really know what brake binding is, it sounds similar to the sticky caliper the other car was experiencing, but I'm surprised that this came up on its last MOT as the car apparently has had new pads and discs all round.
 

mrscalex

Zorg Guru (IV)
Supporter
British Zeds
3rd Party Trader
Joined
Jun 10, 2016
Points
165
Location
Swindon & Swansea
Afternoon chaps,

I have decided to go and view the Blue Z3 in Loughborough from the forum instead of the one in Winchester. Just wanted to see if anyone is able to shed any light on the following two MOT advisories:
  1. Nearside Front Service brake binding but not excessively
  2. Nearside Brake pipe corroded, covered in grease or other material front to rear
The mechanic at my local garage warned me that corroded brake pipes were a common MOT issue on the Z3s when I MOTed my last car before selling it. But does anybody know how much it might set me back to fix? And is it worth doing both sides at the same time or just the one?

Also, I don't really know what brake binding is, it sounds similar to the sticky caliper the other car was experiencing, but I'm surprised that this came up on its last MOT as the car apparently has had new pads and discs all round.
Binding often caused by sticky piston/slider bolt. So not cured by new discs and pads.

Brake pipe corrosion common on Z3s. Of course. They are nearly all at least 20 years old.

Typical 20 year old car problems really.

The brake pipe may be fine anyway. It could just be covered in underbody sealant of some sort. You can't replace rears front to back in 1 run without taking the rear axle out. They have to be replaced in sections. I'd avoid it unless there's reason to think the brake pipe is genuinely corroded.
 

Bumpa

Zorg Legend
British Zeds
Joined
Jun 23, 2017
Points
69
Location
Troon
Model of Z
Z3, 2.2 litre Sport
Yes, the brake binding will be the caliper not sliding on its mounting. When lots of makers are championing 4-pot and 6-pot calipers, the Z3 has a one-pot caliper. The piston shoves one pad against the disc, and then the reaction will make the caliper slide on its mounting to bring the opposite pad into play. If the sliding mounting is a bit stuck, one or other pad ends up binding on the disc. Its a simple fix. Just remove the caliper (no need to disconnect the hydraulics) and free up the sliding part. Its obvious when you see it.
 
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