Disc brakes - need new calipers - question

Post by **bmcecosse** » Tue Aug 07, 2007 8:41 pm

Except that Barry has told us that the front wheels are FREE to turn when the car has been standing for a while. I still believe the master is holding pressure on the caliper - the pressure leaks away after a while, and the wheel is then free!

Post by **jonathon** » Tue Aug 07, 2007 9:12 pm

Where, I can only find 'your' reference to this Bm, where is Barry's, he doesn't mention it anywhere.The problem is only with one caliper , which is why I asked for clarification. I'd have thought that both calipers would drag/bind what ever they are doing if it was a m/c problem. I understand your logic, but its not presenting these symptoms.

Post by **bmcecosse** » Tue Aug 07, 2007 10:05 pm

Hmm - I'm sure Barry said at some point that this only happens AFTER the brakes have been used. I wish I had the time to go see the car and help - but I am in the midst of changing the fuel tank on my TR7 (rear axle off job) - and I must have the car going for the week-end!

Post by **jonathon** » Wed Aug 08, 2007 7:31 am

Ahhh!! found the rest of the tale on the original post in General section and yes Barry does say they are worse after being used, however only the one caliper is dragging.
We need to know how long the car has been driven before this problem showed. I'm sure even C.Ware could not have made the m/c mistake.

Post by **paulhumphries** » Wed Aug 08, 2007 8:25 am

I had the same problem with our "modern" Chrysler Neon.
After a while one caliper started to stick on.
Main agent diagnosed faulty ABS unit and wanted £1500 + fitting+ vat !
Turned out, when I looked, to be a duff front flexi pipe that was faulty internally and holding in the pressure.
Cost to fix - £26 which was a big difference to the main agents quote.
That was 5 years ago and it's never played up / failed MOT etc since.
You say garage has already changed the flexi on the side that is sticking.
My next check would be to see if there was a piece of rubber etc in the pipe somewhere that is restricting flow and acting as a one way valve.
I doubt it but cheaper than fitting a new caliper and then finding it's somthing like a piece of plastic off the top of a brake fluid container that is causing the problem.

Paul Humphries

Post by **badfelafel** » Wed Aug 08, 2007 8:40 am

have checked the abs sensor in the minor, but its not that!

Post by **paulhumphries** » Wed Aug 08, 2007 8:46 am

badfelafel wrote: have checked the abs sensor in the minor, but its not that!

But are you sure - they are well hidden on a Minor. Look behind the ECU that you can find next to central locking and electric window relays by the side of the air con unit

Paul Humphries

Post by **badfelafel** » Wed Aug 08, 2007 8:50 am

i have 2 air con units in mine - they swivel open and direct air right onto my face. very effective.

Post by **jonathon** » Wed Aug 08, 2007 9:49 am

Post by **badfelafel** » Fri Aug 10, 2007 4:31 pm

it wasnt the calipers!
see http://www.mmoc.org.uk/index.php?name=P ... 961#161961

Post by **fsk658** » Tue Sep 04, 2007 3:11 pm

I have just read the topic from (August) I have the same problem with my 4 door saloon When the caliper gets hot the o/s brake binds. I have changed the caliper fitted new pistons and seals twice and new set of pads. The correct seal in the master cylinder has been removed. It is always the o/s that binds. My pick up that I have just finished before the national rally suffers now with the same problem. This has a marina pedal box master cylinder and servo overhauled with all new parts, other people I have spoken to also have trouble with the o/s disc brakes binding. Both my cars have always passed the MOT. It seems that the pads dont quite clear properly. I dont know what the answer is ? They dont stick enough to overheat just make a binding noise at slow speed.
Very interesting topic

Morris Minor Owners Club

Disc brakes - need new calipers - question

Sticking disc brakes