Menu toggle

Brakes binding, simple or complex any ideas?

R

russpen

New member
Hi

I have a 1988 944S which has the normal single piston calipers. It has just passed it's MOT hurrah however it was reported that the front nearside and rear offside brakes were binding. The brakes are working ok but obviously not releasing fully on those wheels. It doesn't get driven as much as it should so it does stand for some time without being used.
Anyone had similar issues? have checked previous thread but not seen anything. I will be pleased to recieve any advice as to possible cause and next courses of action.

Russ
 
Single piston caliper is quite likely to be sticky pistons. Try winding them all the way in. Remove the master cylinder lid to make this easier. Then pump them back out to the disc with the pads in of course with the pedal. That could be a quick and easy fix. Could also be the sliding mechanism. Either way I am sure the calipers would definitely benefit from a light overhaul.
 
The 2.7 was suffering in the same way strip clean and replace using some copper slip on the sliding bits should work.
 
Russ the 944 is famous for "Plate Lift" it's where the stainless steel plates supporting the pads either end are mounted to the calliper. The calliper being alloy has an electrolytic action with the steel and corrodes slightly lifting the plates. The result is the pads don't float in their housing but are tightly clamped hence the brakes bind. In severe cases you can get through a set of pads very quickly!!! Mine wore from new to scrap in 3 hours driving!

The long term answer is to have the callipers rebuilt and and as Mike says copper slip on reassembly. Short term answer take the pads out (if you can get em out) lightly grip them in a vice and file the edges.

Here's one I prepared on the right, compared to an untouched one.

P1020305.JPG
 
I always file pads

They are normally an interference fit ie; will move but not readily. When they warm up they must get tighter so I take a fraction off, round off the edges so they slide easier and coppergrease the siding parts, 5 mins extra work

I`d rather hear them rattling than not
 
Many thanks, all very usefull advice and most importantly doesnt sound to expensive, hope to get on it at the weekend.

Will let you know how I get on.

Russ

 
You must log in or register to reply here.

Posts made and opinions expressed are those of the individual forum members

Use of the Forum is subject to the Terms and Conditions

Disclaimer

The opinions expressed on this site are not necessarily those of the Club, who shall have no liability in respect of them or the accuracy of the content. The Club assumes no responsibility for any effects arising from errors or omissions.

Porsche Club Great Britain gives no warranties, guarantees or assurances and makes no representations or recommendations regarding any goods or services advertised on this site. It is the responsibility of visitors to satisfy themselves that goods and/or services supplied by any advertiser are bona fide and in no instance can the Porsche Club Great Britain be held responsible.

When responding to advertisements please ensure that you satisfy yourself of any applicable call charges on numbers not prefixed by usual "landline" STD Codes. Information can be obtained from the operator or the white pages. Before giving out ANY information regarding cars, or any other items for sale, please satisfy yourself that any potential purchaser is bona fide.

Directors of the Board of Porsche Club GB, Club Office Staff, Register Secretaries and Regional Organisers are often requested by Club members to provide information on matters connected with their cars and other matters referred to in the Club Rules. Such information, advice and assistance provided by such persons is given in good faith and is based on the personal experience and knowledge of the individual concerned.

Neither Porsche Club GB, nor any of the aforementioned, shall be under any liability in respect of any such information, advice or assistance given to members. Members are advised to consult qualified specialists for information, advice and assistance on matters connected with their cars at all times.

Porsche
Lockton
Pirelli
Officially approved
Oracle Finance
WEX Esso
Collecting Cars
Back
Top