What's new
Porsche 911 UK Enthusiasts Online Community Discussion Forum GB

Welcome to the @Porsche911UK website. Register a free account today to become a member! Sign up is quick and easy, then you can view, participate in topics and posts across the site that covers all things Porsche.

Already registered and looking to recovery your account, select 'login in' and then the 'forget your password' option.

Design 911 supply Porsche parts, Porsche spares and Porsche accessories, to both retail and to the trade. Our Porsche product and accessory range includes brakes, exhausts, tyres, wheels and Porsche panels and interiors.

Spongy brakes

D

dt4

Spa-Francorchamps
Joined
16 Mar 2016
Messages
335
The car has been in the garage since the beginning of November whilst I have sorted out exhaust clamps and the oil pressure sender
I took it out today to see what readings the oil pressure gauge gave whilst running and to get to temperature etc....
One thing I noticed was the brake pedal was soft and needed a couple of pumps to get a decent peddle feel but it kept going back to spongy

What are the likely causes and remedies please?
It was all fine before going in the garage

cheers
 
Well if it keeps going spongy and needs pumping up then either you have a small leak in a pipe or hose somewhere or the master cylinder itself has failed (the seals).

Have a look closely at all the hoses and pipes and see if there is a slightly wet spot. It will most likely be a very small pin hole if indeed it is a leak.
 
dt4, there are numerous causes for a spongy brake pedal, though given it was fine the last time you drove it, and that it has been laid-up for some months..hmm.

I would look for the easy stuff first.. I have had the same issue in similar circumstances on an SC, caused by a brake piston in a rear calliper that seized up while lying idle (in a two piston calliper)

Wheels off, I spotted it by having a friend pump the pedal while I went round the discs looking at the callipers and saw one of the discs being deflected slightly to one side every time the pedal was pressed... the spongy feeling was the disc flexing and springing back against the one operational piston that was causing it to deflect.. Freed off the piston and all was well.

Flexy hoses can if damaged expand like a balloon to give a similar effect.

If that does not work and you have brake hose clamps you could go round the flexy pipes clamping them off in turn to see if your problem is related to a single caliper..?

Good luck and please let us know how you get on.
 
Thanks for the replies
Ill start by checking the hoses
 
You must log in or register to reply here.

Similar threads

T
Boxster S 986 spongy brakes
Replies
5
Views
858
½cwt
Â
X911
Engine mount nut
2
Replies
16
Views
927
X911
X911
P
Newbie - 996 turbo engine break in help
Replies
7
Views
1K
rgracin
R
M
997.1 Carrera 2S 3.8 low oil pressure at hot idle
Replies
7
Views
2K
mikey2times
M
I
For Sale 2003 986 2.7 Manual
Replies
1
Views
250
iainm198
I
gizlaroc
Anyone interested in 3 litres Mobilube PTX 75w90?
Replies
0
Views
817
gizlaroc
gizlaroc
J
  • Locked
Sold 911 997.1 C2 Manual 3.6 for sale
Replies
6
Views
2K
Jantheman
J
Independent Porsche Specialist

Latest posts

New Threads

Porsche Model Range

Porsche 911

Porsche 992: 2018- Porsche 992: 2018- Porsche 991: 2011-2019 Porsche 991: 2011-2019 Porsche 997: 2004-2012 Porsche 997: 2004-2012 Porsche 996: 1997-2005 Porsche 996: 1997-2005 Porsche 993: 1993-1998 Porsche 993: 1993-1998 Porsche 964: 1989-1993 Porsche 964: 1989-1993 Porsche Carrera 3.2: 1983-1989 Porsche Carrera 3.2: 1983-1989 Porsche Carrera SC: 1977-1983 Porsche Carrera SC: 1977-1983 Porsche 930 Turbo: 1975-1989 Porsche 930 Turbo: 1975-1989 Porsche Early 911: 1964-1977 Porsche Early 911: 1964-1977

Porsche Hypercars

Porsche 918 Spyder Porsche 918 Spyder Porsche Carrera GT Porsche Carrera GT Porsche GT1 Porsche GT1 Porsche 959 Porsche 959

Other Current Porsche Model

Porsche Taycan : (2019-0%) Porsche Taycan : (2019-0%) Porsche Macan : 2013- Porsche Macan : 2013- Porsche Panamera : 2009- Porsche Panamera : 2009- Porsche Cayman: 2005- Porsche Cayman: 2005- Porsche Cayenne: 2003- Porsche Cayenne: 2003- Porsche Boxster: 1997- Porsche Boxster: 1997-

Porsche Legacy Models

Porsche 928 Porsche 928 Porsche 968 Porsche 968 Porsche 944 Porsche 944 Porsche 924 Porsche 924 Porsche 914 Porsche 914 Porsche 912 Porsche 912 Porsche 904 Porsche 904 Porsche 550 Porsche 550 Porsche 356 Speedster Porsche 356 Speedster Porsche 356 Porsche 356

Forum statistics

Threads
124,563
Messages
1,441,543
Members
48,979
Latest member
Lb456

porsche insurance porsche parts porsche sales porsche car sales porsche for sale
porsche classic sales porsche tuning porsche sold porsche specialist porsche engine rebuilds porsche driver training porsche car sales porsche exhausts

Community platform by XenForo® © 2010-2024 XenForo Ltd. XenForo theme by xenfocus

www.911uk.com @Porsche911UK THE DEFINITIVE PORSCHE FORUM Copyright © 911UK 2002-2024 All rights reserved.

911uk.com is not associated and is wholly independent of Porsche Automobil Holdings SE, Dr. Ing.h.c.F.Porsche AG, Porsche Cars GB, its subsidiaries and offical Porsche centres. Any word, phrase or graphic that in any way resembles anything to do with the Porsche name or organisation are registered trademarks of Porsche Automobil Holdings SE and Dr. Ing.h.c.F. Porsche AG.

Back
Top