WikiWirral Wirral's Biggest Online Forum
Forum Stats
12285 Members
65 Forums
73046 Topics
985435 Posts
34 posts in the last 24hrs
Max Online: 7831 @ 8th Apr 2013 4:18pm
Who's Online - Click Me
67 registered (11kendo, 16 invisible), 1530 Guests and 251 Spiders online.
Key: Admin, Global Mod, Mod
Social Media : Follow Us


(Views 7days)This Weeks Most Read
Garden Waste Bins 451
New Brighton Big Wheel 385
How worried should we be? 365
Homing Pigeon 318
Rock Lane West Crash - Road Closed 269
Little Boy Blue 265
The Durrells 262
Might have changed my mind re death penalty. 227
Freemasonry unwrapped 215
Whitehall shut down 202
New General Forums
Dreams
by granny
12:27 PM
Death penalty --to Paradise !
by venice
26th Apr 2017 12:54pm
Tory manifesto for the NHS
by casper
26th Apr 2017 11:06am
Fakes Docs
by snowshoes
25th Apr 2017 12:27am
New Wirral History
STREET MAPS
by Paternoster21
22nd Apr 2017 10:54am
Historic tours of Ellesmere Port
by Paternoster21
22nd Apr 2017 7:53am
whetstone lane boxing club
by oldbirkonian1
19th Apr 2017 6:34pm
Where was Wirral underground munitions factory?
by yoller
19th Apr 2017 10:01am
Memories or the chronicles of Birkenhead - Gamlin
by derekdwc
13th Apr 2017 12:03pm
Forum Tips
Photo Gallery Forums
New Brighton Big Wheel
Birkenhead Transport Museum 24th Feb 2017
Topic Replies
Might have changed my mind re death penalty.
by snowshoes
Yesterday at 11:18 PM
April Photo Competition
by granny
Yesterday at 06:50 PM
Residents Social Club Duke Street
by _Ste_
Yesterday at 06:01 PM
For Sale Single Folding Guest Bed
by Heidi123
Yesterday at 01:06 PM
zgemma box for sale
by stumpyduck
Yesterday at 01:02 PM
vu+duo for sale
by stumpyduck
Yesterday at 01:00 PM
Windows 10 latest "Creators" Update
by MikeT
Yesterday at 11:30 AM
Motorola Moto E3 smartphones, new and boxed, Black
by gerrymoore
Yesterday at 09:11 AM
Garden Waste Bins
by Beethoven
Yesterday at 08:37 AM
April
M Tu W Th F Sa Su
1 2
3 4 5 6 7 8 9
10 11 12 13 14 15 16
17 18 19 20 21 22 23
24 25 26 27 28 29 30
Recent Posts : What's On ?
Gawthorpe Hall
by diggingdeeper
26th Apr 2017 3:16pm
Dunham Massey
by techgran
14th Apr 2017 12:57pm
Topic Options
Rate This Topic
#131073 - 17th Mar 2006 8:27pm Spongey Brakes
DavidB Offline
Wiki Guide

Registered: 7th Dec 2003
Posts: 5599
Loc: Bebington, Wirral
I've got to a point where I'm properly a-scratching my bonce. I've bled the brakes once the conventional two man method, and twice with a pressure bleeder (awesome bit of kit, best thing I've bought in ages!), and I've even replaced the master cylinder, but still spongey.
I've gone through two bottles of Dot 5.1, so the lines are clean and there are no leaks. The springs on the calipers are in place, no kinks.

The problem is, the brake pedal is rock hard when the engine is off, but soft as sh*te when it's running. I'm looking at the servo as we speak, do these leak air at the pedals, also there is a bit of rust behind the m.cylinder, not much though.
It must be the vacuum, but I've been told it's not. It's pretty obvious it must be, can someone advise??
_________________________
"C20 LET bang"

Top
Google Ads
#131074 - 17th Mar 2006 8:45pm Re: Spongey Brakes
Scooby Offline
Forum Veteran

Registered: 9th Nov 2003
Posts: 5327
Loc: Birkenhead, Wirral.
It dosnt sound like the servo mate as if it was leaking Vaccum then the pedal would go hard, not spongy....

Bleeding Brakes :

Make sure the Master Cylinder resivoir is topped up at all times during the bleeding proces.

Start with the bleed nipple furthest away from the master cylinder, once this one has been bled then bleed the diagonally opposite bleed nipple. Once this one is bled then go to the remaining front bleed nipple and bleed that one, this should only leave you one rear one left to bleed, the one on the same side as the brake master cylinder but at the rear.

=====================================

A simple way to test for air in the brakes, pump the brake pedal up so its hard with the engine off, leave it for about 2 mins and then press it again, it should feel the same as you left it (Rock Hard) if its dropped or become spongy in the 2 mins then there is a brake fluid leak or air in the system....

I can have a quick look for you if your stuck mate, let me know......

Top
#131075 - 18th Mar 2006 2:57pm Re: Spongey Brakes
DavidB Offline
Wiki Guide

Registered: 7th Dec 2003
Posts: 5599
Loc: Bebington, Wirral
There's no air in the system at all though. I did the 2 minute test, rock hard it was.
Someone suggested clamping each brake hose to pinpoint the problem. Are you any good with calipers?! laugh
_________________________
"C20 LET bang"

Top
#131076 - 18th Mar 2006 7:20pm Re: Spongey Brakes
Scooby Offline
Forum Veteran

Registered: 9th Nov 2003
Posts: 5327
Loc: Birkenhead, Wirral.
Yeah mate, there is no point in clamping the hoses off coz you have not got air in the brakes, if you did have air in the brakes then the pedal would have gone down when you pressed it after the two mins as the air would have expanded over the two mins period.

Are the rear brakes disc or drum ?

Top
#131077 - 18th Mar 2006 11:09pm Re: Spongey Brakes
DavidB Offline
Wiki Guide

Registered: 7th Dec 2003
Posts: 5599
Loc: Bebington, Wirral
Discs on the back. I meant clamp the hoses to isolate one of the calipers.
I know I'll kick myself when I realise what it is.
_________________________
"C20 LET bang"

Top
#131078 - 19th Mar 2006 12:35am Re: Spongey Brakes
Scooby Offline
Forum Veteran

Registered: 9th Nov 2003
Posts: 5327
Loc: Birkenhead, Wirral.
I guess there is no harm in trying mate

Top

Moderator:  StuyMac 
Random Wirral Images

Click to View Topic.
Newest Topics
Might have changed my mind re death penalty.
by venice
28th Apr 2017 6:18pm
Carpet Fitter
by JaseB
28th Apr 2017 12:03pm
Garden Waste Bins
by granny
27th Apr 2017 10:55am
Ribes
by locomotive
26th Apr 2017 9:16pm
Rock Lane West Crash - Road Closed
by diggingdeeper
26th Apr 2017 3:10pm
For Sale & Free
For Sale Single Folding Guest Bed
by Heidi123
01:06 PM
zgemma box for sale
by stumpyduck
01:02 PM
Motorola Moto E3 smartphones, new and boxed, Black
by gerrymoore
09:11 AM
Brownie Uniform Age 8 or 9
by Giggler
28th Apr 2017 7:21pm
Maxi Cosi Tobi car seat 30
by Greenwood
27th Apr 2017 11:01pm
Featured Member
Registered: 23rd Mar 2013
Posts: 396
Newest Members
BritSol, errynbeattie, loubie343, windsail, Hollyange
12285 Registered Users
Today's Birthdays
Tanzi (50)
New Wirral Info
Carpet Fitter
by JaseB
28th Apr 2017 12:03pm
Garden Waste Bins
by granny
27th Apr 2017 10:55am
Homing Pigeon
by rossie
25th Apr 2017 10:23am
Gawthorpe Hall
by diggingdeeper
25th Apr 2017 12:28am
Freemasonry unwrapped
by Tait1969
24th Apr 2017 8:21pm
News : New Topics
Whitehall shut down
by eddtheduck
27th Apr 2017 5:42pm
Rock Lane West Crash - Road Closed
by diggingdeeper
26th Apr 2017 3:10pm
How worried should we be?
by venice
26th Apr 2017 8:35am
New Brighton Big Wheel
by cools
23rd Apr 2017 9:29pm
Found - cycle computer / speedo
by philmch
23rd Apr 2017 1:35pm
New Enthusiast Forums
Might have changed my mind re death penalty.
by venice
28th Apr 2017 6:18pm
Ribes
by locomotive
26th Apr 2017 9:16pm
Little Boy Blue
by cools
24th Apr 2017 6:58pm
The Durrells
by granny
23rd Apr 2017 6:39pm
Windows 10 latest "Creators" Update
by diggingdeeper
22nd Apr 2017 6:36pm
(Views 24hrs)Trending Newest Topics
Dreams 28
Wirral Sunrise Sunset
Sunrise Sun 5:37am
Sunset Sun 8:41pm
Local Time Sun 8:00am
WikiWirral Can . . . .
Advertising Click me
To Advertise with
Wikiwirral Click Me