Go Back   The 75 and ZT Owners Club Forums > The 75 and ZT Owners Club Forums > Technical Help Forum
Register FAQ Image Gallery Members List Calendar Mark Forums Read

Thread Tools Display Modes
Prev Previous Post   Next Post Next
Old 25th June 2010, 16:54   #1
Premium Trader
BigRuss's Avatar
75 CDT Tourer,2.5 Launch Saloon, Omipro MG/Rover (T4)

Join Date: Jul 2007
Location: Liversedge, West Yorkshire
Posts: 5,422
Thanks: 1,105
Thanked 1,340 Times in 661 Posts
Default Bleeding brakes a warning

Today I've been fitting new calipers to improve the brake performance of the front brakes, one of them was sticking slightly.

Hoses clamped off and calipers changed with no problems

Time to bleed the brakes and thought I'd do it properly on the T4, the sequence is as follows:

Select brake to be bled on screen menu after fitting bleed tube to bleed nipple.
Open bleed nipple and depress pedal to expell air until it runs clear ensuring resevoir is topped up.
Next press continue on the T4 menu to bleed the secondary circuit with the ABS pump until clear.
Finally tighten bleed nipple while pedal is depressed.

All was going well until it came to bleed the secondary circuit........... Absolutely full of air

Took a total of 4 bleed sequences on each side to get it free of air and 1/2 litre of fluid.
The pedal is now solid when depressed.

The problem for members is that normal bleeding or pressure bleed kits only bleed the primary circuit, in order to bleed the secondary circuit you will need to use suitable diagnostic equipment capable of using the ABS pump to bleed it properly.

I wonder if this is why some owners suffer from sinking pedal syndrome.


Replacement Key Service
Full T4 Testbook diagnostics available.
Diesel ECU repair and replacement.
Options enabled or disabled as required.
Diesel X-Power 135 and "160", Rover 1.8T 150 to 160
MG 160 V6 to 177 upgrades available
P.M. for details.
BigRuss is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

All times are GMT. The time now is 03:50.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright © 2006-2023, The Rover 75 & MG ZT Owners Club Ltd