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Matt
Matt, Mechanical Engineer
Category: Jaguar
Satisfied Customers: 21707
Experience:  BEng hons Mech engineering, in auto industry 22 years
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I have 54 plate S type Jaguar 2.7 diesel Sport. A few weeks

Customer Question

I have 54 plate S type Jaguar 2.7 diesel Sport. A few weeks ago I had the rear brake pads and discs replaced and the braking system was working perfectly, however, I returned from holiday after two weeks and found that when I pressed the brake pedal it would not return immediately; after a a few miles the problem got progressively worse and I found that I had to manually lift the pedal with my toe to release the brakes - as soon as I let go, the pedal dropped and the brakes came on.
The master cylinder (genuine Jaguar part) was fitted less than two years ago so it seems unlikely that it is faulty. Help please!
Submitted: 1 year ago.
Category: Jaguar
Customer: replied 1 year ago.
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Expert:  Matt replied 1 year ago.
Hello if you haven't already then I'd bleed the brakes on all 4 corners and also check the brake discs for run out (see diagram) and check that the return spring on the pedal isn't broken, or the pedal hasn't broken in some way It could be a flexible brake line is ballooning under pressure, this can't always be seen from the outside so to test this use a hose clamp on each line in turn to close off then lines one at time . Push the pedal in between and see if you can feel any difference as each line is closed off. if this doesn't help then its possible that you need to run the ABS pump to move any trapped air insidethe dealer method is to use the diagnostic tool to cycle the ABS during bleeding however I've had good results buy just taking the car for short drive and stamping on the pedal at low speed to lock the brakes and trigger the ABSand then re-bleed

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