Hi ,can anybody advise me on the best way to bleed the brakes on my xjr, I suffered brake failure after the dreaded excessive corrosion of the brake pipes on o/s/r.
I have renewed the pipes and bled the system several times but the pedal is not as good as it use to be.I have checked to make sure there are no leaks.All is good but the pedal is very spongy and on road test an emergency stop is not at all possible.
Any help would be greatly appreciated.

 

When I bled mine, I used the factory method. Attached a hose to the bleed nipple, put in a jar of clean brake fluid. Cracked open the bleeder, had helper push pedal to floor and hold. Closed bleeder. Repeated until no bubbles were visible. Repeat for each corner, keeping master cylinder topped off.

If you had a total brake failure it's possible you have air in the master cylinder or in the ABS pump. I know other cars have a bleed method where the computer can command the ABS to run through a self-bleed routine, but that shouldn't have happened unless you replaced the ABS unit. And may not apply to this vehicle at all.

 

Did you just do the standard bleed? Sounds like you got a lot of air in it. I'm wondering if following the additional steps to bleed when new calipers are installed might help. If you haven't, please look here; you'll find the bleed pdf at the bottom. https://www.jaguarforums.com/forum/x...ice-how-61323/

 

Thanks for your help .I forgot to mention that the xjr has brembo brakes all round with separate electronic handbrake calliper.
Will the procedure be the same ? .
Thanks

 

I would bleed the brake furthest from the master cylinder, ie back right wheel. Bleed fluid, have assistant hold pedal down until you close the bleeder. then keep going until you have 3 times min without bubbles, Then go to back left brake and repeat, then front right then front left. keep master cylinder topped off between each wheel, then check when you are done. that should do it

RyeJag

 

The Brembo calipers have two bleeders per caliper don't they?

And Sean B recommends rotating the front caliper to get the bleeders to the top when bleeding to get the last bit of air out.

 

Yes there are 2 bleeders per calliper and both are at the top of the calipers.i have re-bled this morning but no signs of air in system.
Further road test and I'm not happy with the brakes and although no warning lights are on I don't think the abs/traction control is working, but would this be due to a poor brake pedal ?? ,

 

The Brembos need to be bled so that both bleeders are open at the same time. This is hard to do with manual bleeding. It is easiest to use a pressure bleeder to be sure you get no air. I have a simple one from Motive Products. Makes fluid changes a snap.

 

So, I was about to tell everyone about Speed Bleeders as an alternate to the pressure bleeder from Motive Products (I opted for Speed Bleeders on our '97 as I wasn't sure which Motive product would fit it--the Speed Bleeders worked great).

However, after checking with the manufacturer on which speed bleeders for my '05 and getting them, when I pulled the old bleeder off (I only have one bleeder per caliper), the diameter was much larger than the replacement speed bleeders I had ordered. Having already started the job and with noone at home to help me do it manually, I did all four myself without closing the bleeder between pumps (went very slowly). End result, it is just as good as it was before. Granted, I was just flushing out the old brake fluid so there wasn't any air in it to start with. At any rate, if you have the right size, speed bleeders work great. That said, I think I'll invest in a pressure bleeder since I have no idea which speed bleeders will fit now.

 

Do you happen to have the part number / model number?

Thanks,

Gordon