ocky

Hi all, need help with my xe v8 brakes.
Story is I have converted 6cyl xe to clevo v8 but am suffering from low/spongy brake pedal. Have changed drummy rear end to LSD disc brake rear, have had new brake pads all round, calipers overhauled on rear but still brakes feel average.
Have taken to brake place but they commented saying these model have a little brake pedal travel, but hey it should not have a third of pedal before anything happens. Have been tested, bleeded to death, lines locked, no air leaks etc - no better.
Could the problem possibly be a vacuum one - changing the motor effecting the amount of vacuum, or does a drum to disc brake conversion require a larger master cylinder, ie from a failane/fairmont to get a better pedal feel. Apparently workshop manual states there should be no difference in master cyclinder but fairmont/fairlane of same model offer different master cylinder - are these bigger?? ... better perhaps??

Perhaps if the master cylinder is tired, car has done 300,000, this could be causing this problem..... need help guys as this is really annoying, any help greatly appreciated.

regards..... Dave H.

xdc351

I have similar problems with my XD, compared to my 6cyl its brakes feel like their not working at all!

To see if its a vaccuum issue try rolling the car down a slight hill with the engine turned off. If the pedal feels the same/similar, its a vaccuum issue. To try fixing it a renewed master cylinder can help, a vaccuum tank can help too.

__________________
Just like a Tsunami.

XE V8

thanks for the advice

whaites

When changing from Disc front, drum rear to disc front disc rear, you need to change your master cylinder to suit.

Disc brakes require different pressure than drums. you will need a 4 wheel disc brake master cylinder, probably out of a fairlane of the same era.