Hi all,


I had my car have it's annual obligated road control and they found out my right rear wheel is braking 50% less then my left rear wheel.

*Disc Brake
*Pads are ok
*Some rust on the discs on both sides

Does anybody have any clue/clues as to what can cause this?

Any information will be greatly appreciated.

 

air in the lines would be my first guess...flush all brake lines

what i like to do is on the last one, open and close the bleeder valve before the pedal hits the floor...this ensure no excess fluid leaks out and allows a small bit of air in at the bleeder valve

 

Check your e brake cables
Check your caliper slide pins

 

Thanks for the replies guys, much appreciated .

I should have mentioned I re-greased the slide pins with silicone grease paste.

The E brake is the hand brake I assume, there is play in the cable and I need to pull up the E brake reasonable high.
There is no friction when the car is up and I turn the wheels.

I will bleed the brakes and after that I think I did everything that can be done, unless someone else has any other idea's.


Just wanted to be sure that I did all I could before I have it retested and pay for the retest, only to find out I forgot some possible stupid and "easy" fix and having to have a retest again.

My excuse for my grammar English is not my native language.
(I am Dutch)

 

Your e brake cables could be stretched out
Take the rear wheels off and have some one pull the hand brake and watch the movement on the caliper lever if both move the same amount then its good
Air in the system should cause a spongy or soft brake pedal

 

Thanks again for the reply.

The brake pedal feels firm similar to the other Accord.

Will see if the e-brake cable is stretched.
I actually did not pay attention to how they did the test and if the pressed the brake pedal or pulled the e brake.

Will check if this could have been the culprit.

Thank you for thinking along with me!

 

Another thing
Check your brake caliper piston is not sticking or frozen
You can do that by taking the caliper off and turn the piston clockwise
If you are going to bleed the brakes make sure you do it in this order
LF
RF
RR
LR

Good luck

 

Could your master cylinder be going out? How is the braking in the front? The master cylinder is split in 2 halves, with one half going front left to rear right, and the next half going front right to rear left. Check the corresponding wheel on the front.

 

Thank you for the headsup on the bleeding order.
The calipers where not frozen but will recheck just incase.

You may have a point about the master cylinder going out.
From what I understood when they tested the front difference was acceptable (from what they measured) but that does not mean the master Cylinder is working fine.

I had the car nearly in a spin on a rainy day when I applied the brake in a corner.
(I know it is best to brake before the corner but a fox crossed the road)
I thought there might have been some oil on the road but it can also be because the brakes where not functioning properly.
Car started sliding on the back towards the left which could mean left rear was blocking and right front was braking more then the other side.

Food for thought... I will be back home in a week or two and will put these theories to the test.
I will update here what I can find.

Thanks again guys