Mot Says "rear Brake Application Uneven"

[Guest nessie]

Hi everyone

 

Right...........I have a 1991 J reg 1.9 GTI that failed the MOT recently for various reasons,one being the balance of the rear brakes with the foot brake was uneven.

 

I took the opportunity to upgrade a few things and i have replaced or refurbished the following....

 

Refurbed replacement rear calipers with ferodo ds3000 pads

Mintex M1144 pads on the front

New goodridge hoses all round

New copper pipes on the beam itself

New brake compensator on the left side where the balance was roughly 50% of the right.

Fresh fluid all round.

Bled properley with no issues apart from slightly greater force was required to bleed the rear left caliper.

 

Now,i bedded the brakes in and the performance is fantanstic with solid pedal but lots of feel so felt confident of a pass with the re test but same again!!!

 

The rear left pressure only moves to roughly 50% of the rear right on the MOT brake test. Now i am at a loss as to check next??? The M/C is a suspect but surely the front right would have the same problem as they are on the same circuit??

 

Any ideas??

 

Cheers

 

Dave

[TEKNOPUG 3]

Either compensator or caliper.

 

I had the same. Replaced both compensators and rear copper pipes.

Failed on the right rear brake caliper. No effect whilst driving. Fitted new caliper and it passed.

 

Either compensator or caliper.

 

I had the same. Replaced both compensators and rear copper pipes.

Failed on the right rear brake caliper. No effect whilst driving. Fitted new caliper and it passed.

[Guest nessie]

Thing is i have refurbed both rear calipers and they are ones that came with the new beam i fitted.So it has the same fault with 2 different calipers! which would make me rule the caliper out.

 

Could it be the rear RIGHT compensator be actually faulty and that it is not restricting the flow hence it is more powerful than the left??

 

Dave

[Miles 331 1 Cars]

What sort of fluid flow do you get out when bleeding the brakes?

 

But DS3000 pads in the rear and 1144 in the front, Really it should be the other way round as the back's never work that much

[Pugnut 9 1 Cars]

iirc, its always the opposite compensator to the one you logically think it is . i can remember struggling to bleed a caliper on my 309 and i remember needing 40 psi to get any fluid through using a gunson easibleed.a new comp sorted that out.

 

changing the other compensator should sort you out.

[Guest nessie]

Got a new compensator on order so hopefully that will be the problem.

 

Cheers

 

Dave

[Richie-Van-GTi 72 2 Cars]

Ive had this on a 306, follow your brake lines and check that both rear brake lines are opposite each other on the master cylinder. Sounds daft but mine turned out to be one front and one rear on the MC, switched them round and the barking evened out.

[rapidmi 4]

my old 205 failed on this take ur compensators off and blow them out with an airline