Unbalanced rear brakes
Posted
#1652953
(In Topic #233559)
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Im having problems with my mk1 cabriolet DX, rear brakes does not pass the annual technical inspection due to an incorrect balance between rear wheels braking (R/L). the handbrake works correctly and both wheels brake equally so it is a hydraulic problem or in the braking distribution.The first time the brakes are bled, they seem to brake correctly, but after a while they decompensate again and the fluid takes in air. It has been bled many times and the problem continues. Does anyone know what may be happening? Could it be the rear brake regulator?
Thanks a lot!
Posted
Local Hero
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They all start with GOOD Grounds.
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Thanks a lot!
Posted
Local Hero
Older cabriolets with the weight controlled proportional valve on the rear axle beam has been known to have issues.
If you have to re-bleed, then you have a leak somewhere.
If you have ruled out the MC, and the rear Wheel Cylinders, then you are left with brake lines, or the rear "compensator/proportional" valves.
What do Divorces, Great Coffee, and Car Electrics all have in common?
They all start with GOOD Grounds.
Where are my DIY Links?
They all start with GOOD Grounds.
Where are my DIY Links?
Posted
Regional Host NE
Re:
Really not too difficult to sort surely in my opinionBriano1234 said
You could have a proportional valve that is wonky.
Older cabriolets with the weight controlled proportional valve on the rear axle beam has been known to have issues.
If you have to re-bleed, then you have a leak somewhere.
If you have ruled out the MC, and the rear Wheel Cylinders, then you are left with brake lines, or the rear "compensator/proportional" valves.
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Do not know a lot but willing to help if possible
1989 Sapphire Blue Mk1 Cabriolet KR
1985 Atlas Grey Mk2 GTI 2.0 ABF
1989 Sapphire Blue Mk1 Cabriolet KR
1985 Atlas Grey Mk2 GTI 2.0 ABF
Posted
Local Hero
Just had to fix mine after it failed the UKs MOT, no fluid obviously peeing out but enough leaking out of slave cylinder to contaminate shoes and mean no breaking.
The opposite side of the cylinder was seized. These were installed new about 20 years/40,000 miles ago.
The other side of the car looked OK but under the cylinder dust cover was full of fluid.
Over the years I've done 4 or 5 Golf/Jetta rear brakes and its always becasue of seized and/or leaking cylinders and never worn out shoes.
1983 Mars Red 1.8 Golf GTI
1987 Alpine White 1.8 Clipper Cabriolet
The trouble with doing nothing is that you never know when you are finished.
1987 Alpine White 1.8 Clipper Cabriolet
The trouble with doing nothing is that you never know when you are finished.
Posted
Local Hero
On the drive
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Mk4 99 1.8t indigo blue Gti with 43k miles
Caster 93 clipper JH Green cabby
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Golf mk1 owner's club on Spotify
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T25 Diesel…sameoldblueshi£ (currently under resto)
Rocco gt2….1990 secret 2…(currently under resto)
Mk4 99 1.8t indigo blue Gti with 43k miles
Caster 93 clipper JH Green cabby
Snowy 91 GTi White cabby( sat waiting for inspiration)
Myvalver 89 GTi Grey mk2 16v
Yuppy Flu 91 GTi Flash Red Sportline
Golf mk1 owner's club on Spotify
Mk1 golf owners club playlist: Golf mk1 owner's club playlist - YouTube
Posted
Regional Host NE
Re:
How much for the full setKenneth Cartwright said
drums can be a nightmare, check the adjusting slider is grabbing and that you can set them equally by hand before adding real brake force. as above get a set of new cylinders and measure the liners and internal of drum, see if since been bad they need changing, did this job 2 months ago, was a mare took 4 attempts to get within the MOT spec. Now have a full set up drums, liners, and cylinders sat in a box "just in case " for next cabbys MOT.
Sent from my SM-G960F using Tapatalk
Do not know a lot but willing to help if possible
1989 Sapphire Blue Mk1 Cabriolet KR
1985 Atlas Grey Mk2 GTI 2.0 ABF
1989 Sapphire Blue Mk1 Cabriolet KR
1985 Atlas Grey Mk2 GTI 2.0 ABF
Posted
Settling In
Problem persists, the right rear wheel brakes less than the other. my cabrio gli is from 1989 so it has the mk2 MC with the two rear brake adjusters in the MC. This has to be the problem, we have cleaned them with ultrasound but no luck either. I have realized that the regulators are not what they should be (533612151) but that they actually have mk3 ones (1H0 698 401). the first ones are very difficult to find so I will buy the second ones again as it seems that it can work with them.
Thanks!
Posted
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Thanks!
Posted
Regional Host NE
Do not know a lot but willing to help if possible
1989 Sapphire Blue Mk1 Cabriolet KR
1985 Atlas Grey Mk2 GTI 2.0 ABF
1989 Sapphire Blue Mk1 Cabriolet KR
1985 Atlas Grey Mk2 GTI 2.0 ABF
Posted
Local Hero
1983 Mars Red 1.8 Golf GTI
1987 Alpine White 1.8 Clipper Cabriolet
The trouble with doing nothing is that you never know when you are finished.
1987 Alpine White 1.8 Clipper Cabriolet
The trouble with doing nothing is that you never know when you are finished.
Posted
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Early-1800 said
Have you had the drums off and had a look to see if anythings obviously amiss in there?
Yes, everything is new except the regulators, we have seen that one has a bent thread. The first braking works well but the next day it doesn't anymore, it seems to catch air bubbles
Posted
Local Hero
There is 2 types of wheel cylinder, the bigger 17mm one for cars with a rear brake system regulator and smaller 14mm cylinders for cars with out a regulator.
1988 Mk1 Golf GTi Cabriolet 1.8cc DX, K-jet. Daily drive. 317,000 miles and counting
1978 Mk1 Scirocco GLS 1.6cc FR, Webber carb. Weekend toy.
1978 Mk1 Scirocco GLS 1.6cc FR, Webber carb. Weekend toy.
Posted
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yes, 17,5 mm ATE. One side works perfectly every time. it is the other that little by little brakes less and coincides with the bent regulator.mark1gls said
Are both the rear wheel cylinders the same?
There is 2 types of wheel cylinder, the bigger 17mm one for cars with a rear brake system regulator and smaller 14mm cylinders for cars with out a regulator.
Thanks!
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