Rear caliper problem (Audi 80, B4) - Page 3

shaun5 · 18-06-12, 07:43 PM

Quote:

Originally Posted by Greavesy

I'm in Sheffield Shaun.
I've just blagged a lift fishing tomorrow so the car can sit there and think about its actions lol, will work on it tomorrow evening/wednesday eveing.

Bit far away from me.
I might take one of my knackered ones to bits to see how it works

Sleep on it , things always go better the next day

BIGGYIN · 18-06-12, 07:50 PM

I've not long,changed my back discs and pads.
I got a hex that fitted the piston(Some have 2 slots and you may need a special tool?) and turned it clockwise,while pushing in.After afew turns it bit and wound back in.It should wind back in,past the rubber seal.Do it slowly and make sure the seal isn't damaged.

I then bled the brakes,with Eezibleed Kit and last of all I operated the handbrake quite afew times.At first,the handbrake hit the roof.
Each time I operated the handbrake it got lower and it finally ended up,to about 3-4 clicks up.(Handbrake)

Greavesy · 21-06-12, 07:20 PM

Update for you guys! . . . Unfortuantly, still need help!

Right I've re-bled the brakes and they are all now gripping well and the hand brake is working spot on!

My new problem is that when I press the brake pedal there is totally no resistance with either the engine on or off!!! Occasionally there is also some pedal judder while releasing the pedal!

Help me guys!
I'm really starting to lose it with this car!

Cheers,

Andy

laura80 · 21-06-12, 07:32 PM

...long shot but did you take into account the compensator valve when bleeding , i spent ages trying to work out why i had a similar problem, wedged the spring back tight then bled the brakes again then pumped them abt 40 times then it worked a treat

Greavesy · 21-06-12, 07:36 PM

On the rear? Not touched that tbh. Didn't think I needed too.

laura80 · 21-06-12, 07:54 PM

na i didnt think so either , think it depends tho, i had my car on a 2 post ramp so the axle was down , found a mention of it in the suppliment of a haynes manual, was so frustrated having tried everything else i thought id give it a go, couldnt believe it when it worked

Greavesy · 21-06-12, 08:33 PM

Right, tried that. I've now got resistance in the pedal but its still goes to the floor?
Should it be like this? I personally have never had this before, the pedal always stops before it get to the bottom.

Cheers,

Andy

Greavesy · 21-06-12, 09:01 PM

could the master cylinder be dead?

laura80 · 21-06-12, 09:29 PM

seems unlikely if it was all working fine before...... have you pulled the handbrake on & off at least 40 times, if theres no possible leakage anywhere that you can tell, then somethins def going on somewhere

id be inclined to bleed the whole lot from furthest to nearest as a last attempt , if you have any motivation left!! also keep the spring tight on the compensator when pulling the handbrake on & off ( there should be a hole by the nut/bolt that holds the spring on that u can wedge a screwdriver thru to hold it back )

Greavesy · 21-06-12, 09:37 PM

Did another bleed but it didnt make any difference.

18-06-12, 07:50 PM	#22
BIGGYIN 4 ring whore! Classic Audi Club Member Join Date: Mar 2009 Location: Merseyside Posts: 7,976	I've not long,changed my back discs and pads. I got a hex that fitted the piston(Some have 2 slots and you may need a special tool?) and turned it clockwise,while pushing in.After afew turns it bit and wound back in.It should wind back in,past the rubber seal.Do it slowly and make sure the seal isn't damaged. I then bled the brakes,with Eezibleed Kit and last of all I operated the handbrake quite afew times.At first,the handbrake hit the roof. Each time I operated the handbrake it got lower and it finally ended up,to about 3-4 clicks up.(Handbrake) __________________ q90 B2 Type 85 - q90 B2 Type 85-PROJECT-ABY 20vt KARL. Injection is nice but I'd rather be blown

21-06-12, 07:20 PM	#23
Greavesy Grown up member Join Date: Apr 2012 Posts: 159	Update for you guys! . . . Unfortuantly, still need help! Right I've re-bled the brakes and they are all now gripping well and the hand brake is working spot on! My new problem is that when I press the brake pedal there is totally no resistance with either the engine on or off!!! Occasionally there is also some pedal judder while releasing the pedal! Help me guys! I'm really starting to lose it with this car! Cheers, Andy

21-06-12, 07:32 PM	#24
laura80 Grown up member Join Date: Feb 2009 Posts: 71	...long shot but did you take into account the compensator valve when bleeding , i spent ages trying to work out why i had a similar problem, wedged the spring back tight then bled the brakes again then pumped them abt 40 times then it worked a treat

21-06-12, 07:36 PM	#25
Greavesy Grown up member Join Date: Apr 2012 Posts: 159	On the rear? Not touched that tbh. Didn't think I needed too.

21-06-12, 07:54 PM	#26
laura80 Grown up member Join Date: Feb 2009 Posts: 71	na i didnt think so either , think it depends tho, i had my car on a 2 post ramp so the axle was down , found a mention of it in the suppliment of a haynes manual, was so frustrated having tried everything else i thought id give it a go, couldnt believe it when it worked

21-06-12, 08:33 PM	#27
Greavesy Grown up member Join Date: Apr 2012 Posts: 159	Right, tried that. I've now got resistance in the pedal but its still goes to the floor? Should it be like this? I personally have never had this before, the pedal always stops before it get to the bottom. Cheers, Andy

21-06-12, 09:01 PM	#28
Greavesy Grown up member Join Date: Apr 2012 Posts: 159	could the master cylinder be dead?

21-06-12, 09:29 PM	#29
laura80 Grown up member Join Date: Feb 2009 Posts: 71	seems unlikely if it was all working fine before...... have you pulled the handbrake on & off at least 40 times, if theres no possible leakage anywhere that you can tell, then somethins def going on somewhere id be inclined to bleed the whole lot from furthest to nearest as a last attempt , if you have any motivation left!! also keep the spring tight on the compensator when pulling the handbrake on & off ( there should be a hole by the nut/bolt that holds the spring on that u can wedge a screwdriver thru to hold it back )

21-06-12, 09:37 PM	#30
Greavesy Grown up member Join Date: Apr 2012 Posts: 159	Did another bleed but it didnt make any difference.