Bleeding brakes

20vcqdriver · 04-03-18, 07:29 PM

OK so does anyone have a method of bleeding the brake system on a 1986 Cq that works? Since installing the new calipers I have attempted to bleed them but brake pedal is still VERY spongy and twice as much travel as there should be, though now I've done a few miles they at least stop you but the travel is unacceptable. All ideas welcome

Colin Aitchison · 04-03-18, 07:57 PM

Sorry for the questions, but my own experience with brake on a coupe is on Ur quattro's, did you fit new front or rear calipers? dose the car have ABS? are you using a self bleed system or second person in the car pumping the pedal? what other brake parts have you changed or modified, servo, master cylinder, brake lines?

Jake Blight · 04-03-18, 09:15 PM

Had the same problem with my 87 cq prior to getting it back on the road, ended up getting my local garage to sort it. Still not sure what witchcraft they used but it certainly made a difference.

Good luck with it all.

Isimmo · 04-03-18, 09:55 PM

Strange, I've done it several times over the years using an eezibleed kit without issue...

John. · 05-03-18, 06:51 AM

Have an accomplice to pump up the pedal and then hold the pressure on whilst you open the nipple and then close (x10 maybe), has always been my preferred way to force air from the system.

Duffy3074 · 05-03-18, 09:19 AM

You doing it with the rear suspension supported in it’s normal position?

The rear valve cuts flow to the rear brakes if the suspension is drooping.

I used to have an eazibleed but they leak, I bought a Sealey VS820 which is a much better piece of kit

04-03-18, 09:55 PM	#4
Isimmo Super Moderator Classic Audi Club Member Join Date: Jul 2007 Location: Sissix-by-the-sea Posts: 15,218	Strange, I've done it several times over the years using an eezibleed kit without issue... __________________ 1985 WR quattro, 1985 20vT RallyRep, 1993 MTM ABY S2 Avant. 2010 S3 Sportback.

04-03-18, 07:57 PM	#2
Colin Aitchison Senior Member Classic Audi Club Member Join Date: Dec 2013 Location: Back home in Tillicoultry Posts: 1,308	Sorry for the questions, but my own experience with brake on a coupe is on Ur quattro's, did you fit new front or rear calipers? dose the car have ABS? are you using a self bleed system or second person in the car pumping the pedal? what other brake parts have you changed or modified, servo, master cylinder, brake lines?

04-03-18, 09:15 PM	#3
Jake Blight Grown up member Classic Audi Club Member Join Date: Sep 2015 Location: Cornwall, near England Posts: 881	Had the same problem with my 87 cq prior to getting it back on the road, ended up getting my local garage to sort it. Still not sure what witchcraft they used but it certainly made a difference. Good luck with it all.

05-03-18, 06:51 AM	#5
John. 4 ring whore! Classic Audi Club Member Join Date: Mar 2011 Location: Scottish Borders. Posts: 7,520	Have an accomplice to pump up the pedal and then hold the pressure on whilst you open the nipple and then close (x10 maybe), has always been my preferred way to force air from the system.

05-03-18, 09:19 AM	#6
Duffy3074 4 ring whore! Classic Audi Club Member Join Date: Aug 2015 Location: Dalgety Bay, Fife Posts: 2,079	You doing it with the rear suspension supported in it’s normal position? The rear valve cuts flow to the rear brakes if the suspension is drooping. I used to have an eazibleed but they leak, I bought a Sealey VS820 which is a much better piece of kit