Can you bleed an ABS/ESP pump by... - Page 2

Hanuman · 28-06-14, 05:29 PM

It's amazing what you can achieve with a broom stick, and a long piece of transparent tube. I've had less messy results than with the pressure kit.

andydunn2 · 28-06-14, 09:02 PM

Quote:

Originally Posted by The Real MSH!

It's amazing what you can achieve with a broom stick, and a long piece of transparent tube. I've had less messy results than with the pressure kit.

Are we still talking about bleeding battles here..

Just checking...

missfire · 28-06-14, 10:39 PM

I was wondering!

Yes using a pressure bleeder at 15psi. A friend stuck 30 through his and the master reservoir exploded! wary about upping the pressure! 20 then you say? or a bit more?

Brakes still don't work! £500 odd down in the last two days, discs pads, front calipers, handbrake cables and front flexi hoses and the brakes are worse than they've ever been.

It's a C5 BTW I'm doing if that makes any difference, with ESP, but I think the ESP just uses the ABS pump? don't know.

Regardless, I should be able to bleed it without VCDS? Anything I've read says it's impossible to bleed the ABS block without software.

Would you do it with the engine running?????

missfire · 04-07-14, 04:29 PM

Hmm, they seem to be working now.. sort of.

Bled them again with the pressure bleeder at 20psi, have done several hundred suicide braking maneuvers (on a private gravel track)(and on a private tarmac one.. with rain on it..), have run about three liters of fluid through it, not one bubble I can see but lots of dirt coming out.

Pads have bedded in a bit now.

And tried bleeding the nearside front caliper with the engine running, with the pressure bleeder, and pumping the pedal too, to see what would happen. Don't really know because I wasn't quick enough to run round and look at the waste nipple pipe thing. But I think there was a bubble in it!

Will try engine running, pressure bleeder and pedal pumping on all four calipers now. Just need more fluid. £10afekin liter at the local garage! pah!

TeXerv · 04-07-14, 06:56 PM

You better not pump the pedal (even not with a pressure bleeder and engine idling), without closing the bleeder screws at EVERY pedal release. Otherwise you will get every air bubble back into the system.
I know very well about problems bleeding a V8: The engine needs to idle, you need a pressure bleeder, you need to actuate the brake pedal, you need to push the brake force REGULATOR manually to full load, (sometimes you need to jack up the car at the l.h. rear to open the the brake force LIMITER), at least you need about 5 liters of brake fluid, and you need a second person, to open and close the bleeder nipples at every pedal move.

missfire · 04-07-14, 08:33 PM

OK I'll try again this weekend.

You can feel what they're supposed to work like now, but they are not right as yet. They don't really stop the car really quickly until they are warm, but they do work well.

TeXerv · 04-07-14, 08:57 PM

Air in brake fluid makes the pedal pressure increase after quick following actuations. If your brake pads are new, no matter wether old or new disks, give them about 50 miles to grind in.

missfire · 05-07-14, 07:31 PM

Sorted.

got a few more bubbles out and brakes are good now, MOT this week. Sell it the week after,

And just when I came out from loosening a lambda I need to replace.. AC condenser is leaking!!

tell me that's not an MOT failure! Never know these days.

Incidentally, I pushed 40 full master cylinders worth of fluid through each bleed nipple!!!

That should do it. Suck on that allroad!

saladdodger · 05-07-14, 11:29 PM

Quote:

Originally Posted by missfire

Sorted.

got a few more bubbles out and brakes are good now, MOT this week. Sell it the week after,

And just when I came out from loosening a lambda I need to replace.. AC condenser is leaking!!

tell me that's not an MOT failure! Never know these days.

Incidentally, I pushed 40 full master cylinders worth of fluid through each bleed nipple!!!

That should do it. Suck on that allroad!

Still didnt sort mine

Maybe I should try it running and the 2 man thing.

missfire · 05-07-14, 11:55 PM

Yeah give it a try. 'Man 2' was making soup so I did it myself, pressure bleeder, engine running and a drain pipe on the bleed nipple with a bolt in the end and a scalpel slice in the pipe. Probably ran about half to one litre through each caliper. Should work on yours, I was reading a fair bit on it and even the folk who make the software to cycle the ABs pump state that it is not necessary unless you want to change the fluid in the pump itself. (which I accidentally have anyway I think, while doing suicide braking maneuvers!) Thanks peeps for the help!

28-06-14, 05:29 PM	#11
Hanuman Trickster Classic Audi Club Member Join Date: May 2009 Location: Heckling from the cheap seats, Phnom Penh, KoW Posts: 7,006	It's amazing what you can achieve with a broom stick, and a long piece of transparent tube. I've had less messy results than with the pressure kit. __________________ I wish they would keep the damned Chinese away now that I can go home, so that I can enjoy Fish amok and a draught Angkor

04-07-14, 06:56 PM	#15
TeXerv Grown up member Join Date: Oct 2011 Location: Northern Krautland Posts: 241	You better not pump the pedal (even not with a pressure bleeder and engine idling), without closing the bleeder screws at EVERY pedal release. Otherwise you will get every air bubble back into the system. I know very well about problems bleeding a V8: The engine needs to idle, you need a pressure bleeder, you need to actuate the brake pedal, you need to push the brake force REGULATOR manually to full load, (sometimes you need to jack up the car at the l.h. rear to open the the brake force LIMITER), at least you need about 5 liters of brake fluid, and you need a second person, to open and close the bleeder nipples at every pedal move. Last edited by TeXerv; 04-07-14 at 07:05 PM.

05-07-14, 07:31 PM	#18
missfire making wooden things Classic Audi Club Member Join Date: Dec 2009 Location: cow land Posts: 8,154	Sorted. got a few more bubbles out and brakes are good now, MOT this week. Sell it the week after, And just when I came out from loosening a lambda I need to replace.. AC condenser is leaking!! tell me that's not an MOT failure! Never know these days. Incidentally, I pushed 40 full master cylinders worth of fluid through each bleed nipple!!! That should do it. Suck on that allroad! Last edited by missfire; 05-07-14 at 07:34 PM.

28-06-14, 10:39 PM	#13
missfire making wooden things Classic Audi Club Member Join Date: Dec 2009 Location: cow land Posts: 8,154	I was wondering! Yes using a pressure bleeder at 15psi. A friend stuck 30 through his and the master reservoir exploded! wary about upping the pressure! 20 then you say? or a bit more? Brakes still don't work! £500 odd down in the last two days, discs pads, front calipers, handbrake cables and front flexi hoses and the brakes are worse than they've ever been. It's a C5 BTW I'm doing if that makes any difference, with ESP, but I think the ESP just uses the ABS pump? don't know. Regardless, I should be able to bleed it without VCDS? Anything I've read says it's impossible to bleed the ABS block without software. Would you do it with the engine running?????

04-07-14, 04:29 PM	#14
missfire making wooden things Classic Audi Club Member Join Date: Dec 2009 Location: cow land Posts: 8,154	Hmm, they seem to be working now.. sort of. Bled them again with the pressure bleeder at 20psi, have done several hundred suicide braking maneuvers (on a private gravel track)(and on a private tarmac one.. with rain on it..), have run about three liters of fluid through it, not one bubble I can see but lots of dirt coming out. Pads have bedded in a bit now. And tried bleeding the nearside front caliper with the engine running, with the pressure bleeder, and pumping the pedal too, to see what would happen. Don't really know because I wasn't quick enough to run round and look at the waste nipple pipe thing. But I think there was a bubble in it! Will try engine running, pressure bleeder and pedal pumping on all four calipers now. Just need more fluid. £10afekin liter at the local garage! pah!

04-07-14, 08:33 PM	#16
missfire making wooden things Classic Audi Club Member Join Date: Dec 2009 Location: cow land Posts: 8,154	OK I'll try again this weekend. You can feel what they're supposed to work like now, but they are not right as yet. They don't really stop the car really quickly until they are warm, but they do work well.

04-07-14, 08:57 PM	#17
TeXerv Grown up member Join Date: Oct 2011 Location: Northern Krautland Posts: 241	Air in brake fluid makes the pedal pressure increase after quick following actuations. If your brake pads are new, no matter wether old or new disks, give them about 50 miles to grind in.

05-07-14, 11:55 PM	#20
missfire making wooden things Classic Audi Club Member Join Date: Dec 2009 Location: cow land Posts: 8,154	Yeah give it a try. 'Man 2' was making soup so I did it myself, pressure bleeder, engine running and a drain pipe on the bleed nipple with a bolt in the end and a scalpel slice in the pipe. Probably ran about half to one litre through each caliper. Should work on yours, I was reading a fair bit on it and even the folk who make the software to cycle the ABs pump state that it is not necessary unless you want to change the fluid in the pump itself. (which I accidentally have anyway I think, while doing suicide braking maneuvers!) Thanks peeps for the help!