Brake bleeding problems

[brakedust]

So after re-fitting my rear calipers and trying to bleed the system im having issues, I've put about 2ltrs through it and im still getting small air bubbles and when the bleed points are shut the pedal goes to the floor and I get hardly any brake force.

Anyone come across this before or got any tips?

[Robscim]

Which method are you using?

I've got an Easibleed you could borrow, but I'm near Gatwick.

Rob

[brakedust]

I've just had a 1 man bleed system, with a tube and NRV into a pot, but im still getting bubbles

[Robscim]

If it's one of those non-return valves on the end of a pipe onto the bleed nipple, you'll be a long time!!

You need an easibleed!

You're welcome to borrow mine but I'm a few miles away. Maybe someone closer will have one. Failing that, they're not expensive to buy.

Oh, and just remember to reduce the pressure in the tyre you're using to 10psi (you'll understand when you see the kit) else you'll have brake fluid everywhere!!

Let me know.

Cheers

Rob

[brakedust]

Cheers for that Rob, think I will invest in one for the future, a trip to halfords is in order then, guess you can never have to many tools!

Thanks for the offer of a loan

[Robscim]

I haven't used mine since I had the Scimitar, but always handy to have - almost impossible to bleed some systems without one (or the garage vacuum system).

Had a look on-line and Halfords show it at £20 and Screwfix at £18, so shouldn't break the bank (certainly not in Cerbera terms!!!).

Let me know how you get on (and don't forget to drop the spare's pressure beforehand!!!).

Cheers

Rob

[brakedust]

Cheers Rob, I got one today and still no joy, put 2ltrs through, all came through with no bubbles, so thought I was onto a good thing!

So with the pressure from the spare tyre I have a nice solid pedal. but with the pressure off from the tyre and the engine running the pedal goes right to the floor with little brake force.

A friend at work has suggested that I leave the pedal down (so have held it down with a jack handle) to let any air through. but if I try and push the air through with the pedal I get some air through.

So does this point towards a brake master cylinder being fooked? Or something else?

[spongy]

Brake master cylinder,but may be the cervo bud.is it okay untill you fire it up cos this normally points towards a dead cervo

[brakedust]

The pedal goes to the floor with the engine off or running, so does that point towards the master cylinder?

[spongy]

bud are you putting the fluid that you have run through the system once back in.Dont shout at me but i have seen this done and it will give air bubbles.

Edited by spongy on Wednesday 24th August 22:42

[spongy]

I would put my money on the master cylinder seals old bean.

[brakedust]

No its fresh fluid, and with the easybleed its coming through bubble free, just with bubbles when I'm pumping with the pedal!
How easy are these to change? Done the clutch one before without to much problem.

[spongy]

Normally really easy,but have not done one on a cerb before.good luck bud glad you made it safely home

[Tanguero]

Do the rear callipers have an inner and outer bleed nipple like the front ones - I can't remember?
If they do, then you need to bleed the inner nipple first followed by the outer one otherwise you get an air pocket trapped.

[brakedust]

Well finally got back to this, new master cylinder fitted, full system bleed with no bubbles using the ezzi bleed.

And I STILL have the same problem! Im at a loss now and getting fed up with this problem, taking her off the road for the winter anyway, so I'll tinker over the next few weeks.

I'll have one last try tomorrow. Going to drain all the fluid from all 4 corners and put new fluid in.

Anyone got any other ideas?

[ridds]

May be a bit of egg sucking here but here goes.

Have you loosened any fittings apart from the nipples?

Fill the reservoir to the top
Start at the back of the car
Bleed both sides of the calipers with the easibleed first
Once done have someone pump the pedal for you
Open nipple, watch bubbles but close the nipple before ALL pressure is lost, pedal up

Keep a VERY close eye on levels and don't let it get more than 5mm or so below the top.

Short of that, better get checking the pipes as it sounds like you have a leak!

[ukkid35]

One man systems are all very well, but there's nothing quite like a helpful gf to assist with the pumping.

Seriously, this is better done with two rather than solo, as you can then see what's going on, and get instant feedback from your pedal pushing assistant.

[philcerb]

try filling a oil can with b/f put a bit rubber pipe on the end open the bleed nips and pump the b/f back to the m/cyl.

[philcerb]

try filling a oil can with b/f put a bit rubber pipe on the end open the bleed nips and pump the b/f back to the m/cyl.

[tinker-27]

I know it sounds to silly but ive seen it a few times , are the calipers on the right way up , ie nipples both at the top ? Get some one to pump the brake and see if there is excessive pad movement , if they are worn they can cause spongy brake if fitted back in the wrong place .