Brakes worse after bleeding!

[aymen_a22]

I have just tried to bleed the brakes with a vacuum bleeder and they are now worse.

The back left brake was drawing a lot of air and I have no idea why. I made sure the reservoir was full at all times.

I ended up resorting with bleeding the 2 man method and I still only have brakes about half way down the pedal.

I have taken the car for a drive and activated the ABS so the car can still stop.

I also noticed that if I pull the parking brake up it will stop at about 3 clicks. If I push the foot brake and then apply the parking brake it stops at about 10 clicks!

Also if I push and hold the brake pedal it slowly drops to the floor. It has always done this though, is that right?

Does anyone know what I am doing wrong?

It is a 2002 Right hand drive Seat Leon Tdi.

 

[james_cupra]

check down the side of the brake fluid reservoir for another bleed nipple. i had a similar problem to this on my 1.8T and bleeding there solved the problem. not sure if it would be the same set up on your tdi or not but its worth a look.

 

[aymen_a22]

Ok I will have a look tomorrow after work. I assume this should be bled last as it is closest to the reservoir.

 

[tom t]

at this rate im going to be giving this a go at the weekend is the gunson easi bleed the likes of halfords sell for about £20 up to the job? is that what you used bud?

 

[aymen_a22]

Nah I used a vacuum bleeder from a friend at work, I gave up in the end and tried the 2 man method however the brakes are still bad and I only have brakes at half pedal.

I took the car out and got the ABS going to try and make sure there was no air in there and I will bleed using the 2 man method again this weekend.

Is it true that you should not push the foot pedal to the floor during bleeding or not?

 

[Dan1720v]

It's true. You can either tear the servo diaphragm, or if you push too quick/return the caliper piston too fast you can flip the seals in the master cylinder.

 

[james.l]

There are 2 bleed valves on the M/C AFAIK. one is easier than the other to get to. 7mm deep socket should be what you need.

 

[Steely]

It's true. You can either tear the servo diaphragm, or if you push too quick/return the caliper piston too fast you can flip the seals in the master cylinder.

im living proof - dead servo'd about 2 years back, my own fault by pumping to the floor

you can pump the pedal to bleed, but only 60% travel, do not floor it!

 

[aymen_a22]

This may be a little late however I have driven with it and the brakes still work and the fluid is not dropping. How would I know If the servo is damaged?

 

[Dan1720v]

Stiff brake pedal.

 

[cupra-barn]

Did you bleed the clutch as well? I had this problem after bleeding, all was resolved by bleeding the clutch on the nipple by the gear box.

 

[aymen_a22]

The brake pedal is still working (not stiff) so I might be in luck!

I have not bled the clutch yet either so I will do that later today.

Can someone tell me the exact order of what to bleed when please?

 

[james.l]

Rear left
Rear right
Front left
Front right
Clutch
Master cylinder

That is the order that I would do them

If you have got brembos make sure you bleed from top and bottom

 

[tom t]

Brembos top and bottom??? More info please dude

 

[james.l]

I didn't mean top and bottom, sorry! The brembos have got 2 bleed nipples. Front and back

 

[tom t]

Was gana say, you had me worried for a minute. Just done them yesterday

 

[clarky5178]

How do you bleed the clutch on these cars. Just the same as the rest of them crack it and pump the pedal in and out slowly?

 

[Seatmann]

aymen have you not gone and bought a pressure bleeder yet? Get it done.

 

[aymen_a22]

Well I have been looking but decided to do it the old fashioned way with 2 people.

I made sure the person in the car did not press to the floor and I rebled the whole car following the following procedure.

1: Bleed the Rear Left
2: Bleed the Rear Right
3: Bleed the Front Left
4: Bleed the Front Right
5: Bleed the Clutch (Pump 10 times fast and hold, Open the bleed nipple and when it sinks to the floor lock the nipple, repeat this about 10 times)
6: Bleed the Master Cylinder

Job done. The pedal feels really sharp. It still moves a little before it begins to brake but at slow speeds you can feel it working and at high speeds the pedal is nice and firm and the braking ability now feels very good and confident.

Thanks for all the help, once again I could not have done it without the assistance. (I think bleeding the master cylinder is what did it).

 

[Captain Cupra]

Pressure bleed is by far the most effective way, it's a piece of cake then