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Gtir Motorsport club » General Discusion » Gtir related Discussion » Cannot get a stiff one

Cannot get a stiff one

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1 Cannot get a stiff one on 30th June 2016, 9:10 pm

alp1983


Folks...

I'm having a mare bleeding my brakes. I must have burned through 2 litres of fluid and can't get a firm pedal. I'm not really seeing any bubbles in the fluid, the odd one here of there and no obvious leaks. If I pump the pedal three times, it's rock solid. If I then wait a couple of seconds and pump again, its spongy and goes all the way to the floor.

I suspect that the ABS pump may have a air lock, but for the life of me I wouldn't know where that is in the engine bay, it's hidden somewhere.

I tried an eezibleed kit with the clamp adapter but that was useless and just emptied the tyre of all it's air.

So i'm at a loss, out of ideas.....

Any suggestions?
-a

2 Re: Cannot get a stiff one on 30th June 2016, 9:13 pm

nomad

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What calipers do you have .... standard ... wilwoods brembos etc ????


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3 Re: Cannot get a stiff one on 30th June 2016, 9:21 pm

alp1983


standard all round, I had the rears rebuilt recently and the fronts were off Bob as I gave my originals away..

4 Re: Cannot get a stiff one on 30th June 2016, 9:38 pm

Gostek

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This is quite old one but it worked for me few times on brakes and clutches...
Try to block brake pedal with block of wood or something and leave it overnight it should force all the air out.


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5 Re: Cannot get a stiff one on 30th June 2016, 9:44 pm

alp1983


ok so if I'm understanding that, I literally push the pedal down and jam it in that position for a period of time? is that with the valves open or shut?

can't see how that would work but i'll give it a go :-)

6 Re: Cannot get a stiff one on 30th June 2016, 9:49 pm

Gostek

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Everything closed mate and don't get it myself but I've had clutch few times that would not bleed at all done this and it was fine... Bloke who sold me this trick was doing it with brakes too ans said that it was working a treat... That is if you haven't got any other faults on your system... You can always try cost you nothing...Just leave it for good few hours


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7 Re: Cannot get a stiff one on 30th June 2016, 9:53 pm

alp1983


thanks v.much, ill do that now....

8 Re: Cannot get a stiff one on 30th June 2016, 10:52 pm

GTI-R US

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Try a mivivac and bleed brakes via that.
Doing it this way by using vacuum instead of pressure will draw any air from the system towards the bleed point you are using ( I generally use n/s front caliper) just keep priming away on the one caliper with brake pedal permanently wedged to floor that way you will draw air from the entire system.
Doing it the conventional way can cause issues as air just gets pushed back and forth never really leaving the system.
Also without teaching you to suck eggs I take it you have calipers on correct way round with bleed nappies at top and not bottom? Only I've seen them put on with nappies at bottom before and you'll never be able to bleed them like that as air will remain in top of caliper housing.


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9 Re: Cannot get a stiff one on 1st July 2016, 6:22 am

johnny gtir

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And I guess it won't affect pedal but you did adjust handbrake piston on rear calipers if they were refurb units

10 Re: Cannot get a stiff one on 1st July 2016, 6:40 am

Mr B

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if pedal creeping all way to floor I would say you got seal issues within master cylinder (MC).
If it old origina MC best place for it is on workbench as an ornament .
ADL Blueprint ADN15127 MC is straight fit replacement .
At age of these cars, brake & clutch master should be considered for replacement whenever got easy access or time & money do it (new ADL parts not too expensive}

If master is good you can bleed them easily by foot, if abs pump got air lock bleed some fluid at pump to try shift it .
Like johnny mentions improper adjust rear caliper pistons make for bad pedal on the R, bad fitting adjustment or faulty piston auto adjuster can cause that .

11 Re: Cannot get a stiff one on 1st July 2016, 10:22 pm

alp1983


Thanks for all the replies guys, I've resolved the issue....

Now I could have walked away from this thread but actually, that wouldn't be karma. Suffice it to say that eggs are officially sucked, I had the bloody things upside down Embarassed When I offered them up originally I guess I must have just thought, well they have to be side matched (the rears are I'm sure) and then thought nothing of it..

Took me all of a bout twenty minutes to switch them over and another 5 to bleed the whole system - rock solid pedal now. Slightly embarrassing - even I can see the irony in calling myself a tool.

Car has been garaged since the meet at Silverstone, was that 2012? Really must make an effort and come to a meet in it...

Forums to the rescue.............

-a

12 Re: Cannot get a stiff one on 1st July 2016, 10:41 pm

nomad

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Glad you sorted the issue .... we all make silly mistakes its what makes us human ..... its a pain with calipers where the bleed nipples are at the bottom i did a motorbike the other week i ended up taking the caliper out wedging a piece of wood in between the pads and bleeding it then put back on took only a few goes to bleed it my mate took about an hour then gave up because it wouldnt bleed through with it in place .....


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13 Re: Cannot get a stiff one on 2nd July 2016, 6:04 am

johnny gtir

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Ha ha tool. No just joking. Some boy is Bob I would never of suggested that. Thought on a standard system there is not a great lot that stops it bleeding up. That's what the forum for help each other and have a laugh along the way. Any pictures of your car ? And yes get it sorted

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