Cooked brakes, how do I sort it out?

[heavyd]

Deep down you know the answer though. 

http://www.mk5golfgti.co.uk/forum/index.php/topic,31194.0/topicseen.html 

I would love to buy those, but the thought that it might need a new servo is holding me back. I dont think they'll fit under pescaras either, so would need spacers and brake lines, caliper carriers etc. I think if I was going to go BBK, I'd probably just go for a brand new r32 setup for £655

[Hedge]

But those aren't the BIG Porsche kit they are the NQSBBK. 

[john_o]

i might be being stupid here, but if no lines have been opened how have you truly flushed all the 'old' fluid out of the system?

[tony_danza]

Did you bleed the system with VAGCOM, so it does all the ABS etc too??

Quick question and hopefully not too off-topic but is recycling of the ABS pump with VCDS really necessary? I heard one story about old brake fluid hiding in there but another from a techie I think saying that it was nonsense as the ABS pump was in an 'open' state when inactive such that when pushing new fluid through the system it also pushes through the pump. Can someone clear this up?

If there's a procedure to follow, then it's there for a reason.  

[heavyd]

i might be being stupid here, but if no lines have been opened how have you truly flushed all the 'old' fluid out of the system?

I meant brake lines, obviously bleed nipples were opened slightly, 1.5 litres of ATE blue fluid, fluid coming out of all calipers were dark blue.
Pedal is solid, just not enough pressure is being exerted onto the discs when you press the pedal. Done over 50 miles on these pads, and they havent even made a wear mark on those new front discs that I fitted. I have to stamp hard to get the car to stop.

[StuF]

Do you think its possible with the heat generated when your disks overheated the calipers themselves may have been damaged, perhaps the piston is a little warped out of shape or just stiff in the caliprt? giving you the vague braking rather than a progressive feel? Just an idea

[john_o]

ah ok fair enough then. 
maybe worth another flush after a few more miles.

i dont suppose you now have a servo assistance failure?
if you pump the pedal (engine off) it should go hard , keep it depressed and start the car, does the pedal move away from you and gain a spongy dead first inch or so? (it should do, as the vacuum builds and the assitance kicks in)
Although without assitance its very hard to stop at all 
Id the cars idle ok? recently fitted any pcv stuff? maybe the vacuum to the servo has been compromised???

[heavyd]

ah ok fair enough then. 
maybe worth another flush after a few more miles.

i dont suppose you now have a servo assistance failure?
if you pump the pedal (engine off) it should go hard , keep it depressed and start the car, does the pedal move away from you and gain a spongy dead first inch or so? (it should do, as the vacuum builds and the assitance kicks in)
Although without assitance its very hard to stop at all 
Id the cars idle ok? recently fitted any pcv stuff? maybe the vacuum to the servo has been compromised???

Yep pedal goes hard when engine off after 3 pumps, then when engine is turned on, pedal drops quite a bit actually. Going to see if I can find my old pcv, I put a new one on in february, but there wasnt anything wrong with the old one. I was thinking maybe the caliper seals might be damaged? Also thinking about getting a brand new R32 brake kit, its only the fact I now have 2 new sets of 312 discs and new set of ds2500s thats putting me off

[john_o]

if we assume your servo is working ok based on that info (and im not mechanic!), then maybe its time to confirm the action of the calipers (front) manually for each side. just remember to have something jammed in there so you dont pop the caliper pistons out ! and can lever them back in.
Theres obviously something wrong so you dont have to change to bigger brakes yet (but they do help lol), besides if it isnt the brakes and its something else (servo?) then you may still have the same issue....

lets get them back to normal first

[MAT ED30]

Why not just pop the wheel off and take the pads out and check the pistons won't take you more than 20 min to do and then you can also check how your pads have worn as if they have worn uneven you know you have a problem

[heavyd]

oh well, another one ruled out, pistons came out fine, nice and even
I put the ds2500s back in to see if they can bed the discs in any better than the pagids. also bled another 0.5 ltrs of fluid out with no bubbles.
Looks like I'm going to have to go to the dealers with this one my local place only does the gravity bleed method for some reason
Thanks for the help anyway folks

[john_o]

well youve done your best. 
Id try the flush with VCDS that danza suggested too.
given its servo, fluid and working pistons i cant see what else is wrong (unless the servos fubarred)
give it some time with the new fluid and see how it progresses

[heavyd]

got it booked into the stealers on monday
they said its £75 just to have a look at it, then any labour or parts is extra on top of that
At least I'll find out whats wrong with it for definite!

[Andy]

And a empty  bank balance mate,there is a garage near croft circuit who does johnny c car who are good,called acr will be cheaper

[heavyd]

And a empty  bank balance mate,there is a garage near croft circuit who does johnny c car who are good,called acr will be cheaper

Might look into them instead
thanks andy