Spongy brakes???

[GTS]

so you still have spongy brakes?..did you re bleed them back to front this time?

Bled twice the right way round.....still hittin a sponge.

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If you have fitted a master cylinder off a different model, never mind the reservoirs and pipes being back to front, but also bear in mind that diameters may be different between models or break points in production also.

I bought it from Autopro and they said it was the recommended replacement.

Did you over haul your front calipers and replace the pistons?

I put a seal kit through them and everything seemed to be OK. I used the original pistons.

Another thing to t is the bleeding technique, where you have an assistant pump the pedal vigourously and then have them count 1! 2! and on three,snap open the bleeder before they stomp hard on the pedal. This can often dislodge air pockets in some systems.

I did a gravity bleed to the l/h rear then got Mrs GTS to pump the pedal. I'm confident we got all the air out of the system.

All other advice offered by other members has been good too, assuming you have adequate knowledge on brake systems fundamentals.

I've been in the automotive and earthmoving equipment spares business since 1978. I've rebuilt more cars than I care to remember so I'm pretty confident that I have adequate knowledge....although this current problem really has me stumped.

as a matter of course, did you bleed the new master on the bench before installation?

I did it when I installed it 12 months (or more) ago and did it again tonight while I had the pipes off it.

I don't mean to sound condesending, but sometimes the most simple things may be the cause. I hope this helps too.

No problems there....I'll take any suggestions at this point.

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BTW are you anywhere near Sydney? I can give you the name of an absolute guru as far as things with brakes, clutches and heads go......

I'm in NSW near Canberra. I've got a few mates in the brake industry...time to give them a call. I didn't ask them before because they are going to take the piss outta me soooooo bad.:errf::errf::(

Thanks for the suggestions anyway.

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So back to my question......is the pushrod between the booster and master cylinder the same length from model to model?