spongy pedal

[poriordan]

i seem to have a spongy pedal under hard braking as in i hit the pedal it then sinks an inch then brakes are on was thinking air in system if so whats the best fluid to replace because wanna flush old fluid for new is there a guide. thanks in advance phil

[Jonny1*2]

Decent dot4 mate. Sounds like its due a change. There is a guide in the section

[jengis]

Worth doing your fluid, definately. Loads of advice on bleeding on here, just be careful not to get air into the system.

Also check that your pads are free to move in the caliper, not wedged tight through poor fitment or a build up of dust and corrosion.

[poriordan]

ok thanks got an easy bleed what recon on tht

[jengis]

ok thanks got an easy bleed what recon on tht

I've used one in the past when I had pugs, a bit fiddly to set up but worked ok really (10 psi is plenty, don't over pressurise)

Never tried the kit with the clio as I prefer to gravity bleed now - takes a while but effortless process if your cars up on stands and your on with other jobs. Don't think it's a popular way though?

[Thecupkid]

Personally I think it's the person behind the pedal lol

[chopper1708]

Hi guys, I've recently replaced the rear hub/disks and pads on the rear of my RS172, and the O/S handbrake cable. And since then the brakes have been spongy and soft, and less effective. When we wound the caliper pistons back there was no sign of fluid leakage, and nor has there been since. Despite this we have bled all four calipers with no sign of air coming out of the system, we replaced approx 400ml of brake fluid. Any ideas as we're puzzled. Thanks in advance. Any help would be much appreciated

[Owen_m]

bleed it using a pressure bleed kit (from halfords) may be air stuck in the pipe somwhere. worked for me

[chopper1708]

Thanks mate. Are they pricey?!

[poriordan]

^^ nope not at all mate bout 20 - 25 i think

[chopper1708]

Thanks

[Owen92]

Did you remove the brake fluid reservoir cap before you pushed the caliper back?

[scoop172]

I always do

[Jeff simply]

Air or brake lines perhaps depending on the condition.

[chopper1708]

Yeah the caliper was all back in place mate, wheel on, before we did any bleeding.

[Owen92]

i meant did you remove the brake fluid cap before pushing the piston back in the caliper because if not it can damage seals from trying to compress the fluid

[chopper1708]

The pistons seemed to push back with little effort, and no evidence of fluid seeping past the piston seals. ;\