Sam
Moderator
Premium Member
Registered: 24th Dec 99
Location: West Midlands
User status: Offline
|
The rear driver's side caliper on the cat (Ford Cougar) was changed over a year ago, about a few months later you can sometimes hear a weird groaning noise if you've stopped, changed into reverse for example and quickly take your foot off the brake pedal. If this is done slowly (i.e. change gear, wait one second, then take foot off the brake pedal) there's no noise.
When the MOT was done recently they said there was only 19% brake efficiency from that corner, and two different places reckon it needs a new caliper again.
Now I just had a thought - ever since we've owned the car the brake fluid has never been changed.
Is it possible, with the symptoms I've described above, that there may be air inside the brake lines ever since the caliper was changed? And if so, would it be worth having the whole fluid replaced?
Just a bit loathed to spend another £200 on a new caliper again when the cause of the problem might be something else (and cheaper/easier to sort).
Thoughts?
|
--ToM--
Member
Registered: 23rd Nov 07
Location: Wirral
User status: Offline
|
It could b drawing air in from the new caliper if not fitted correctly etc , if its drawing air somewhere no point changing fluid and no point changin fluid if the boiling point of the fluids ok
|
Steve
Premium Member
Registered: 30th Mar 02
Location: Worcestershire Drives: Defender
User status: Offline
|
Sounds like abs can you feel it through the pedal ?, faulty sensor maybe
[Edited on 19-06-2011 by Steve]
|
Sam
Moderator
Premium Member
Registered: 24th Dec 99
Location: West Midlands
User status: Offline
|
Don't think so, it's just a really loud noise like someone dragging something heavy across a wooden floor?
|
alan-g-w
Member
Registered: 9th Nov 07
Location: Glasgow
User status: Offline
|
I'd give the pistons a good greasing first of all
|
davieslim
Member
Registered: 15th Sep 08
Location: Glasgow City
User status: Offline
|
Checked, pads,discs,shoes etc? Checked to handbrake cable to make sure its not seized?
|
Steve
Premium Member
Registered: 30th Mar 02
Location: Worcestershire Drives: Defender
User status: Offline
|
Could be anything might even be a spring groaning in the strut
|
Sam
Moderator
Premium Member
Registered: 24th Dec 99
Location: West Midlands
User status: Offline
|
Handbrake cables are a few months old, discs and pads look OK (they were changed last year).
The noise doesn't occur until the car's been driven a while, and also once it's warmed up you can hear brake squeal coming from that corner under mid to full braking.
|
3CorsaMeal
Member
Registered: 11th Apr 02
User status: Offline
|
does the caliper piston move freely with the handbrake?
i have a front caliper that wasn't working very well, and after changing the caliper and still having the problem i found out it was a flexihose that was blocked
|
Jake
Member
Registered: 24th Jan 05
User status: Offline
|
if it is groaning i would say the caliper is binding
|
alan-g-w
Member
Registered: 9th Nov 07
Location: Glasgow
User status: Offline
|
Its the piston making the groaning noise, fiver on it
|
Sam
Moderator
Premium Member
Registered: 24th Dec 99
Location: West Midlands
User status: Offline
|
quote:
Originally posted by 3CorsaMeal
does the caliper piston move freely with the handbrake?
i have a front caliper that wasn't working very well, and after changing the caliper and still having the problem i found out it was a flexihose that was blocked
Would I need to remove the alloy to check this? I can kinda see the caliper through the spokes on the wheel, jacking the car up here and removing the wheel is impossible though due to the slope of the driveway and the road. 
|
Sam
Moderator
Premium Member
Registered: 24th Dec 99
Location: West Midlands
User status: Offline
|
I think I'm just going to take it to the garage and tell them to find out what's causing the problem.
I had a quick look at it yesterday and the flexihose seemed OK. Also, for some reason the pad wear sensor isn't in the pad any more 
|
