Member Since: 06 Apr 2016
Location: Stockholm
Posts: 10
Problem with brakes after new calipers
It’s an LR 3 2007. I changed all four calipers and all pads, using new after market parts. After bleeding several times, both old school manual and also computer assisted for the ABS, the brake pedal goes almost to the floor at first brake, then feels firm and perfect when pumping the brake a few times.Then again same problem turns up every time I brake and it will not get any better even after 40 - 50 km.
It seems as the calipers goes to long way back after the braking, so I have to push them in position towards the disc, pushing the brake pedal two or three times. i also changed the main brake cylinder.
Anyone got an good answer how to solve this?
21st Mar 2019 9:03 pm
Dazz360
Member Since: 03 Sep 2016
Location: West Mids Walsall
Posts: 873
Silly question but are the callipers the right way round, friend of mine changed his car callipers and didn’t realise the bleed nipple was at the bottom when it should be towards the top
Just a thoughtMetal auto sump & fluid change (3 hrs)
LR door puddle projectors (10 mins)
Tinted Bonnet wind deflector (10 mins)
All Intercooler pipes and Tbolts (2hrs)
3 injectors replaced so far (30mins)
Sunroof drain pipes both sides 2.5 hrs)
Rear discs, shoes,pads,callipers,flexi hoses, rigid brake line, n/s upper hub carrier bush and rear n/s upper arm (13hrs over 2 days)
21st Mar 2019 10:15 pm
Globetrotter448
Member Since: 21 Mar 2017
Location: Londonderry NSW
Posts: 1817
A long brake pedal then working okay after pumping usually indicate air in the system. Start bleeding from the LHR, then RHR, then LHF then RHF
22nd Mar 2019 8:30 am
eightfoot
Member Since: 12 Apr 2015
Location: sunny essex
Posts: 806
do they work even though the pedal goes down if so I would drive it a bit to let the pads bed in as this often happens to me/others when you change all discs/pads and for this reason I normally change an axle set at a time giving them time to bed in then do the other axle (you did degrease the discs didn't you)please excuse any grammer/punctuation mistakes,i'm thick,thankyou
current vehicles 2005 d3 2013 d4
22nd Mar 2019 9:14 am
sutty2006
Member Since: 02 Jun 2016
Location: stoke on trent
Posts: 135
Definately sounds like air in the system. When you pump the pedal, it compresses the air to give you a harder pedal.
22nd Mar 2019 9:53 am
lynalldiscovery
Member Since: 22 Dec 2009
Location: Maidstone
Posts: 7274
Penny to a pound, what is happening is the calliepr piston seals which are square are dry as and are trying to roll in their groove as the piston is pushed out and then rolling back into their correct psoititon and pulling the piston back a knatts cock hence the long first press.
Cure is a syringe with very fine needle and some brake fluid, with the wheel off (obviously!) remove the calliper and turn upside down push the needle through the piston gaiter at the top and inject some brake fluid, not a lot a few drips should do the trick.
Then exercise each calliper in turn, dont pump the piston all the way out
As the needle is so fine the gaiter will self heal
Same trick also works well on noisy ball joints, but using pas oil and not brake fluid
22nd Mar 2019 2:46 pm
Astor
Member Since: 06 Apr 2016
Location: Stockholm
Posts: 10
Problems solved, and a big thanks to all of you. The calipers where actually placed on the wrong side so the bleed nipple pointed down and therefore air could not escape. So obvious, but I could not see it.
Most embarrassing
22nd Mar 2019 9:45 pm
lynalldiscovery
Member Since: 22 Dec 2009
Location: Maidstone
Posts: 7274
Ive done that before with a clutch slave, seemed like such a good idea at the time!
22nd Mar 2019 10:22 pm
yogi972
Member Since: 05 Jun 2011
Location: Kineton
Posts: 3373
Been there done that
22nd Mar 2019 10:52 pm
M3DPO
Member Since: 22 Sep 2010
Location: Notts.
Posts: 8225
Me too, a few years back on a Tranny van . Browny points to Dazz360 It can when others can't,
It will when others won't,
It goes where others don't.
23rd Mar 2019 8:27 am
gstuart
Member Since: 21 Oct 2016
Location: kent
Posts: 14129
lynalldiscovery wrote:
Ive done that before with a clutch slave, seemed like such a good idea at the time!
Fancy doing that , I’ve never put a calliper in upside down, honest I haven’t
23rd Mar 2019 8:48 am
rrhool
Member Since: 28 Aug 2014
Location: Norfolk
Posts: 4519
My views on this post are quite different to some above, and I fully expect to be shot down for them - but here we go.
This is fundamentally not funny.
The OP has undertaken a job that they simply don't have the skills to do. This demonstrates a total mis-understanding of braking systems, and a lack of respect for their safety and others safety.
Putting the calipers on upside down shows a lack of understanding about how the brake fluid (and air) is bled from the system, and to then drive (presumably on public roads) for 40 - 50 Km, shows a total disregard for the issue.
Quote:
.Then again same problem turns up every time I brake and it will not get any better even after 40 - 50 km.
The car should not have been moved from the spot it was in if a decent brake pedal could not be achieved. Soft brakes never get better with distance, and the risk of driving a 2.7 tonne vehicle without brakes is just crazy.
I'm not claiming to have never made a mistake with vehicle maintenance, but some things require a bit more thinking about than others, and if you're unsure, don't take the car on the road.
Rant over.Richard
D3 SE 2007. Triumph 2.5Pi 1973. Ferguson TEA20 1948.
Discovery 2 4.0 ES 2001- Gone
Discovery 1 300Tdi ES '95 - Gone
Range Rover Classic '79 - Gone
23rd Mar 2019 10:14 am
yogi972
Member Since: 05 Jun 2011
Location: Kineton
Posts: 3373
Blimey
Chill man
23rd Mar 2019 3:09 pm
tcr4x4
Member Since: 24 Jan 2010
Location: England
Posts: 1526
A mate of mine took his car to a main Lr dealer for new callipers..
Guess what.. they fitted them the wrong way... some legal threats later he got a very good and long lasting service agreement and compensation.
Just because you wear overalls with a garage name, doesn’t necessarily mean you are any more qualified than a home mechanic.
Everyone makes mistakes.
23rd Mar 2019 5:29 pm
lynalldiscovery
Member Since: 22 Dec 2009
Location: Maidstone
Posts: 7274
rrhool wrote:
My views on this post are quite different to some above, and I fully expect to be shot down for them - but here we go.
This is fundamentally not funny.
The OP has undertaken a job that they simply don't have the skills to do. This demonstrates a total mis-understanding of braking systems, and a lack of respect for their safety and others safety.
Putting the calipers on upside down shows a lack of understanding about how the brake fluid (and air) is bled from the system, and to then drive (presumably on public roads) for 40 - 50 Km, shows a total disregard for the issue.
Quote:
.Then again same problem turns up every time I brake and it will not get any better even after 40 - 50 km.
The car should not have been moved from the spot it was in if a decent brake pedal could not be achieved. Soft brakes never get better with distance, and the risk of driving a 2.7 tonne vehicle without brakes is just crazy.
I'm not claiming to have never made a mistake with vehicle maintenance, but some things require a bit more thinking about than others, and if you're unsure, don't take the car on the road.
Rant over.
Many many garaegs do worse work than your average diy man, most pros are working to times and they will achieve them no matter what, whereas diy man can just plod along.
Ive worked with many a mech who I wouldnt let near my car and they are working on trucks!
Ive seen mechs fit brake pads back to front, mechs reline the whole truck and not adjust the brakes afterwards so when it went out of the workshop they couldnt stop it, the list of scary stuff is endless.
Mechs service a truck and when taking it out of the shop the track rod fell off as the joint was that shagged, yet they had not noticed it when inspecting it!
This is why I always chuckle to myself when people wet their pants as a car has FMDSH
Building trades are the same, Ive never not once had a guy come and do work for me and thought wow that was excellent!
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and are trying to roll in their groove as the piston is pushed out and then rolling back into their correct psoititon and pulling the piston back a knatts cock hence the long first press.
. Browny points to Dazz360 
