spannering your worst mistakes
spannering your worst mistakes
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Purosangue

Original Poster:

1,634 posts

33 months

Yesterday (16:35)
quotequote all
owned lots of classics so very used to changing brake parts , bleeding brakes etc.

So on the trusty Mitsubishi outlander PHEV mk3 2016 , at 126,000 miles thought time to replace the pads and discs , had noticed the rears where binding , so with new Bilstein calipers at £ 60 each , Bilstein discs at £25 and pads £26 . bought a set from Germany . , plus 2 litres of dot4 brake fluid . ( manual hand brake not electric)

removed each side and manually bled the brakes with son in passenger seat , had a nice flow of oil with no bubbles at the calipers , topping up resevoir as required. .

Then started engine brake straight to the floor , checked resovoir , low so topped up . tried again same thing vacumm pump engaging . brake marginally better , left overnight. cold morning started car , once heated up heard vacumm pump brake service required light illuminated checked resevouir .... almost empty !! . Topped up , so by now nearly 2 lites of brake fluid used. pedal still not right .. Called AA as we had home service , chap said fairly sure to bleed the brakes it has to be done with car plugged in .OBD

He was right we plugged in and followed the procedure .........all good ....err no on completion had good brakes drove around the block all good .
AA left . The following morning drove a mile to the local Screwfix on the journey , the brake service required light illuminated again but this time the brake pedal went to floor ......with no brakes .. luckily no other traffic around so Hazard lights on . and used the regenetrive braking mode on the car to slow down using the engine to slowly getting the cas back home using hand brake . parked up and booked in to local dealership for service

guessing that the brake master cylinder seals have failed with the brake fluid being sucked into the brake booster and vacumn ... will wait to see thge outcome

Edited by Purosangue on Friday 12th December 16:38

droopsnoot

13,892 posts

262 months

E-bmw

11,778 posts

172 months

Purosangue said:
owned lots of classics so very used to changing brake parts , bleeding brakes etc.

So on the trusty Mitsubishi outlander PHEV mk3 2016 , at 126,000 miles thought time to replace the pads and discs , had noticed the rears where binding , so with new Bilstein calipers at £ 60 each , Bilstein discs at £25 and pads £26 . bought a set from Germany . , plus 2 litres of dot4 brake fluid . ( manual hand brake not electric)

removed each side and manually bled the brakes with son in passenger seat , had a nice flow of oil with no bubbles at the calipers , topping up resevoir as required. .

Then started engine brake straight to the floor , checked resovoir , low so topped up . tried again same thing vacumm pump engaging . brake marginally better , left overnight. cold morning started car , once heated up heard vacumm pump brake service required light illuminated checked resevouir .... almost empty !! . Topped up , so by now nearly 2 lites of brake fluid used. pedal still not right .. Called AA as we had home service , chap said fairly sure to bleed the brakes it has to be done with car plugged in .OBD

He was right we plugged in and followed the procedure .........all good ....err no on completion had good brakes drove around the block all good .
AA left . The following morning drove a mile to the local Screwfix on the journey , the brake service required light illuminated again but this time the brake pedal went to floor ......with no brakes .. luckily no other traffic around so Hazard lights on . and used the regenetrive braking mode on the car to slow down using the engine to slowly getting the cas back home using hand brake . parked up and booked in to local dealership for service

guessing that the brake master cylinder seals have failed with the brake fluid being sucked into the brake booster and vacumn ... will wait to see thge outcome
If you have used that much fluid it must be leaving the closed system somewhere, that being the case it should be pretty easy to find where it is going.

Check every fitting you worked on for evidence of fluid in the first instance.