Brake problem

Forum for wheels, tyres, suspension, chassis, brakes
Post Reply
Jimqashqai
Posts: 2
Joined: Sat Aug 04, 2018 8:50 am
Qashqai Model: Mk.1 Qashqai Facelift - J10b (2010–2013)

Post by Jimqashqai »

Hello all
Qashqai 1.5dci J10 minor facelift 2010

The issue is a sinking brake pedal, to the floor which improves with a couple of pumps, then sinks again.

My first thoughts were master cylinder so I have replaced that with one from a breaker, and fully bled through the system. It’s still the same.
Now I appreciate that a used master cylinder COULD be faulty and have the same issue, BUT is there anything I’m missing here?

Pedal stiffens when the engine is not running and drops on starting the engine as it should. However if pressure held on when not running it sinks the same as when running.

Any ideas or thoughts welcome.

User avatar
MikeGC
Posts: 1850
Joined: Tue Feb 07, 2017 11:50 am
Location: Stockport
Qashqai Model: Mk.3 Qashqai - J12 (2021+) New Model

Post by MikeGC »

Can’t help with your question but welcome to the forum
March '22 - J12 1.3DIG-T 160 CVT Tekna+ with all wheel drive - Pearl Black
July '19 - J11B 1.3DIG-T 160 DCT Tekna - Vivid Blue
March '17 - Qashqai J11A 1.5dci n-connecta - gunmetal
September '14 - Juke 1.5dci gunmetal ascenta premium (red accent packs)
User avatar
gloucester
Posts: 5173
Joined: Sun Apr 03, 2016 7:04 am
Location: Gloucestershire, England
Qashqai Model: Mk.2 Qashqai - J11 (2013–2017)

Post by gloucester »

Welcome to this forum.

I had the same problem on the first of my Fabias - the dealer said "They all do that!" - I couldn't prove otherwise and technically I can't answer sorry.
(2015 Nissan Qashqai Tekna DIG-T 1.2 sold 15/6/18) ~ 2018 Suzuki Ignis SZ5 - 2018 Yamaha MT-07 ~ (2024 Volvo EX30 ordered)
Qashowner
Posts: 564
Joined: Wed Apr 17, 2019 10:07 am
Qashqai Model: Mk.2 Qashqai - J11 (2013–2017)

Post by Qashowner »

It could well be the barke fluid is well past it's sell by date and needs changing. Over time the brake fluid detereoates and needs to be replaced. This is usually done at major services I think. But certainly every couple of years.
Past cars Mercedes B Class, S Class, E Class Estate, E Class Coupe, G Wagen, 260E interspersed with Peugeot 406 and Audi Coupe.
User avatar
gloucester
Posts: 5173
Joined: Sun Apr 03, 2016 7:04 am
Location: Gloucestershire, England
Qashqai Model: Mk.2 Qashqai - J11 (2013–2017)

Post by gloucester »

Jimqashqai wrote: Sun Jan 23, 2022 5:37 pm
Any ideas or thoughts welcome.

Did you solve it?
(2015 Nissan Qashqai Tekna DIG-T 1.2 sold 15/6/18) ~ 2018 Suzuki Ignis SZ5 - 2018 Yamaha MT-07 ~ (2024 Volvo EX30 ordered)
Deleted User 10757

Post by Deleted User 10757 »

When the Master Cylinder was replaced , then I guess you bled the system with new fluid.
A few Questions.


What order did you bleed the system
Did you push the fluid out or suck it out
Did you bleed by pumping the brake pedal
Did the ABS pump get activated to ensure no air was trapped in the valve bank
Post Reply