Rock hard brake pedal !!!

Shocks, springs, anything to do with the running gear

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dirtydirtydiesel
3.0 24v
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Joined: Sun Apr 28, 2013 11:02 pm
Location: Coalville, Leics.

Rock hard brake pedal !!!

Post by dirtydirtydiesel »

As the title state's
Jumped in the old girl tonight after work, drove across the car park put my foot on the brakes :shock:
W.T.F rock hard brake pedal & no brakes :shock: , managed to get her to stop ( luckily I wasn't going very fast)
Pressed the brake pedal really hard & it worked :roll:
Pumped them a few time's before driving home very gingerly :?
I have no faith in them now, Anyone got any ideas / heard of this before

All advice appreciated, many thanks DDD.
2002 110 HDi estate, Rapier in monaco blue! ( found quite a bit more power :cheesy: ) for sale
1999 3.0 V6 SE coupe in Diablo Red ( my baby ) sold
2006 206 1.4 16v sport in Aegean blue ( wife's shopping trolley :roll: )

2006 BMW e61 535d m-sport :supafrisk: run's for cover :lol:
trem1
3.0 24v
Posts: 1835
Joined: Sat Dec 31, 2005 2:32 pm
Location: south shields,tyneside

Re: Rock hard brake pedal !!!

Post by trem1 »

Was the vac pump on my first 407,scared the sh*t out of me when it first did it.

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2004 Iron Grey 407se 136bhp......Written Off
2006 Moonstone blue 407 se 136 bhp.....Written off
2006 silver 407 SW..........replacement
frog
2.0 Turbo
Posts: 281
Joined: Sun Aug 24, 2014 12:18 pm
Location: Netherlands

Re: Rock hard brake pedal !!!

Post by frog »

Same problem as this one?
Or would have except the pedal didn't move! Luckily I was going slowly and the handbrake managed to bring it to a halt. Moved off, very slowly and applied brakes again, pedal went down but I could feel it grinding a bit through the pedal. Managed to limp it home through the quiet backstreets and have left it there since, it was just downright bloody dangerous!
Current "fleet":
2003 406 Estate 2.0HDi 110 - 7 seater
2001 Citroen Saxo 1.6i 8v 100

Previously owned:
2000 406 Sedan 2.0 HDi 90
2000 406 Coupé 2.0i 16v 138 - Riviera Blue

PP2000 user, can help with faults / diagnostics in the Netherlands.
PeterN
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Location: Charmouth, Dorset

Re: Rock hard brake pedal !!!

Post by PeterN »

Yes sounds as though have no vacuum, the brakes aren't very good without it :shock: Either the vacuum pump as mentioned or the brake servo or a vacuum leak somewhere. If its an Hdi there won't be much turbo boost either, just changed mine for that reason and it improved the brakes as well. Check the solenoids on the bulkhead behind the top of the engine for leaking rubber pipes.

Peter
dirtydirtydiesel
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Posts: 1425
Joined: Sun Apr 28, 2013 11:02 pm
Location: Coalville, Leics.

Re: Rock hard brake pedal !!!

Post by dirtydirtydiesel »

Thanks for the imput guys,
No frog not like that,
Quite sure now having been reading up on the subject that the servo non return valve is fubared :roll:
Spoke to my local steelers, gonna order one in the morning.

I'll post up the results.
2002 110 HDi estate, Rapier in monaco blue! ( found quite a bit more power :cheesy: ) for sale
1999 3.0 V6 SE coupe in Diablo Red ( my baby ) sold
2006 206 1.4 16v sport in Aegean blue ( wife's shopping trolley :roll: )

2006 BMW e61 535d m-sport :supafrisk: run's for cover :lol:
DefTrap
1.8 8v
Posts: 30
Joined: Thu Nov 24, 2011 12:07 am
Location: SW coast France

Re: Rock hard brake pedal !!!

Post by DefTrap »

Think the servo non return valve has gone on my HDI 90 as well.

These parts are hard to track down online or am I searching for the wrong thing?

Can anyone point me in the right direction? If someone has the p/n for a servo check valve for a 2002 HDI 90 that would be grand.
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steve_earwig
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Re: Rock hard brake pedal !!!

Post by steve_earwig »

Looks like
4599 31 BRAKE AMPLIFIER KIT
BOSCH. -
- EXCEPT EW10D INJECTION
vacuum valve.jpg
Not sure if this is right but it's where I'd expect to find it...
Unskilled meddling sin©e 2007

2004 D9 2.0 HDi 110 Estate lhd VF38ERHZF81657352 - sold but being very well looked after.
1991 Yamaha TDM850 - pretending to be 425cc single :frown:
2008 Toyota Recall4 2.0 VVTI ATM LHD JTMBH31V90D007261 - flimsy piece of crap.
1953 Matchless G3LS - It's alive!!
dirtydirtydiesel
3.0 24v
Posts: 1425
Joined: Sun Apr 28, 2013 11:02 pm
Location: Coalville, Leics.

Re: Rock hard brake pedal !!!

Post by dirtydirtydiesel »

Yup , that's what I bought steve :D
2002 110 HDi estate, Rapier in monaco blue! ( found quite a bit more power :cheesy: ) for sale
1999 3.0 V6 SE coupe in Diablo Red ( my baby ) sold
2006 206 1.4 16v sport in Aegean blue ( wife's shopping trolley :roll: )

2006 BMW e61 535d m-sport :supafrisk: run's for cover :lol:
DefTrap
1.8 8v
Posts: 30
Joined: Thu Nov 24, 2011 12:07 am
Location: SW coast France

Re: Rock hard brake pedal !!!

Post by DefTrap »

steve_earwig wrote: Mon Apr 09, 2018 5:09 pm Looks like
4599 31 BRAKE AMPLIFIER KIT
BOSCH. -
- EXCEPT EW10D INJECTION
vacuum valve.jpg
Not sure if this is right but it's where I'd expect to find it...
Awesome, thanks.
DefTrap
1.8 8v
Posts: 30
Joined: Thu Nov 24, 2011 12:07 am
Location: SW coast France

Re: Rock hard brake pedal !!!

Post by DefTrap »

dirtydirtydiesel wrote: Mon Apr 09, 2018 11:08 pm Yup , that's what I bought steve :D
Was that the part that fixed the issue on yours in the end?
dirtydirtydiesel
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Posts: 1425
Joined: Sun Apr 28, 2013 11:02 pm
Location: Coalville, Leics.

Re: Rock hard brake pedal !!!

Post by dirtydirtydiesel »

It was this time round for me but it can also be the servo it's self and or the vacuum pump.
I just went for this first as it's the easiest and cheapest. :)
2002 110 HDi estate, Rapier in monaco blue! ( found quite a bit more power :cheesy: ) for sale
1999 3.0 V6 SE coupe in Diablo Red ( my baby ) sold
2006 206 1.4 16v sport in Aegean blue ( wife's shopping trolley :roll: )

2006 BMW e61 535d m-sport :supafrisk: run's for cover :lol:
stevewalsh
2.0 16v
Posts: 122
Joined: Wed Apr 21, 2010 10:30 am
Location: SW France

Re: Rock hard brake pedal !!!

Post by stevewalsh »

Replaced servo on mine, Not an easy job with the engine in
PeterN
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Location: Charmouth, Dorset

Re: Rock hard brake pedal !!!

Post by PeterN »

Failure of the vacuum pump will affect the turbo boost as well, so if yours goes OK it will be a servo fault.

Peter
DefTrap
1.8 8v
Posts: 30
Joined: Thu Nov 24, 2011 12:07 am
Location: SW coast France

Re: Rock hard brake pedal !!!

Post by DefTrap »

Well the garage diagnosed mine as a servo issue, so they're doing it today. ;)
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steve_earwig
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Re: Rock hard brake pedal !!!

Post by steve_earwig »

I hope they're trustworthy...

"Nah, sorry mate, you're gonna need a whole new car." :shock:
Unskilled meddling sin©e 2007

2004 D9 2.0 HDi 110 Estate lhd VF38ERHZF81657352 - sold but being very well looked after.
1991 Yamaha TDM850 - pretending to be 425cc single :frown:
2008 Toyota Recall4 2.0 VVTI ATM LHD JTMBH31V90D007261 - flimsy piece of crap.
1953 Matchless G3LS - It's alive!!
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