No brakes!!

Moderators: erikscimitardemon, philhoward, Lukeyboy46, Roger Pennington

No brakes!!

Postby raynernick » Tue Feb 14, 2017 11:05 pm

Decided to give the old girl a run today.
Pushed out of garage to start - jumped in to stop the roll and NO BRAKES!

Both front callipers and rear pistons are new/ recon and done properly. There is ample brake fluid and no visible leaks on a quick inspection.
No pools where the car has been standing.
The fluid is not disappearing from the reservoir on pumping the pedal.
The pedal is straight to the floor with no resistance.
Car last ok on Dec19th

Would this point to the master cylinder?
How easy are the to replace and what one (girling) please?

Maybe you think the problem is something else?

Thanks Nick
raynernick
 
Posts: 133
Joined: Mon Jan 29, 2007 12:27 pm
Has thanked: 1 time
Been thanked: 1 time

Re: No brakes!!

Postby peter freeman » Tue Feb 14, 2017 11:19 pm

I think the repair kit might be SP 2134
User avatar
peter freeman
RSSOC Member
 
Posts: 8407
Joined: Thu Aug 31, 2006 12:12 pm
Location: Newcastle
Has thanked: 14 times
Been thanked: 266 times

Re: No brakes!!

Postby scimjim » Tue Feb 14, 2017 11:24 pm

Definitely points to the MC if they're not pumping up and you're not losing fluid - total seizure of all 4 corners would be really bad luck!
Jim King

Current: SE5 (8Ball), 1600 SS1 (G97), 2.5TD SE5a (diesel 5a), 6 x random other SS1s.
Previous: SE5, 3 x SE5a, 2 x SE6a, 3 x SE6b, GTC, 2.9i GTC, 3 x 1600 SS1, 1300 SS1, Mk1 Ti Sabre, Mk1.5 CVH Sabre
Chief mechanic for: SE6a (Katrina), 1400EFi SS1 (Grawpy), Sabre/MX5 auto (The Flying Broomstick), 1400 K series SS1 (Megan3), TI SS1 (snotty), 1300 SS1 (Number One) & Sarah's coupe.
CURE THE FAULT - NOT THE SYMPTOMS
User avatar
scimjim
RSSOC Member
 
Posts: 32300
Images: 0
Joined: Sun Oct 01, 2006 10:08 pm
Location: Gloucester
Has thanked: 94 times
Been thanked: 676 times

Re: No brakes!!

Postby BusaPhill » Tue Feb 14, 2017 11:33 pm

May be worth just undoing the master off the servo and seeing if there's brake fluid inside the servo.
May be a servo rebuild on the cards as well.
1979 Scimitar SE6A V6 3.1Auto
2005 Mercedes C320 V6 3.0 Diesel (Daily Driver).
BusaPhill
RSSOC Member
 
Posts: 87
Joined: Sun Jun 28, 2015 10:28 pm
Location: Sutton,Surrey.
Has thanked: 2 times
Been thanked: 1 time

Re: No brakes!!

Postby Roger Pennington » Wed Feb 15, 2017 3:29 pm

BusaPhill wrote:May be worth just undoing the master off the servo and seeing if there's brake fluid inside the servo.
May be a servo rebuild on the cards as well.


Don't forget this is a Coupe, so unless it's been modified, it has a remote servo, the master cylinder isn't actually attached to the servo. Having said that, fluid could still be leaking from the servo cylinder into the body of the servo itself, and fluid could (I believe) leak out of the master and through the bulkhead to hide behind the carpets in the footwell. However in this case, Nick does say there's no visible loss of fluid, which I think tends to point to MC failure as per Jim's suggestion :)
....Roger

RSSOC member (since 1982)
- - - - - - - - - - - - - - - - -
Image

"Condition can be bought at any time; Originality, once lost, is gone forever" - Doug Nye
User avatar
Roger Pennington
RSSOC Member
 
Posts: 18269
Images: 0
Joined: Tue Aug 29, 2006 9:43 pm
Has thanked: 85 times
Been thanked: 424 times

Re: No brakes!!

Postby raynernick » Wed Feb 15, 2017 10:15 pm

thank you everyone. I will have a good look over the next few days.
My coupe is unmodified.

Nick
raynernick
 
Posts: 133
Joined: Mon Jan 29, 2007 12:27 pm
Has thanked: 1 time
Been thanked: 1 time

Re: No brakes!!

Postby Coupe' Racing » Thu Feb 16, 2017 7:05 pm

Roger Pennington wrote:
BusaPhill wrote:May be worth just undoing the master off the servo and seeing if there's brake fluid inside the servo.
May be a servo rebuild on the cards as well.


Don't forget this is a Coupe, so unless it's been modified, it has a remote servo, the master cylinder isn't actually attached to the servo. Having said that, fluid could still be leaking from the servo cylinder into the body of the servo itself, and fluid could (I believe) leak out of the master and through the bulkhead to hide behind the carpets in the footwell. However in this case, Nick does say there's no visible loss of fluid, which I think tends to point to MC failure as per Jim's suggestion :)



There is a sort of repeater master cylinder attached to a Girling Powerstop servo
Attachments
Servo Girling MKIIB.jpg
Servo Girling MKIIB.jpg (6.67 KiB) Viewed 435 times
Blessed are the Cheese makers

Better to be an hour early than 1 minute late
User avatar
Coupe' Racing
RSSOC Member
 
Posts: 6595
Images: 10
Joined: Mon Jul 23, 2007 10:51 pm
Location: Nr Telford - Shropshire
Has thanked: 0 time
Been thanked: 91 times

Re: No brakes!!

Postby Roger Pennington » Thu Feb 16, 2017 7:36 pm

Yes, that's right - that's what I was referring to on the second line of my note :)
....Roger

RSSOC member (since 1982)
- - - - - - - - - - - - - - - - -
Image

"Condition can be bought at any time; Originality, once lost, is gone forever" - Doug Nye
User avatar
Roger Pennington
RSSOC Member
 
Posts: 18269
Images: 0
Joined: Tue Aug 29, 2006 9:43 pm
Has thanked: 85 times
Been thanked: 424 times

Re: No brakes!!

Postby gordini5 » Thu Feb 16, 2017 7:56 pm

Glad to hear you discovered the problem at low speed. I've little knowledge of the master cylinder/servo workings so other than regular fluid and periodic filter changes, as a novice, is there any way of identifying any potential problems early or is it very unusual for them to fail suddenly like this? Mine is an early 5a.
gordini5
RSSOC Member
 
Posts: 195
Images: 4
Joined: Tue Nov 06, 2012 8:20 pm
Location: Inverness-shire
Has thanked: 9 times
Been thanked: 5 times

Re: No brakes!!

Postby Coupe' Racing » Thu Feb 16, 2017 9:09 pm

Roger Pennington wrote:Yes, that's right - that's what I was referring to on the second line of my note :)

I mis understood I thought you were referring to the one on the bulkhead
Blessed are the Cheese makers

Better to be an hour early than 1 minute late
User avatar
Coupe' Racing
RSSOC Member
 
Posts: 6595
Images: 10
Joined: Mon Jul 23, 2007 10:51 pm
Location: Nr Telford - Shropshire
Has thanked: 0 time
Been thanked: 91 times

Re: No brakes!!

Postby raynernick » Thu Feb 16, 2017 11:04 pm

I have a master cylinder on the way and will report back. Fairly sure the servo is ok.

Thanks
Nick
raynernick
 
Posts: 133
Joined: Mon Jan 29, 2007 12:27 pm
Has thanked: 1 time
Been thanked: 1 time

Re: No brakes!!

Postby raynernick » Fri Feb 17, 2017 8:54 pm

Ok - I have the master cylinder. It looks an easy fit.
Is this the case or are there large "bewares" I should know.
Thanks
Nick
raynernick
 
Posts: 133
Joined: Mon Jan 29, 2007 12:27 pm
Has thanked: 1 time
Been thanked: 1 time

Re: No brakes!!

Postby Coupe' Racing » Fri Feb 17, 2017 9:06 pm

Hope it's the same bore size
Anyway bleeding the brakes needs a tip
Use a pressure bleeder , and the first thing to do is to crack each Union from the outlet of the bulkhead cylinder in turn until you reach the output pipe of the cylinder on the servo then bleed the brakes as normal
Blessed are the Cheese makers

Better to be an hour early than 1 minute late
User avatar
Coupe' Racing
RSSOC Member
 
Posts: 6595
Images: 10
Joined: Mon Jul 23, 2007 10:51 pm
Location: Nr Telford - Shropshire
Has thanked: 0 time
Been thanked: 91 times

Re: No brakes!!

Postby raynernick » Fri Feb 17, 2017 9:19 pm

Same bore size - Girling 0.875
raynernick
 
Posts: 133
Joined: Mon Jan 29, 2007 12:27 pm
Has thanked: 1 time
Been thanked: 1 time

Re: No brakes!!

Postby rich001 » Fri Feb 17, 2017 11:40 pm

Brakes gone on mine, have been shunting it in and out the garage to do bits and bobs as garage is not very wide when my foot went right down to the floor, had to use the hand brake to stop me going off the drive and into the road. Was going to fit a new downpipe i bought from QRG but just reversed it straight back in. Stuff it lol Getting motor towed to my cousins garage for electrics to be sorted head gasket soldering, down pipe change and brake pipes sorting, oh for the love of cars.
72 SE5a
rich001
RSSOC Member
 
Posts: 35
Joined: Sat Aug 27, 2016 3:56 pm
Location: Nottinghamshire
Has thanked: 1 time
Been thanked: 1 time

Next

Return to Coupé

Who is online

Users browsing this forum: No registered users and 1 guest

cron