Menu toggle

Water collecting behind brake master cylinder in the luggage compartment

Author
Alb
PCGB Member
  • Total Posts : 5
  • Joined: 2013/03/25 16:26:38
  • Status: offline
Alb PCGB Member
2020/11/09 19:01:20 (permalink)

Water collecting behind brake master cylinder in the luggage compartment

After the heavy rain a few weeks back I checked my luggage area for water leaks and found a little bit under the spare wheel but nothing I was worried about and the rubber drain tubes are all clear and doing their job. 
 
But I found water had collected where the brake master cylinder sits, its like a nice little cup that can collect water but I cannot see a way for the water to flow out - I cannot see a drain tube.  It is definitely water and not brake fluid.  Has anyone else had this issue?  Is there a drain tube that I cannot see?
 
Thanks for any help. 

8 Replies

mcgc0
Guest of the Club
  • Total Posts : 801
  • Joined: 2009/04/20 20:33:02
  • Status: offline
mcgc0 Guest of the Club
Re: Water collecting behind brake master cylinder in the luggage compartment 2020/11/10 10:37:10 (permalink)
Can't say I've ever noticed or had this problem. New one to me. Are your lid seal/rubbers all good and not split - especially in the 90o corners?

'90 964 C4 Velvet Red
'94 968 Sport Gaurds Red
'90 964 C4 Slate Grey
'03 Focus ST
'02 Focus ST
Alb
PCGB Member
  • Total Posts : 5
  • Joined: 2013/03/25 16:26:38
  • Status: offline
Alb PCGB Member
Re: Water collecting behind brake master cylinder in the luggage compartment 2020/11/11 09:33:10 (permalink)
Hi, yes rubbers are good no splits but worth a double check.  My guess is that as they have put in drain tubes under the spare wheel and near the ABS unit they expect water to come in during heavy rain.  Will keep looking, may call a few specialist to see of they have come across this before. Will post what I find. 
mcgc0
Guest of the Club
  • Total Posts : 801
  • Joined: 2009/04/20 20:33:02
  • Status: offline
mcgc0 Guest of the Club
Re: Water collecting behind brake master cylinder in the luggage compartment 2020/11/11 09:49:42 (permalink)
Yes, the boot floor will have small rubber grommet drain pipes (visible from underneath) in any (wet) event. However, I see those in most new car boot floor anyway. If the MBC area is all dry of water now run the hosepipe spray gun over the whole front and windscreen area then give 15 mins or so and check again then the whole frunk floor area.

'90 964 C4 Velvet Red
'94 968 Sport Gaurds Red
'90 964 C4 Slate Grey
'03 Focus ST
'02 Focus ST
Alb
PCGB Member
  • Total Posts : 5
  • Joined: 2013/03/25 16:26:38
  • Status: offline
Alb PCGB Member
Re: Water collecting behind brake master cylinder in the luggage compartment 2020/11/11 18:28:35 (permalink)
Thanks, will give that a go at some stage and will post 
Stephenjk
PCGB Member
  • Total Posts : 143
  • Joined: 2017/02/12 19:52:31
  • Status: offline
Stephenjk PCGB Member
Re: Water collecting behind brake master cylinder in the luggage compartment 2020/11/12 08:14:57 (permalink)
Hi have you checked that it isn't water coming out of the concentrated screen wash bottle?  I had a source of water in that area and turned out the one way valves in the washer jets were causing it.  When I used the washer jets it would pump water into the concentrated washer bottle (as well as the screen) and then overflow.  Replacing one way valves cured the issue as they are there to stop this.
mcgc0
Guest of the Club
  • Total Posts : 801
  • Joined: 2009/04/20 20:33:02
  • Status: offline
mcgc0 Guest of the Club
Re: Water collecting behind brake master cylinder in the luggage compartment 2020/11/12 09:38:11 (permalink)
Actually a good point Stephen.
 
I did long while back have a similar problem with the washer jets with one not working at all. The plastic T / Y junction from the washer reservoir to the screen jets has cracked causing water to leak into the bulkhead space. Definitely check for this Alb.

'90 964 C4 Velvet Red
'94 968 Sport Gaurds Red
'90 964 C4 Slate Grey
'03 Focus ST
'02 Focus ST
Alb
PCGB Member
  • Total Posts : 5
  • Joined: 2013/03/25 16:26:38
  • Status: offline
Alb PCGB Member
Re: Water collecting behind brake master cylinder in the luggage compartment 2020/11/15 20:40:51 (permalink)
Hi guys thanks for the washer bottle pointer, I will check that out as I did have a blocked washer nozzle - and I was trying out all the washers before I noticed the water.  Thanks again. 
Alb
PCGB Member
  • Total Posts : 5
  • Joined: 2013/03/25 16:26:38
  • Status: offline
Alb PCGB Member
Re: Water collecting behind brake master cylinder in the luggage compartment 2020/11/26 19:48:28 (permalink)
Hi, I just thought I would update, no luck as yet, the washers jets, pipes, tubes and bottles are not the cause of the water.  I will try the hosepipe over the front and see if that reveals anything. 
Jump to:

Posts made and opinions expressed are those of the individual forum members

Use of the Forum is subject to the Terms and Conditions

Disclaimer

The opinions expressed on this site are not necessarily those of the Club, who shall have no liability in respect of them or the accuracy of the content. The Club assumes no responsibility for any effects arising from errors or omissions.

Porsche Club Great Britain gives no warranties, guarantees or assurances and makes no representations or recommendations regarding any goods or services advertised on this site. It is the responsibility of visitors to satisfy themselves that goods and/or services supplied by any advertiser are bona fide and in no instance can the Porsche Club Great Britain be held responsible.

When responding to advertisements please ensure that you satisfy yourself of any applicable call charges on numbers not prefixed by usual "landline" STD Codes. Information can be obtained from the operator or the white pages. Before giving out ANY information regarding cars, or any other items for sale, please satisfy yourself that any potential purchaser is bona fide.

Directors of the Board of Porsche Club GB, Club Office Staff, Register Secretaries and Regional Organisers are often requested by Club members to provide information on matters connected with their cars and other matters referred to in the Club Rules. Such information, advice and assistance provided by such persons is given in good faith and is based on the personal experience and knowledge of the individual concerned.

Neither Porsche Club GB, nor any of the aforementioned, shall be under any liability in respect of any such information, advice or assistance given to members. Members are advised to consult qualified specialists for information, advice and assistance on matters connected with their cars at all times.

© 2021 APG vNext Commercial Version 4.6