Water collecting behind brake master cylinder in the luggage compartment

[Alb]

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.

 

[mcgc0]

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?

 

[Alb]

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]

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.

 

[Alb]

Thanks, will give that a go at some stage and will post

 

[Stephenjk]

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]

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.

 

[Alb]

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]

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.