I was just wondering; do both of the plenums near the bonnet hinges have the same shape?
The on my driversside (passenger in UK) seems to go straight down, the one on the passengerside (driversside in UK) almost seems like it makes a bend.
I kinda thought both where just straight down....

Sounds like the rubber tube has not been seated correctly.
Should go straight down passing through 2 layers of metal

My plenum drain was blocked under the brake servo. Water was collecting in the drivers side in the plenum, could this cause any water leaks to get in to the car?

Yes if its collecting in the driver side plenum then that must be blocked to or at the very least not letting the water get away quick enough, it can the flow into the pollen filter and get through.

Check this out and cut at 45 degree angle
http://www.the75andztclub.co.uk/foru...ad.php?t=84865

Thank you I will look at cutting the end of it at an angle, but I think this has already been done. Can water get in through to the driver footwell from blocked plenum?

Well yes because it can build up then flow into the internal fan and down into the foot well take a look at the photo's below this will give you an insight to what may happen.

Note in the first pic top right you will see the grey sponge that is the back of the pollen filter box area, that you see in the other pics, so once the plenum tube is blocked it would not take long for the to be breached in my opinion, and sometimes even if you think the plenums look clear by looking through from the driver side with a torch that as been suggested, if the tube is blocked at the outlet part with mud etc then it will soon mount up if like now we have a deluge of rain Arctic

http://www.the75andztclub.co.uk/foru...1&d=1388978909

http://www.the75andztclub.co.uk/foru...2&d=1388978928

http://www.the75andztclub.co.uk/foru...3&d=1388978954

http://www.the75andztclub.co.uk/foru...4&d=1388978996

http://www.the75andztclub.co.uk/foru...5&d=1388979025

Thank you Steve this makes sense now seeing the photos.

You've got me worried now. I. check clean or rod the passenger plenum tube out weekly but I never touch the drivers side one as its not very accessible. Will this cause flooding problems in the plenum chamber or will the water simple drain through the passenger tube instead.
John

Hi Johnny
As long as the passenger side is free of rubbish and as good outlet ie the flaps been cut of at an angle 45 degrees then in my opinion all should be ok, but merely looking into the plenum chamber from the drivers side with a torch and seeing it is clear, will not be enough what if the tube as only just blocked up and it pours down all night and for a few days, this is why it is best to do the spy hole mod, then check at least once a week if not more in really bad weather only takes 5 minutes.

Afternoon chaps
Get yourselves some netting or filter sponge and stop the debris getting into the bulkhead in the first place.........then it's just yearly checks from then on.
Every 3 months I pour a bucket of water over the driver's side windscreen area and watch it drain from 4 places underneath ! Or 3 places for later cars with only 3 drains
(rear of both arch liners and right and left sides of the rear edge of the undertray)

Delux solution
Why worry every week when you can fit and forget one of these.:smilie_re:
http://www.the75andztclub.co.uk/foru...ad.php?t=68328

http://lh4.ggpht.com/_CloltyGrcac/TI...0/P1040656.JPG

http://lh4.ggpht.com/_CloltyGrcac/TI...4/P1040613.JPG