Rear drains from sunroof.

kaiser · 16th October 2011, 13:31

dr1.jpg
The battlefield! Rear seat out, platic wheel arch off, rear side trim off

dr0.jpg
The culprit, water under the rear seat! not to speak about the rear foot well!

dr2.jpg
The pipe from the left rear drain off the sunroof, seen slightly above the middle of the picture, coming down the pillar behind the rear door.

dr3.jpg
The pipe disconnected from drain pipe which is hidden behind the bracket for the audio equipment

dr4.jpg
The drain behind the rear wheel arch, seen from below the car. I suggest you cut the rubber end off, to improve drainage.

I can see a black soft 12mm? pipe running down the "C" pillar behind the rear door, if I remove the corner rear seat part. It seems to continue over the first part of the wheel arch.
I suspected it terminated in the rear wheel arch, but it does not.
It terminates after the inner wheel arch at the back. There is a small triangular space where a rubber flap, similar to the ones off the front plenum exits.
Small amount of water was found. Not enough to explain the rear seat.
Trim coming off.
The pipe follows the wheelarch, and terminates at the back of the arch into the rubber plenum type discharge flapvalve. The long pipe from the rear of the sunroof is just pressed into the larger rubber discharge pipe.
When the rubber discharge gets clogged up, water will dam up in the larger pipe until the pressure becomes big enough to leak at the connecting point. Water will then discharge unto the floor at the car, in the rear, run along the wheelarch, into the section under the rear seat, and from here into the rear passenger footwell, from where there is no escape.

Solution is to clean the rubber discharge pipe, sitting at the back of the wheelarch, accessible after removing the wheelarch plastic liner. Be careful with using compressed air, if the connection splits open, the side trim will have to be removed. If the trim is removed, seal all the nuts for the chrome side trim stripe.
Addendum: the rubber discharge pipe can in fact be accessed without removing the whole plastic lining. Just remove the screw holding the little triangular extension under the car after the wheel arch, and the discharge valve i behind that little flap.! Very easy

I suggest the moderator makes an advisory regarding these rear drains from the sun-roof, as I don't think this is commonly known!

Longbridge Loony · 22nd February 2012, 06:42

Thanks for that post. Wasn't aware that was on here. However the water appears to be coming from the front of the car and not the rear. I have had the seats out to check the presence of the orange clip-and the rear of the car and under seats are bone dry.

cotton · 14th August 2012, 16:34

Hi all,
I know this may sound stupid, but where are the drains in the rear of the sunroof & can they be rodded clear, and if so what can I use? I have checked the pipes in the boot and they are OK , but wanted to know if I can clean them out from sunroof end.
I am finding out a lot from the forum,but know there is soooooooooo much
more.
Don't know how to put mods done so far on bottom of this post, but will fathem it out
Cheers
John

peter1961 · 16th October 2012, 13:26

if you cut the pipes at an angle they are less likely to block, this particulary applies to the plenum drains.

AWD/Alba · 18th October 2016, 19:34

Hi.
I'm new to Rover ownership and to this club and forum so thanks for letting me join��.
Been looking at this thread as I have a flooded near side rear footwell and a wettish near side front footwell. Following the previous advice I located the tube connection at the bulkhead, pulled it apart and cleaned the tube. Using a syringe I flushed out the lower tube which ran freely. Then I flushed out the tube from the sunroof which drained into a small tub. That was also ok. BUT, during the latter process I noticed water dripping from below the trim of the "A" pillar at the bottom of the door. On removing the top of this trim I followed the tube to a metal spring clip holding the tube in place. Under the clip the tube had a couple of turns of the white Rover tape. Above the clip was dry, below was wet! Removing the tube from the clip and the tape from the tube revealed no splits or holes. I used silicone tape instead of the original Rover "stuff" and taped about two inches of the tube, discarded the the clip and flushed through several times and all seems fine. Finally taped the topped tube using silicone tape. Unable to get the correct size of pipe connector I shoved the pipe from whence it came, put kitchen roll at the bottom of the trim (below the glovebox). It is now raining so next job is to check if the paper is wet!

16th October 2011, 13:31	#1
kaiser This is my second home 75 Tourer 2.5 Auto, 1.8T, 75V8ZT Join Date: Jun 2007 Location: Johannesburg ZA Posts: 6,200 Thanks: 1 Thanked 859 Times in 613 Posts	Rear drains from sunroof. dr1.jpg The battlefield! Rear seat out, platic wheel arch off, rear side trim off dr0.jpg The culprit, water under the rear seat! not to speak about the rear foot well! dr2.jpg The pipe from the left rear drain off the sunroof, seen slightly above the middle of the picture, coming down the pillar behind the rear door. dr3.jpg The pipe disconnected from drain pipe which is hidden behind the bracket for the audio equipment dr4.jpg The drain behind the rear wheel arch, seen from below the car. I suggest you cut the rubber end off, to improve drainage. I can see a black soft 12mm? pipe running down the "C" pillar behind the rear door, if I remove the corner rear seat part. It seems to continue over the first part of the wheel arch. I suspected it terminated in the rear wheel arch, but it does not. It terminates after the inner wheel arch at the back. There is a small triangular space where a rubber flap, similar to the ones off the front plenum exits. Small amount of water was found. Not enough to explain the rear seat. Trim coming off. The pipe follows the wheelarch, and terminates at the back of the arch into the rubber plenum type discharge flapvalve. The long pipe from the rear of the sunroof is just pressed into the larger rubber discharge pipe. When the rubber discharge gets clogged up, water will dam up in the larger pipe until the pressure becomes big enough to leak at the connecting point. Water will then discharge unto the floor at the car, in the rear, run along the wheelarch, into the section under the rear seat, and from here into the rear passenger footwell, from where there is no escape. Solution is to clean the rubber discharge pipe, sitting at the back of the wheelarch, accessible after removing the wheelarch plastic liner. Be careful with using compressed air, if the connection splits open, the side trim will have to be removed. If the trim is removed, seal all the nuts for the chrome side trim stripe. Addendum: the rubber discharge pipe can in fact be accessed without removing the whole plastic lining. Just remove the screw holding the little triangular extension under the car after the wheel arch, and the discharge valve i behind that little flap.! Very easy I suggest the moderator makes an advisory regarding these rear drains from the sun-roof, as I don't think this is commonly known! Last edited by kaiser; 8th January 2012 at 16:49.. Reason: don't need to remove the whole plastic wheel arch protector

22nd February 2012, 06:42	#2
Longbridge Loony Loves to post MG6 GT SE & Rover 25 IE Join Date: Mar 2007 Location: Staffordshire Posts: 409 Thanks: 112 Thanked 23 Times in 14 Posts	Thanks for that post. Wasn't aware that was on here. However the water appears to be coming from the front of the car and not the rear. I have had the seats out to check the presence of the orange clip-and the rear of the car and under seats are bone dry. __________________ [SIGPIC][/SIGPIC]Above all it's a Rover

14th August 2012, 16:34	#3
cotton Regular poster rover 75 saloon Join Date: Apr 2012 Location: st issey Posts: 52 Thanks: 50 Thanked 3 Times in 3 Posts	Rear drains on sunroof Hi all, I know this may sound stupid, but where are the drains in the rear of the sunroof & can they be rodded clear, and if so what can I use? I have checked the pipes in the boot and they are OK , but wanted to know if I can clean them out from sunroof end. I am finding out a lot from the forum,but know there is soooooooooo much more. Don't know how to put mods done so far on bottom of this post, but will fathem it out Cheers John

18th October 2016, 19:34	#5
AWD/Alba Newbie Rover 75 Saloon Join Date: Sep 2016 Location: Berriedale Posts: 3 Thanks: 0 Thanked 1 Time in 1 Post	Sunroof drain tubes. Hi. I'm new to Rover ownership and to this club and forum so thanks for letting me join��. Been looking at this thread as I have a flooded near side rear footwell and a wettish near side front footwell. Following the previous advice I located the tube connection at the bulkhead, pulled it apart and cleaned the tube. Using a syringe I flushed out the lower tube which ran freely. Then I flushed out the tube from the sunroof which drained into a small tub. That was also ok. BUT, during the latter process I noticed water dripping from below the trim of the "A" pillar at the bottom of the door. On removing the top of this trim I followed the tube to a metal spring clip holding the tube in place. Under the clip the tube had a couple of turns of the white Rover tape. Above the clip was dry, below was wet! Removing the tube from the clip and the tape from the tube revealed no splits or holes. I used silicone tape instead of the original Rover "stuff" and taped about two inches of the tube, discarded the the clip and flushed through several times and all seems fine. Finally taped the topped tube using silicone tape. Unable to get the correct size of pipe connector I shoved the pipe from whence it came, put kitchen roll at the bottom of the trim (below the glovebox). It is now raining so next job is to check if the paper is wet! Last edited by AWD/Alba; 18th October 2016 at 19:36.. Reason: Line repeated.

16th October 2012, 13:26	#4
peter1961 Gets stuck in 99/V connie cdt moonstone green saloon. 94/L 214 cabriolet dark blue Join Date: Dec 2007 Location: nelson lancashire Posts: 809 Thanks: 3 Thanked 12 Times in 11 Posts	if you cut the pipes at an angle they are less likely to block, this particulary applies to the plenum drains.