wet behind seats

[sean_goodman]

wet carpet behind passenger seat, been standing in the rain. any ideas?

cheers
sean

[joust]

You have a leak

Likely suspect is rear window, they can sometimes allow rain in.

J

[sean_goodman]

joust said:

You have a leak

Likely suspect is rear window, they can sometimes allow rain in.

J

the leak bit i had worked out all those years studying to be an engineer paid off there lol.

cheers for the window tip, when it stops issing down i will go have a look. the carfets at the front are dry so it must be coming down from above/behind as the car hasnt been driven for a few days

[FUNKSTER UK]

I get the same but the window has been resealed in my car and I have been in there when the wet stuff is coming down with no leaks around the window. Would be interested to know your findings.

[obes]

only had this once....
different problem though, as mine were wet with petrol !

[sean_goodman]

obes said:

only had this once....
different problem though, as mine were wet with petrol !

mine tastes more like water lol

[sean_goodman]

braved the weather and been for a look. only place thats wet is direct behind passenger seat, the vertical face aka rear firewall is dry as is the parcel shelf. the rubber strip on the glass is not the tightest if fits, i can full it out with my fingers! i am not sure if this is meant to be a seal though i think it is just a dress piece with the glass being sealed by silicon.

think i will do a trip to get it removed and refitted with new sealant and see what happens

[ajg31]

Welcome to the leaky canoe club, lol. Pretty common. Could be rear seal on window, door window seals or cracked sealant on windscreen (yes it can travel behind the seats from that far forward ). good luck tracking it down. Spent a fortune trying to sort mine. Its pretty good now.

[Mr Noble]

Maybe a passenger was more nervous than you thought matey!!

[RobP]

Sean - likely culprit is the undertray. Because of the different metals (undertray, chassis, rivets) you get an electrolytic reaction once a bit of salt and water gets thrown into the mix. As 'residue' builds up this has the effect of forcing a gap in the undertray allowing ingress of water. It some bad cases it can actually pop the rivets. Unfortunately it's not a simple case of bunging a bit of silicone sealant over the offending piece (I've tried). It a seat and carpet out job sealing from the inside as well as taking off undertray, cleaning and re-fitting (with much larger headed rivets). Jacking the car up for any length of time from the side (even using the exact jacking points) can exacerbate the problem by 'flexing' the chassis around the cabin area causing leaks to occur. Once you get the leaks fixed I'd advise jacking from the very front (underneath front towing eye) and rear (under chassis where rear diffuser meets undertray).

[sean_goodman]

RobP said:

Sean - likely culprit is the undertray. Because of the different metals (undertray, chassis, rivets) you get an electrolytic reaction once a bit of salt and water gets thrown into the mix. As 'residue' builds up this has the effect of forcing a gap in the undertray allowing ingress of water. It some bad cases it can actually pop the rivets. Unfortunately it's not a simple case of bunging a bit of silicone sealant over the offending piece (I've tried). It a seat and carpet out job sealing from the inside as well as taking off undertray, cleaning and re-fitting (with much larger headed rivets). Jacking the car up for any length of time from the side (even using the exact jacking points) can exacerbate the problem by 'flexing' the chassis around the cabin area causing leaks to occur. Once you get the leaks fixed I'd advise jacking from the very front (underneath front towing eye) and rear (under chassis where rear diffuser meets undertray).

i could undestand this but the car has been standing so surely the water must have come from above

[F.C.]

sean_goodman said:

RobP said:

Sean - likely culprit is the undertray. Because of the different metals (undertray, chassis, rivets) you get an electrolytic reaction once a bit of salt and water gets thrown into the mix. As 'residue' builds up this has the effect of forcing a gap in the undertray allowing ingress of water. It some bad cases it can actually pop the rivets. Unfortunately it's not a simple case of bunging a bit of silicone sealant over the offending piece (I've tried). It a seat and carpet out job sealing from the inside as well as taking off undertray, cleaning and re-fitting (with much larger headed rivets). Jacking the car up for any length of time from the side (even using the exact jacking points) can exacerbate the problem by 'flexing' the chassis around the cabin area causing leaks to occur. Once you get the leaks fixed I'd advise jacking from the very front (underneath front towing eye) and rear (under chassis where rear diffuser meets undertray).

i could undestand this but the car has been standing so surely the water must have come from above

I had the same problem and it turned out to be the passenger side door window letting in water.
I thought the window looked fine but the garage said it had dropped a little they adjusted it to lift just a tad higher and now no more water!
F.C.

[sean_goodman]

i will wait for it it dry up a bit, the weather that is, and go out with the hose pipe and see what i can see

[AMG Merc]

Had same problem - failed rear window seal behind driver - free reseal job from my insurers glass co.

[RobP]

sean_goodman said:

RobP said:

Sean - likely culprit is the undertray. Because of the different metals (undertray, chassis, rivets) you get an electrolytic reaction once a bit of salt and water gets thrown into the mix. As 'residue' builds up this has the effect of forcing a gap in the undertray allowing ingress of water. It some bad cases it can actually pop the rivets. Unfortunately it's not a simple case of bunging a bit of silicone sealant over the offending piece (I've tried). It a seat and carpet out job sealing from the inside as well as taking off undertray, cleaning and re-fitting (with much larger headed rivets). Jacking the car up for any length of time from the side (even using the exact jacking points) can exacerbate the problem by 'flexing' the chassis around the cabin area causing leaks to occur. Once you get the leaks fixed I'd advise jacking from the very front (underneath front towing eye) and rear (under chassis where rear diffuser meets undertray).

i could undestand this but the car has been standing so surely the water must have come from above

This is why seats ans carpets have to come out and it needs to be sealed from within. The water from above collects and then seeps into the cabin. Try the other easier options first (rear window, passenger door etc) and if these are all OK and not letting water in, then I'm afraid it's the long messy (and expensive, if you get someone else to do it) job.

[saucyboy]

I had this when I first got mine and it was the floor. A few of the rivets had gone and the tray was moving enough for water to get in.

Oh, and the day I found this out was on the Noble run last November, which has been nick named 'The Monsoon challenge'.

James

[peterguk]

Mine suffers water ingress through the floor during journeys in heavy rain. Definitly not window seals.

[saucyboy]

All I did was replace the rivets. Just before I did, I placed some sealant in the gap first. Worked a treat as it has never leaked since.

James

[mikes_3r]

Simple... drive without a passenger.

[sean_goodman]

had a closer look, the rear window, ie on the bulkhead is not sealed as when i push on the glass i can see it moving away from the silicon.

ok, so lets say water is leaking in here in the rain, what i cant understand is how it would run down onto the floor? first it would have to run down the bulkhead until it reached the parcel shelf then run uphill over the parcel shelf so it could run down the bulkhead to the floor.

am i missing soemthing stupid? its just i cant understand how it could possibly flow from this window to the floor