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[star_whites]

No idea where the water is coming from but I've found that both my rear footwell carpets are wet and I have mild under the mat. Any ideas where this will be coming in at all??

[05omegav6]

Scuttle drains would be a start

[Clock]

Check the drain hole inside the scuttle.
http://www.omegaowners.com/forum/index.php?topic=90582.0

[Nick W]

A scuttle leak would make the front footwells wet too?


As it's the rears that are wet, I'd be looking at damaged door seals, rusty wheel arches or dislodged bungs in the floor.

[terry paget]

I would expert blocked scuttle drain to flood the front carpets first. I have a car with rear left hand carpets wet, have yet to trace source, its not door drain holes, now suspect door seal.

[05omegav6]

A scuttle leak would make the front footwells wet too?


As it's the rears that are wet, I'd be looking at damaged door seals, rusty wheel arches or dislodged bungs in the floor.

Depending on how the car is parked, it could drain down the rear ducts first as they exit the heater box lower down

[terry paget]

Interesting. I have poked my scuttle drain through, so it ain't blocked now. There is little sign of more water appearing so far. I am drying my carpets out by extensive mopping up, then laying newspapers under them and changing them every few days.

[star_whites]

The fronts are definately dry and I park it on a completely flat surface and home and at work.i just find it strange that it's both rear carpets. Does the sunroof have a drain and if so where does it drain too??

[Andy B]

... Does the sunroof have a drain and if so where does it drain too??

Yes, they exit through the boot floor by the spare wheel & first aid compartment on a saloon ...... they must be similar on an estate ...... they're black plastic tubes maybe 5/8" dia (16mm Mark  )

[johnnydog]

Interesting. I have poked my scuttle drain through, so it ain't blocked now. There is little sign of more water appearing so far. I am drying my carpets out by extensive mopping up, then laying newspapers under them and changing them every few days.

I know the OP has rear carpets that are wet, but if the fronts are excessively wet too, can the water travel from the front to the rear if parked on a slope?
When this happened on several of my Omegas, because the scuttle drain had become blocked, only the front carpets were wet on mine, but having first cleared all the crap and silt from the scuttle drain, I attempted to dry the carpets with a vax, which removed some of the water but the problem is that all the thick foam under the carpet which has the wiring tracks in it will be absolutely saturated, because the water enters the cabin from the heater access, and runs down under the carpet directly into the foam rather on the top. That is why the first you know about it is a damp spot on the carpet, or the screen and side windows misting up excessively but it will be a lake in reality and no amount of mopping with a towel on top of the carpet will dry it properly. I lifted the carpet on mine to get to the foam underneath, undid the nuts securing the wire track so it can be lifted up as high as possible with the foam, and wedged it with a block of wood, so that I could slide my hand and an absorbent cloth under the foam, and then squeezed the foam from the top so that the cloth soaked up as much water as possible - which is a lot! And I kept at it for quite a while. You leave it for a brew, and it then seems as wet as it was initially! When it eventually seemed damp rather than wet, I got an old hairdryer (NOT a hot air gun!!!), set it on the very lowest setting, and then propped at the best angle to dry the foam. Don't set it too hot or you'll melt the foam! I let it run for 2- 3 hr periods at a time blowing luke warm, with the windows open as well, and after several days (!!!yes, days!!!) it drys out eventually. If it isn't properly dry, when you next use the car, it will mist up for fun, until the carpets are completely dry. Incidentally, I clear the scuttle now at every service......

[Sir Tigger KC]

If you have one or can borrow one put a dehumidifier in there with the windows closed and that will suck out the damp. 

[robson]

I clean mine every 2 weeks

[Diamond Black Geezer]

Thanks to a combination of blocked scuttle drains, blocked drainage pipes, a cracked windscreen, a rusted windscreen frame and a leaking sunroof (yes, all of the above!) causing water ingress, I found after a heavy downpour the carpets to be wet. ('no Sh!t, Sherlock, as they say) Aside from obvious mopping, I found my car's own heating ducts worked incredibly well for drying her out. If I got a couple of good days of no rain, making sure the blowers were on high, at max temp, with the vents aimed at the feet, and on non-recirculate mode (to get the damp air out, of course) just as I was driving about got the carpets dry pretty effectively. 

[05omegav6]

You need to remove the carpets from the car to dry them properly. The rear sound deadening foam is integral to the carpet, so any moisture still present will be trapped against the floorpan regardless of how much mopping up you try.

Similarly, the underlay im the front is a plasticised foam which goes brittle over time, allowing water    to soak in. This might also be the first sign you get of a heater matrix leak, especially in the drivers footwell as a puddle won't manifest itself on the carpet until it's too late... That foam will hold gallons of liquid before it shows as anything more than a damp patch.

[baggers]

Check the inner wheel arch behind the wheel near where the suspension arm passes, this a common area of corrosion along the seam and will let plenty of water in to the rear footwell.  If you lift the rear seat up you can see the seam and check for corrosion there too.