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[robson]

Would a water leak at the. bottom corner passenger side of the windscreen end up inside the cockpit.The rubber  seal here is not good and I dont think the water is coming from the pollen filter housing drain. :'(

[Doctor Gollum]

Possibly the sunroof drain.

The rubber trim around the screen is purely decorative* as the screen is glued in all the way around and should be 100% weather tight.

The frame the rubber clips into is shaped up the sides to keep rain water off the side windows at speed.

The rubber at the bottom of the screen helps divert water into the scuttle drains but is largely irrelevant. Incidentally, this clips into the bottom edge of the frame that clips all the way around the screen.

[grifter]

The drain at the bottom of the cabin filter was blocked in mine, it caused water to back up in that box section and flood into the passenger floor.

[robson]

Thanks Doc I do not have a sunroof I thought that the screen was bonded but if the bond at that bottom corner was failing would the water come into the scuttle drain or the inside of the car.

[Doctor Gollum]

Whilst hypothetically possible, it's extremely unlikely.

If you remove the glove box, passenger air vent assembly and passenger airbag, then you should have a pretty decent view of the area to see where the rust is that's allowing water in as that's the most likely cause given the lack of sunroof.

[Doctor Gollum]

As a precursor to the above, is there water (or evidence of) in the footwell air vent?

If yes, then your heater intake drain is blocked.

[robson]

Thanks Doc I will have a look.

[TheBoy]

I would say unlikely to be windscreen, unless incredibly badly fitted.

As others have said, far more likely to be a blocked scuttle drain....

...and given its age, even far, far, far more likely to be corrosion in the scuttle drain, which makes up a blanking plate for the baulkhead.  Remove the upper footwell trim, peel back the carpet, and inspect the blanking plate in the baulkhead from the footwell.  If you can get an assistant to pour a jug of water unto scuttle drain, and leaks will be blindingly obvious.

[robson]

Hello doc cant find any water in air vent but will have to strip out footwell for a good look

[iansoutham]

Check this thread out.

https://www.omegaowners.com/forum/index.php?topic=147555.0

[addy]

Don't know if this will help. It is of my 1995 Omega but may be the later models are the same? I removed the pollen filter housing from the scuttle, to fix a hole in the bottom of the scuttle around the drain hole. This gave access to the panel seams. Also as can be seen in the photos, there was loads of dirt, that was hidden by the housing. The rust was just surface. Cleaned area up. Seam sealed and repainted. The housing is held by nuts, inside the car that can be undone as normal flange type. But you have to do the upside down position, even with the glove box out. I ran a bead of sealant around the housing, before refitting it. The seal on it is like a kind of foam.

[TheBoy]

The area in the bottom of the last pic, below the fan aperture,  is a common area where it rusts through

[Field Marshal Dr. Opti]

I would say unlikely to be windscreen, unless incredibly badly fitted.

As others have said, far more likely to be a blocked scuttle drain....

...and given its age, even far, far, far more likely to be corrosion in the scuttle drain, which makes up a blanking plate for the baulkhead.  Remove the upper footwell trim, peel back the carpet, and inspect the blanking plate in the baulkhead from the footwell.  If you can get an assistant to pour a jug of water unto scuttle drain, and leaks will be blindingly obvious.

Yep...I had this. Completely blocked with leaves, twigs, and assorted crap.

[robson]

Has anybody tried sealing the seams at the base or the scuttle water drain from the inside,Mastic roof sealer etc. That from inside the pollen filter side not inside the car.

[robson]

Sorry  bad type "that Is"