Yup, its the rubber gasket. After 30+ years they dry out and crack then no longer seal.

I've dealt with this with silicone sealant to try to keep the water out until the car gets painted. At which time it will be truly fixed by replacing the gasket when the car is stripped for paint.

The silicone has slowed the leaks, but thats about it.

I would urge you to lift up your carpet or rubber mats and have a look at the floorboards. This is the major issue with the leaky windshield; rotting sheet metal in the floorpans. This is a big deal that will eventually kill your Volvo so it needs to be attended to if you have a problem with rust. Also check the frame rails as water can leak down and rot these also.

Generally the old Volvo's were rustproofed adequately, but time does take its toll.

If you are in Vancouver, WA then you can easily hop across the river over to IPD for the gasket and Shayne or Cameron would be a great resource in dealing with replacing it.

Vclassics website has a very good article that details what is involved.

http://www.vclassics.com/archive/windprn.htm

Also Grassroots Motorsports has some info dealing with the consequences of a leaky windshield in their project car.

http://www.grassrootsmotorsports.com/volvo122s.html

Of course you can always pay someone to do the replacement, considering what a pain this job is not necessarily the worst idea in the world.

Good luck, keep it rolling.

-Mario E.
Lawrence, KS

It's the windsheild gasket. A quick fix would be to try and seal it with some silicone coulking. And even better (although complicated, expensive, PITA) fix would be to replace the gasket, although that might still result in a leak!