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On any vehicle, when you have water on the front floor, what looks like is coming down the "A" pillar, check your wind screen or have a glass company check it. Your car is in its 20's after all.
Then I'd check the door seal and this is quite simple. Take a currency note and put it in the area the seal will be and close the door, leaving a portion out to grab hold of. You pull up on it ..and if you have good retention, the seal is probably good there....but if it pulls out, that's probably your issue. You do this all the way around the the top half of the door where its possible to do. Even if you don't find a problem, a good thing to do is to use a lite duty lube spray like WD 40 (don't know if you have that in Oslo?) and rub it on the seal all the way around the door. It will help keep the seal pliable for more years of service. Not only do the doors, but the the boot and bonnet seals.
Now, do you have a sunroof? If so, there are supposed to be drains in the "A" pillars that plug up. I don't have one to be specific, but there's some older threads on it you'll have to try to find unless someone else chimes in.
On any vehicle, when you have water on the front floor, what looks like is coming down the "A" pillar, check your wind screen or have a glass company check it. Your car is in its 20's after all.
Then I'd check the door seal and this is quite simple. Take a currency note and put it in the area the seal will be and close the door, leaving a portion out to grab hold of. You pull up on it ..and if you have good retention, the seal is probably good there....but if it pulls out, that's probably your issue. You do this all the way around the the top half of the door where its possible to do. Even if you don't find a problem, a good thing to do is to use a lite duty lube spray like WD 40 (don't know if you have that in Oslo?) and rub it on the seal all the way around the door. It will help keep the seal pliable for more years of service. Not only do the doors, but the the boot and bonnet seals.
Now, do you have a sunroof? If so, there are supposed to be drains in the "A" pillars that plug up. I don't have one to be specific, but there's some older threads on it you'll have to try to find unless someone else chimes in.
Okey. Yes i have a sun roof. Maybe the draining pipe is clogged?
Had a similar issue; leak was coming from the cowl to firewall body seam. Filling the junction with POR15 seemed to resolve the issue. As the others said, sunroof drains are a good first place to check. To trouble shoot, pulled the seat and carpet sprayed the car with a garden hose until the water stream was visible.