I've had a few water leaks with my prelude lately.
I fixed a water leak in the trunk by resealing the tail lights from information from this forum.

I now have a problem with the doors. I have MDF speaker rings in the front doors to mount my speakers (big magnets) and water has been leaking in the doors somehow and it has made the MDF swell up. Has any one else had issues with water in the doors?

How do I prevent water leaking into my doors?

 

If the water is on the outside of the inner door skin(where the window is). You can only replace the rubber strip that rubs the window on the outside, and still I don't think you can get all of the water stopped.

If you still have those speaker shields that cover the inside of the OEM speaker you should put those on.

 

yeah the strip is probably lettinga lot of water in. you can use the oem speaker holder to cover some of it up, but make a baffle out of foam or something to attach to the door and seal any water from the speaker or the mdf rings.

 

Yeah I have plastic between the door/mdf that runs down behind the speaker - didnt help at all.

I'm not sure how water is getting to the mdf rings.