The common is a very very common problem on 90-93 Integras. The issue is that after 17yrs the seals are no longer in good enough shape to keep the water out and it ends up on your floor. This is after it goes through your blower motor and rusts it out.
Before even starting, go to a Honda or Acura dealership and order 8 of the follow part number, 91608-SJ6-003. They are super cheap ($2.50 each, a buck something at cost).
To do this you’ll need basic hand tools, 14mm socket, flat head and #2 phillips screw drivers, panel poppers and needle nose pillars. You will also need a pair of scissors.
I didn’t take pictures of removing the wiper cowl but I will describe it the best I can.
Step 1: First use the 14mm socket to remove the wiper arms.
Step 2:Then use the flat head to pop up the little black circle covers and unscrew the clips around the white pegs. You have to unscrew them by hand, you can use the flat head but you may break one so be careful.
Step 3: Now pull the plastic push pins from the cowl seal (they are under the seal). Use the needle nose pillars to squeeze the bottom and the panel popper to pop them out. Now you can remove the seal.
Step 4: Remove the wiper cowl, be very very careful to not break the cowl. Especially were it goes around the hood hinges.
Step 5: You will now see the cabin intake cowl, there are 8 plastic trim screws on the top and 2 on the side. Use the Phillips screw driver to remove them. They can be a bit of a bitch. The panel popped helps to get them out.
Step 6: Now you can see the problem, the 8 black trim screw along the top have those seals you order. After 17yrs they are shot! So it’s time to replace them. Pull them out by hand.
Look how old and worn these things are.
Step 7: Pop the new seals in.
Step 8: Re-assemble? No no yet. Look at the cabin intake cowl, look at the bottom. I bet yours will look similar to mine.
How am I going to fix this? one might think. Fear not, it’s a simple fix. Go to any hardware store and buy foam tape (commonly used for sealing windows but also works in making a seal here. The stock seal is just foam too. Also, they make GREAT tail light seals and are much cheaper then the $20 per from the dealer).
Step 9: Pull the old seal off and wash all the dirt and grim off the cowl. Now pull the backing off the foam tape and put it on just like the old factory seal.
No need to cut the foam tape either, it does corners like a champ.
Step 10: Assembly is the reverse of removal. Stand back and be happy that your windshield cowl will no longer leak.
Hope this helps some people!!