The Stovebolt Site Forums The Shop Area General Truck Talk Frustrating Cowl Vent

I have had the same leak problem. It has turned out to be actually two problems. One is the seal. The adjustment has cured that problem. I took the glovebox out to give me access without lying under the dash and used a quarter-drive ratchet, a long extension and a 3/8" socket. I was able to get enough squeeze on the new seal.

The other problem was that the drain hose that comes out the bottom was leaking between the rubber the metal where it joins the drain. The leak would soak my right pant leg and my right shoe. This leak was because of rust on the metal. It's in a nearly impossible place to do anything about the rust so I smeared a little RTV silicone sealer on the inside of the hose and slipped it on -- not without some effort though. Hopefully the RTV will keep water from further rusting the metal of the drain. I have since quit driving it in winter because our state has started using calcium chloride as a de-icer but in Western Washington it rains in summer too. Now on to getting the windshield to not leak.