My Experience with 2004 Durango Wiper Cowl Leakage
I just wanted to pass on my experience with this issue and say thanks to previous posters who provided info relating to the problem.
Last week my Durango (5.7L Hemi) stalled out in a heavy downpour and the check engine light came on. A quick web search yielded information relating to water passing the wiper cowl and causing all sorts of havoc.
Looking at my cowl it was immediately apparent that the seal was buckled up off of the windshield and water was running right into the engine compartment.
I decided to caulk the cowl down but when I removed I could see a few things.
1) There are several plastic tabs along the windshield side edge of the cowl that snap into slots on the body. A few of these were broken and I am thinking this is the reason the cowl had buckled at the seal.In addition we had a very hot summer which may have also played a part.
2)The design of the cowl was poor and water running into the cowl would likely go right into the hole that the wiper arm connects through.
My local dealer happened to have the cowl in stock ($129), so I drove over to see if the redesign was really any better. I looked at it, decided it was better, the holes for the wiper arms have an elevated "collar" around them and the channel that the water runs into appears to be a bit deeper.
I decided to replace the cowl as well as apply a bead of silicone caulk along the cowl edge right behind the rubber seal that meets the windshield.
I was able to get the push pins called for in the other posts/TSBs at Autozone for $5 (pack of 15). The dealer wanted $4.60 each for these.
OK, sorry for the long winded post but just wanted to return the favor for the useful info other folks posted.