2/22/20: Time to check another mod off the list.
Dust Mitigation - Have you noticed how much dustier the cabin of a Gen3 gets than other vehicles? It's really something that has jumped out at me and so today I knocked out mod 2 of 2 to try and solve this issue.
To review, the first thing I did is install a
Cabin Air Filter to stop the dust from coming in through the climate control vents.
Mod 2 is to address the dust that comes in from the rear of the vehicle. The Gen3 has cabin pressure equalization vents in the rear of the body. They are basically two flaps, made of thin rubber, that when you close a door or have the A/C or fan on they open up and allow air to escape from the inside of the body so that the pressure inside the cabin is not higher making it harder to open or close doors. The problem is that these vents let in a ton of dust when you're rolling down a dirt road with your A/C on because they will be open.
I followed this write up from 2012 (hint, hint, forum search is really useful):
https://www.expeditionportal.com/forum/threads/dusted-cabin.77863/
Just to add some of my own thoughts and pics:
I started with the Passenger side which is easier. Remove the tail light, remove the 2 10mm bumper bolts inside the tail light cavity, remove the 2 bumper plastic push clips nearest to the tail light (hidden by the rear door when closed), and remove the closest 12mm bolt holding the bumper on (removing these things lets you tug on the bumper and it moves/flexes out a little bit to make getting the vent out a little easier), pop out the vent, remove it from underneath the bumper, clean dust/dirt off vent, cut out filter material and tape it over the inside, reinstall.
The Driver side is basically the same but because of the resonator I couldn't get the vent out the bottom. So I removed the bumper reflector and slid it out through that opening instead.
View With Tail Light Removed (look at all the dust build up above and on the louvers):
The Vent:
View with the vent removed, maybe in the future I will explore simply jamming a ball of filter material into this hole instead of taking the time to tape on perfect squares on the vent. I wonder if they even make filtration material that is loose like cotton candy that you can just stuff in there?
Here are the filters I used, only $5. You only need 2 but you can always use the rest in your home's air registers or save them because you'll obvioulsy want to change them out eventually (I'll shoot for once a year).
I wanted to make sure they would stay in place so I splurged on the expensive tape and gave
Gorilla a try. It was good, but I wish it was just a little bit tackier (could have been because I was doing the job in near freezing temps). The game plan:
1/2 way there on the Passenger side vent:
All Done:
Be sure not to impede the vent's 4 side clips with tape:
For those of you without rear bumpers or custom bumpers, probably even more important to take care of this mod:
Final Thoughts - Once summer comes I'll be able to see if I notice any difference in the amount of dust in the cabin. I figured this mod was worth a shot since it was only like $12 (with plenty of filters and tape left over) and I found some good reviews on it on the Aussie forums and those dudes have real dust to deal with.
Some people taped the louvers shut altogether but there were mixed reviews after that point as to whether it had negative effects on closing doors, the climate circulation, etc. so I didn't want to risk it and figured this would be the safer option even though I'll have to do this again periodically as the filter becomes dirty/clogged.