I think this is a good idea for general use but may get clogged very quickly if you’re doing big days/weeks on corrugated, dust & dirt roads. I was shocked how much dust is drawn into the corners, I think the corrugations force the flappers open more than they should. 🤷♂️
Replacing Rear Air Vent Flap
- Thread starter Calico Van
- Start date
Circling back, here...I did the delete of these silly flappers and applied a nice patch of Gorilla tape. There was a lot of dust up in there, for sure. So far I can report significant improvement in terms of dust and diesel fume infiltration, with no adverse effects on door closure or my eardrums. This mod was a winner. Thanks to all for the tips!
Rocksnsalt
There Can Be Only ONE
If I ever get to it, I’m going to try securing foam filters in those areas.
Eric B
Well-known member
Not sure covering the rear flaps up completely is a good idea in the long run ... there's a reason they are there in all cars ...
Excerpt from the 1965 Chrysler patent:
Perhaps most importantly, it reduces the back pressure against which the heater blower has to work, thereby appreciably improving heater performance and efficiency. Also, in vehicles of the hardtop type, it precludes the understrained upper edges of the windows from being pushed outwardly away from their seating surfaces by excess interior pressure, thereby precluding the noise and promiscuous air flow that would attend such outward movement of the window upper edges. The selective outflow of exhauster air also has the effect of continuously purging the passenger compartment of smoky or otherwise contaminated air.
If you really want to do something:
Fill the void with an open cell foam (something as coarse as the foam inserts to keep leaves out of rain gutters for example),
or adapt a paper / HVAC pleated filter with a custom 3d printed frame adapter - that might be a thing ...
you do you
Excerpt from the 1965 Chrysler patent:
Perhaps most importantly, it reduces the back pressure against which the heater blower has to work, thereby appreciably improving heater performance and efficiency. Also, in vehicles of the hardtop type, it precludes the understrained upper edges of the windows from being pushed outwardly away from their seating surfaces by excess interior pressure, thereby precluding the noise and promiscuous air flow that would attend such outward movement of the window upper edges. The selective outflow of exhauster air also has the effect of continuously purging the passenger compartment of smoky or otherwise contaminated air.
If you really want to do something:
Fill the void with an open cell foam (something as coarse as the foam inserts to keep leaves out of rain gutters for example),
or adapt a paper / HVAC pleated filter with a custom 3d printed frame adapter - that might be a thing ...
you do you
Last edited:
Rocksnsalt
There Can Be Only ONE
I agree with the above. I’d rather filter it, not block it. The openings are there for a reason.
But yeah to each their own.
But yeah to each their own.