Foam pieces from A/C vents
07-08-2011, 10:08 AM
#1
Pro
Thread Starter
Foam pieces from A/C vents
The current "smelly air post" got me to wondering what I should do about foam chunks flying out of my air vents. The grey colored foam seems to be the stuff used to seal the air ducts to each other. I'm thinking it would be a PITA to pull the dash and replace all the foam.
Has anyone else experienced this?
Has anyone else experienced this?
07-08-2011, 07:32 PM
#4
Rennlist Member
Mine has been doing the same thing for a year or two. The foam is coming from an vent door inside the system. There is a DIY either here or on Renntech that shows you how to fix it. The dash does not have to come out, and it looks relatively easy.
It's on the list to do, but it's not really bothering me and the HVAC system still works as it should.
It's on the list to do, but it's not really bothering me and the HVAC system still works as it should.
07-09-2011, 12:13 AM
#5
Rennlist Member
Have the problem in the 968 - now 18 years old, but not in the C4. The good news is - unlike the Air Cooled years - these Porsches have such powerful A/C & heaters that a little lost sealing in the vent is not missed. Just need to vacuum more often.
07-09-2011, 02:36 AM
#6
Poseur
Rennlist Member
Rennlist Member
Sadly, as our cars get older and older (particularly in very high heat areas) the foam that helps to seal the various air ducts within the a/c and heating systems starts to break down. It's a royal pain in the rear to dig into those places to replace failing foam. The vacuum solution will at least clear out the existing loose pieces, but in time you will be unable to control your cabin temperature effectively as the ducts will let hot mix with the cold.
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07-09-2011, 03:36 PM
#8
Drifting
Sadly, as our cars get older and older (particularly in very high heat areas) the foam that helps to seal the various air ducts within the a/c and heating systems starts to break down. It's a royal pain in the rear to dig into those places to replace failing foam. The vacuum solution will at least clear out the existing loose pieces, but in time you will be unable to control your cabin temperature effectively as the ducts will let hot mix with the cold.
In my '95 LS400 I am able to "latch" the coolant valve to the heater core closed, gets me ~28MPG hwy rather than ~25MPG.
07-11-2011, 01:17 PM
#9
Three Wheelin'
The current "smelly air post" got me to wondering what I should do about foam chunks flying out of my air vents. The grey colored foam seems to be the stuff used to seal the air ducts to each other. I'm thinking it would be a PITA to pull the dash and replace all the foam.
Has anyone else experienced this?
Has anyone else experienced this?
You can easily remove the residual foam sheeting from the flapper door by removing the cabin filter and reaching down to the door and pulling off the remaining foam. Also you can stick a vacuum with a crevice tool on it to suck out any other foam that is in the blower motor cavity right below the door. Lastly, if you want, you can get a new piece of foam from any fabric store and replace the old foam that has disintegrated.
This repair is completely accessible from the outside cowl on the passenger side of the car. Just remove the plastic cover as you would to replace the cabin filter, pull out the filter, and reach in and pull out the old foam.
07-11-2011, 04:57 PM
#10
Pro
Thread Starter
The foam is coming from the air intake flapper door right behind the cabin air filter. This is pretty common on older cars that spend most of their time outdoors.
This repair is completely accessible from the outside cowl on the passenger side of the car. Just remove the plastic cover as you would to replace the cabin filter, pull out the filter, and reach in and pull out the old foam.
This repair is completely accessible from the outside cowl on the passenger side of the car. Just remove the plastic cover as you would to replace the cabin filter, pull out the filter, and reach in and pull out the old foam.
