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No worries just lmk my car is stuck on cold anyway and I don’t drive it in the winter
but again much appreciated I hope to see you after a couple of months
Ha Flying into Miami next month to go scuba diving in Key Largo! THen up to Deland for Skydiving! I doubt my gal will put up with me working on a car though!
Ill lend her the jet skis for the day! Enjoy your trip!
In this case the "stealership" is quoting the price to pull the dash apart and, probably, replace the heater box assembly completely. Looked at in that light it is a wee bit less usurious.
Thank you AMCPILOTAMCPILOT! I just finished this project but would not have attempted it without your fine tutorial.
A few things
1 - Allow plenty of time. A person with experience may be able to complete the project in just a couple of hours but it seems wildly optimistic to think a first timer could be that quick. My project was complicated by also covering the inner vent door (following this tutorial Repairing the inner vent door black foam issue - Rennlist - Porsche Discussion Forums) and I readily admit that I may be slow but even so it took me -far- longer to complete.
2 - Loosening the coolant fill cap in the rear trunk releases any remaining pressure in in the cooling system and so can minimize the amount of coolant lost when the hoses are disconnected from the heater core. Wine corks are just the right size to plug the disconnected hoses.
3 - Another alternative material for covering the blend doors are craft store self-adhesive EVA foam sheets. Although I make no claim that this is the "best" choice I like the idea of covering the doors with fewer, larger, pieces of material instead of using a bunch of narrow strips. EVA foam sheets cut to size Applied to outer blend door
I chose to use HVAC foil tape.20x more durable than foam.
Why use foam? Little bit of residual airflow throughput? I poked a few holes in the tape to allow for that.
My heat works great.
And once again thank you all for posting all this info that I couldnt have fixed it without!
I chose to use HVAC foil tape.20x more durable than foam.
Why use foam? Little bit of residual airflow throughput? I poked a few holes in the tape to allow for that.
My heat works great.
Because that’s what the engineers who designed it did.
And once again thank you all for posting all this info that I couldnt have fixed it without!
Because that’s what the engineers who designed it did.
I typically love German engineering, but in this case I wish they would have used foil at the factory. Would have saved me some grief, $, and a Saturday sitting in my frunk. Ha.
Oh, and the garage yoga gymnastics fitting my large frame into the pass foot well. AAAArrrrggghh!
HVAC tape certainly is more durable than foam but it was an option that Porsche decided not to use when they built the car so I tried to see if I could determine why. While working on this project I came to the conclusion that covering on the blend doors serves three purposes. The first is (well doh) to cover the holes in the doors. Any type on tape or foam or plugs could do this equally well. The second function is vibration dampening. It seems that air blowing across a piece of sheet metal has the potential to cause an anoying vibration. I don't know if this actually occurs in the real world but foam would be better able to damp such a vibration than tape. The third function is less obvious but probably more significant. When I removed the outer blend door and examined it, I noticed that the original foam covering extended about an eighth of an inch beyond the edges of the door. My guess is that that is meant to form a seal around the door's edges. The EVA foam I used came in 12" x12" sheets and that made it easy to cut out pieces that both covered holes in the doors and duplicated the seal around it's outside edge. Don't think I could have done that with tape. Another material that may be more durable and still seal around the edges and dampen vibration would be self-adhesive felt sheets. Didn't think of that one till I had my car put back together... Oh, and I don't buy into the "they used foam so a little air can pass" theory because the original foam on my blend doors appeared to have a coating to make it airtight.
Finished mine last Sunday - was able to get to both doors; the hot/cold door came out exactly per the instructions, and I have the bruises on my wrists to prove I was able to reach the level door in the box to replace the foam (in place) as well.
Hi, It depends on which door the foam is comng from. However it is more than likely some is coming from the hot cold mixer flap which means the air can flow through the heater core which is always on. So, yes, your heater will always be on. Your a/c when running, will be fighting against the heater and probably not winning.
It is a job you can do yourself, sepecially if your car is LHD since you won't have to remove the AC pipe like us RHD owners do. Here is a link to a post I did when I completed mine earlier this year. Some of the photos come from trailblaizers before me. I just added to them, made RHD versions and added instructions for the inner vent door fix since they are both probably in bad need of repair and you may as well do both at the same time:
02-16-2022, 06:14 PM
