Automotive AC Repair and Discussion topics.
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I just checked the heater hoses on both front and rear sides are cool to the touch and my heater is controlled by a vacuum valve that will let the engine coolant enter the heater core , this engine fan is rated to pull 10,000 cfm through . Iv replaced the headliner before it’s not to hard just long lol and I’m willing to do the work if it helps any and the evaporators are dry and I’m not leaking any water and it’s a really dry climate out herebohica2xo wrote: ↑Sun Jun 27, 2021 5:08 pm Wow. 5 full minutes at max load. That is hitting it hard. Good news is a pressure ratio below 3:1 even with that beat down. I am going to say the fan clutch is hanging in there as well.
I am going to say your refrigeration loop is in pretty good shape, based on pressures. A "muggy" feel, and vent temps in the 80's would indicate some reheating to me. Perhaps a blend door issue. Given that an aftermarket company like Dorman makes blend doors for the 2000 Excursion might be a reason to look there...
Also check the evaporator drain. If water is not leaving the evaporator case it can feel muggy when the car is that hot.
FYI that 5 minute run you did is like pulling the 23 foot daycruiser up the hill out of Willow Beach.
Insulating the roof could be done. It would require removing the headliner and carefully prepping the truck to spray the underside of the roof. If that is something within your mechanical abilities. I can't think of anybody doing that job commercially.
Tim wrote: ↑Sun Jun 27, 2021 5:15 pm Depends on how much you want to spend and still never be sure you will have the temp you want. I mean If it helps I’ll spend the money it will just take me awhile to save up for it
https://www.secondskinaudio.com/sound-d ... damplifier
I’ll have to look into those . Heater hose is coldtbirdtbird wrote: ↑Sun Jun 27, 2021 5:18 pm We use HushMat here in the cars we install AC in.
No spray, it is self adherent. Easy to apply. Cut pieces to shape to be able to tightly cover entire roof.
Since re-heating has not been considered until just now with Bohica's post, feel both heater hoses in the engine compartment. One should be cold. If both hot, you are getting reheating inside the air box. Another way to check is to clamp off one or both heater hoses with a c-clamp or visegrips, using blocks of wood on either side of the jaws so as to not harm the hose
I’ll probably regret spaying it lol probably cover up something by accident lolbohica2xo wrote: ↑Sun Jun 27, 2021 5:26 pm Dynamat is not a great insulator, and pretty costly.
I have sprayed closed cell foam on the underside of vehicle roofs with great results. But you have to be very careful to prep the vehicle, because the overspray sticks to everything - forever.
Al alternative is mixing glass micro balloons with a coating. The transmissivity of that coating is very low for a 1mm thickness. I have never tried to spray it, or use it on an overhead surface. That would be a complete experiment. Rolled on a metal garage door inside facing south in Las Vegas it really provides a measured reduction on panel temperature.
Lots of choices depending on your skillset and how much you want to spend