Hello All
i will be swapping a new compressor, drier, and orifice tube soon. maybe this weekend. my 945T is the lucky car.
i dont 3-5 compressor swaps on 240s and one on 89 740.
can anyone tell me the benefits of a adjustable pressure switch on the reciever/drier?
i am guessing raising the low side cut out may cycle the compressor more and cool better.
i havent looked but is the evap coil more difficult to get to than the 240?
the evap coils i pulled from my 240s were 75% blocked with hair and gunk.
thanks
MIke

Mike,

I have never done an evaporator on a 240. Perhaps you can walk me through the pitfalls on that someday.

I assume that you have read the FAQ's, there is information there.

My evaporator experience is on a 94 944t. The first hurdle is locating and getting to the fasteners. I originally was going to write up the whole process of swapping the evaporator for the FAQ’s. While I have the images I am unable to find my notes! This first image locates all the fasteners:



Obviously the space is limited and removing the seat helps. Having the right tools is a bonus as well. The LED light stays cool and provides good illumination in small spaces. The small 8/32” offset open end wrench was a great help. The low profile ¼” drive rachet as well as the very long extension saved me on several of those pesky fastners.



I use this caulk for a lot of things but it was great for resealing the cover in this case. You can roll it in your hands to reduce the diameter to make it any size you want.

caulk


I could not get the new evaporator into position without taking the dash supports loose on the right side. I did not want to damage the evaporator so I took the dash loose. It has several fasteners that are hard to get to and seeming impossible to replace. The replacement was easier when I shortened one of the bolts- it was way longer than it had to be to begin with.

The grommet seal on the firewall fits on the lip of the metal that you see surrounding it in the engine compartment. The difficulty is that there is another layer of steel behind the grommet. A good fit probably helps in keeping water to the outside. I cleaned the grommet with ArmorAll and used it as a lube to get the grommet into place.

While you have the blower motor out invert it and see if you can oil the bushing on one end. My surround allowed this.

Good luck and contact me if you have other questions as I will search my memory bank.

Randy

Hello Randy
thats some good info.
was the evap coil all clogged up?
doesnt look like any fun to pull that coil.
thanks
Mike

No, very little debris in the cooling fins.

Is the 240 evaporator a major pain to swap out?

Randy

Hi Randy
i will leave the evap coil alone, the car blows cold on the highway but in the city its poor.
i believe its the original compressor so its probably worn internally.
the 240 evap coil isnt all that bad.
you must disconnect the lines down by the passenger foot and then try to get a good seal when you put it back together so it dont leak. (not alot of room to work)
sometimes i will go to the JY and practice on a car there so i dont break anything. (way too hot in the summer for this kind of practice)
well its a pain in the butt but nothing like the blower motor.
i dont really like to work on cars as much as i used to but would never pay someone to do what i can do.
thanks again
Mike

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