jej3

Well, took the 924s into the Tint shop yesterday to get the rear hatch re-tinted and the guy comes into the waiting area and says "We had to move your car and now it is steaming"

Well, I look at it and the AC line from what I believe is the receiver/drier (cylinder with sight glass) is leaking. The line is the one that runs back to the firewall of the car.

So, if this is indeed leaking, how do you fix this line? Can a competent line shop replace the rubber and splice in a connector for the hard line so I don't have to remove the entire line (including what goes through the firewall)?

It appears the line goes through the firewall so I can't even fathom having to take the whole line out.

Any advice is appreciated!

John_AZ

Easy.

DIY-2 hours or less.

https://rennlist.com/forums/924-931-...rly-944-a.html

Suggestions:
replace all the "O" rings inside the blower/evaporator housing. You can get most "O" rings in the big kit at AutoZone or the R134a conversion kit at Pelican:

http://www.pelicanparts.com/cgi-bin/...2%20%2C%20Each

Flush all the lines.
Replace the RD receiver drier
Add one (1) or two (2) ounces of oil to the compressor.

GL
John

John_AZ

Added,

I do not suggest a "splice".
If you have a leak in one part of the hose the rest of the hose is probably just as bad.

John

jej3

Thanks, John. Should I plan to replace the Evaporator at the same time as a WYAIT? I'm planning on getting a used line from one of the suppliers as new is not easilly found at a cost effective price.

Thoughts?

John_AZ

The evaporator will usually leak at soldered "elbows"



Unless you see oil spots or have a leak detector already injected in the freon, you may not know if it is bad.

I did replace mine when I replaced the expansion valve. Came as a used package price.

John

jej3

thanks, John. I actually meant Expansion Valve I appreciate the quick reply. Any idea if the Expansion to Receiver line is interchangeable between my 1987 924s and earlier 944?

John_AZ

Not without looking up the 944 expansion valve.

What I did find out is the 924S expansion valve only has one temp bulb attached.

When I ordered a new valve they sent the wrong valve with 2 temp bulbs attached.

Correct style:


Incorrect style:


Replacing the expansion valve is a good idea WYAIT but yours is probably good unless you remove it completely and inspect for blockage or know in advance it is bad.

John

jej3

Great insight! Should I pull the line and get it rebuilt using barrier hose (no idea of the cost) or go with a salvage line?

John_AZ

Slightly confused:

Line 1-
On the 924S there is a short line with the pressure switch that goes from the RD to condenser.
Line-2
There is a long line from the back of the firewall to the compressor-Evaporator-Expansion valve to compressor.
Line-3
There is a long line from the Receiver drier to the fire wall to evaporator.

I would replace line #2 & #3 at the same time if you plan to keep the car for a few years.

John

jej3

Yes, this calls for a picture...



I believe number 21 in the above picture is leaking. Options are to replace with Used, New or Rebuild with barrier hose.

Do you still think this is a 2 hour DIY?

Hope this helps!

John_AZ

Corrected my previous incorrect post.

The 2 hour figure was to remove the under dash blower motor/evaporator assembly.

A couple more hours getting the line(s) #21 & #23 removed and replaced.

You might just do #21 because you will be skilled in removing the assembly when done.

Another suggestion. Take pictures of the wires/hose on the assembly.

There is a hanger welded under the metal dash that the assemble slides into. If you do not have the wires and hoses correct, the blower assembly will not go in smooth. Trial and error.

GL
John