A/C question

The capillary tube from the extension valve needs to go next to the outlet tube on your evaporator. The capillary tube from the A/C temp switch needs to be inserted into that little whole. Just push it in a couple of inches or several cm. You may have to wiggle it some to get it to go in-between the fins.

Alasora,

I understand what you mean but when I look through the little grommet hole with the camera all I can see is the end plate of the evaporator core with the tubes, no way to get the capillary in to the fins from that hole. I think I am going to have to remove the dash.

Thanks for your help.

Johnny

I just went an looked at mine old evaporator there is a little hole in end plate for the capillary tube to pass through. Try removing all the gummy sealant around the input/out put tubes to see it better.

hey Johnny, send me you email address, cj@tur.co.nz i may have some photos that help i pulled my heat box to bits and rebuilt in my rest.

cheers mate cj

Chris/Alasroa,

I managed to do it without taking the dash out and pulling the heater box apart, I cheated and pulled the rubber drain pipe off the back of the heater box and looked up the tube with a torch, I could clearly see the evaporator so I gently pushed a piece of wire into the fins to make an entrance and then stuck the capillary tube into the core approx 1". I was careful to position the tube at the top of the pipe so that the water will still drain out of the car and not onto the carpet. I then cut a slit in the rubber drain pipe and clamped it back on. I will probably put a dab of silicone around where the capillary comes out of the top of the rubber pipe just to make sure. I think this should work.

Thanks for your help.

Regards, Johnny

Pic 2

I'm doing my A/C system too. I have talk to a lot of people and in the end you should replace the Evap.. Most people told me it work for a short time but not that great. Other told me it started leaking right away. If your doing 90% new why stop there..

Hi Mark, I dont think you would need to replace your Evaporator. They hardly ever fail or leak. They sit in a protected environment compare to the Condenser and they operate with a lot less pressure. Typically 50Psi where the High pressure side (Condenser) is 5-6 higher. The ones I have seen fail is due to people have drilled through them or over torqued the connections. But of course never say never ;-)

True you don't have to replace it. The new Evap. I did get is larger then stock with a smaller heater core. So I'm hoping for better cooling. When I work for Mercedes Benz, Evaps would fail 2nd to Condenser so for me if I'm going to do all this work on getting the A/C working I'm in 100%.

What one should replace is the dryer cannister and the evaporator valve under the dash, especially if you're planning on using R-134a or whatever the freon-of-the-week is, politics-wise. The new valves have no filter-screen for more flow due to the worse heat-capacity of R-134a and everything else compared to R-12.