Automotive Air Conditioning Information Forum

Update.

Opened the system up. Removed the new rear txv, the new rear evaporator and the new front accumulator. Flushed the rear hard lines with 1/2 gallon denatured alcohol and then 2 bottles of 4 season flush. Flushed the front evaporator with 1/2 gallon denatured alcohol and 1 bottle of 4 season ...

Ok,

Thanks. I will let you know how it goes.

Hi,

My 99 Expedition front compressor seal was leaking so I decided to replace the compressor. The pressure of the system had dropped down to 15 psi. I pulled the compressor, the condenser and the front orifice tube. The front orifice tube was loaded with debris. So I replaced the compressor lines ...

Thanks again!

Just wanted to update and thank all you guys!

We have been driving the Corvette the last 2 summers. AC has been working great thanks!

My son and I were able to find the leak in my son in laws GMC Yukon AC. Bad Schrader valve on low side! My son and I tracked it down in an hour and had him back on ...

You are not the first one to tell me I’m overthinking it!

Ok. I’ll leave it alone.

But what makes you pull the trigger to replace it? How bad of a leak at the valve would make you replace it?

Thanks again…. My son and I have learned a lot from you guys!!

Ok,

The low pressure Schrader was tight. So I loosened a quarter turn and tightened. Replaced cap and came back 30 minutes later. There is still a wisp of refrigerant when I remove the cap.

I can’t believe it because I pressure tested the system with nitrogen at 70 psi for over 24 hours with the ...

Again, thanks so much for the help. It looks like there is Mastercool that will do 134a and 1234yf on Amazon. The one for the 134a only is $68. The one that does both is $160! I think that it might be handy to have. My son and I have been doing this as a learning experience.

I will try to tighten ...

This probably a dumb question. There is a gasket on the low side port cap and it does appear to have PAG oil on it. Are you saying it is normal for there to be a slight leak with the valve and the cap is really what seals the system? Sorry I’m so dense.

And if there is a slow leak on the low side ...

I checked the static pressures and compared the gauges temperature readings. The pressure was equal on both high and low sides and was correct with the ambient temperature.

I noticed on my cheap gauges the 0 is a range on both high and low sides of about 5 on the low gauge and 10 to 15 estimated ...