Automotive Air Conditioning Information Forum

We bought a 1984 Jeep Cherokee in 1988, and that had manual service shut off valves (no schraeders at all) and their cover caps were loose fitting aluminum just to keep dust out.

In the early 1990s the compressor seized, and new compressors were about $600-$700 which was a ton then. I bought a ...

When I worked for Delphi Thermal, the refrigerant lines and hoses people informed me that the plastic caps are designed to be the primary seals- that's why they have a rubber element or washer or seal in them. The shraeder valves are there to hold in the refrigerant just long enough to get the ...

You are a solid 20oz light on refrigerant. I had the same vehicle, 99 Tahoe and it required 64oz.
I agree with Carguychris85 . Every specification that I have says the following: 64 ounces net weight of R-134a, and 11.0 fluid ounces of PAG-150 for an OE Harrison compressor. If you have an under ...

Today I replaced both of the O-rings on the high pressure/discharge line with brand-new green HNBR O-rings I already had. I pulled good vacuum, and added 2 cans of R134a. So we'll wait and see.

First I had to do a "fix" on the vacuum pump given to me by Armour Foods when they relocated from Arizona ...

Attach a real service gauge set and post both high side and low side pressures at 2000rpm after a couple minutes of operation.

Are you positive that the front system has just ONE orifice tube?

I believe that an AC pump is usually located lowest or as low as possible. I was told that this was so that the AC oil would pool

For the vehicles we have owned over the years, I cannot confirm that compressors are usually located as low as possible, and we currently have four with factory AC ...

I believe that an AC pump is usually located lowest or as low as possible. I was told that this was so that the AC oil would pool

For the vehicles we have owned over the years, I cannot confirm that compressors are usually located as low as possible, and we currently have four with factory AC ...

Before I take it into a repair shop, I was wondering if anyone has experienced this problem. I am worried about someone saying I have to replace the entire system and getting scammed. Thanks in advance for any feedback or suggestions.

We've had 1988, 1994, 2005, 2011, and now 2014 Suburbans and ...

Tim wrote: Wed Nov 26, 2025 8:05 am Santech makes very good O-rings in general. IMO, HNBR is HNBR. If kept closed in a bag or plastic case, out of sunlight. Should be good. Are they flexible?

Yes, flexible; look and feel same as brand-new.

Question 1: Do refrigeration O-rings just go bad after several years in use?

Question 2: shouldn't the O-rings in the Santech Nissan HNBR assortment kit be fine, or do I really need to use O-rings from Nissan ?????

Question 3: would it be OK to use new Santech HNBR O-rings that were purchased a ...