AC help, please!

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TCBRacer77

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So I replaced all of my AC components last year (except hose) and finally had working AC for the first time since ive had my truck. Unfortunately it didn’t last long because the hose I didn’t replace popped and leaked while on a cross country road trip. I haven’t fixed it yet. lol. Upon diagnosis I realized I didn’t bother to check what oil came with my kit compared to the sticker on the compressor. Looks like rock auto gave me pag150 but the compressor calls for pag 46. I have a replacement hose and dryer, but before I crack into this again do I need to flush out the system and replace all oil with pag 46? I’ve been told pag 150 is fine lol but the compressor says otherwise, I used the UAC kit from rock auto. Also, I would need to replace the little filter thing (orifice)? Just trying to make the repair work out with no issues
 

L31MaxExpress

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So I replaced all of my AC components last year (except hose) and finally had working AC for the first time since ive had my truck. Unfortunately it didn’t last long because the hose I didn’t replace popped and leaked while on a cross country road trip. I haven’t fixed it yet. lol. Upon diagnosis I realized I didn’t bother to check what oil came with my kit compared to the sticker on the compressor. Looks like rock auto gave me pag150 but the compressor calls for pag 46. I have a replacement hose and dryer, but before I crack into this again do I need to flush out the system and replace all oil with pag 46? I’ve been told pag 150 is fine lol but the compressor says otherwise, I used the UAC kit from rock auto. Also, I would need to replace the little filter thing (orifice)? Just trying to make the repair work out with no issues
What compressor is it?
 

1998_K1500_Sub

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The only hose that runs to compressor, high side I guess, right where the joint is from rubber hose to aluminum fitting

The oil shouldn't have caused a failure. If you didn't remove the old oil and simply added 8oz more, or there's another reason for "too much oil", or there's too much refrigerant, the high-pressure side of the system will experience atypically high pressures.

It sounds like you did the AC work (but you didn't say specifically, the way it reads you might have bought the parts and had someone else do the work).
- Was the system flushed?
- How much oil did you add?
- What was the condition of the orifice tube PRIOR to replacing the compressor, i.e., was the screen clear or was there debris?
- How much refrigerant did you add? How did you measure the amount?
- You said "all" others components were replaced. Evaporator too?

There are probably other questions but these come to mind.
 

TCBRacer77

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The oil shouldn't have caused a failure. If you didn't remove the old oil and simply added 8oz more, or there's another reason for "too much oil", or there's too much refrigerant, the high-pressure side of the system will experience atypically high pressures.

It sounds like you did the AC work (but you didn't say specifically, the way it reads you might have bought the parts and had someone else do the work).
- Was the system flushed?
- How much oil did you add?
- What was the condition of the orifice tube PRIOR to replacing the compressor, i.e., was the screen clear or was there debris?
- How much refrigerant did you add? How did you measure the amount?
- You said "all" others components were replaced. Evaporator too?

There are probably other questions but these come to mind.
I did the work but I took it to a shop to be charged with refrigerant, I followed the instructions that came with kit, drained the oil that came in new compressor, filled with specified amount, the bottle was 8 oz which is what it called for. Kit also came with new orifice, but I did not replace evaporator (that’s component under dash right?) I am questioning the switch on back of compressor though, I’ve seen different switches that “match” my year and model from oreily’s but they have different psi ranges…
 

Dariusz Salomon

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The oil shouldn't have caused a failure. If you didn't remove the old oil and simply added 8oz more, or there's another reason for "too much oil", or there's too much refrigerant, the high-pressure side of the system will experience atypically high pressures.

It sounds like you did the AC work (but you didn't say specifically, the way it reads you might have bought the parts and had someone else do the work).
- Was the system flushed?
- How much oil did you add?
- What was the condition of the orifice tube PRIOR to replacing the compressor, i.e., was the screen clear or was there debris?
- How much refrigerant did you add? How did you measure the amount?
- You said "all" others components were replaced. Evaporator too?

There are probably other questions but these come to mind.
Hose was old and it failed-I have been replacing components one by one and there was weakest link that failed next tho all my underhood pipes/hoses were ok. If you add "too much oil"it just gonna cool less-shouldn't be the cause of failure. I use UAC Sanden 4440 and use pag150. Orifice tube is first thing you gotta check/replace-it will tell you if previous compressor was failing-if system was contaminated. If yes-you need to flush it or replace it.
And make sure you add right amount of refrigerant and oil-tho I added more and it is still ok to this day. AC can be a right pain in the back side.
 

Dariusz Salomon

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Capacities below.
 

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