AC Discharge Line Common Failure?

My AC was warm last month so I added refrigerant and charged it back to normal. As part of troubleshooting I cleaned the dust and grime off of all AC lines. Only really dirty online was the discharge hose pipe. It wasn’t gunned up but had higher than normal grim accumulation.

today I inspected it and I can see the rubber portion is a little wet and there’s oil collecting on its low point.

I suspect this is a common failure point in the AC system. I didn’t see many threads on it but as these trucks age I suspect the hose pipe assembly will start to fail on many trucks.

ordering a rock auto fridge magnet but it also comes with a new Denso condenser, 4 seasons discharge hose pipe, and new o rings to use on the condenser. I’ll have a shop evac the existing refrigerant so I can swap the parts out and go back for them to add R134a and oil to the system.

 

I don’t know if it’s common, but I had a failure right where a clamp secured the line to the crossmember. I noticed yellow/green drip in the snow and followed it upwards. I hadn’t used A/C in at least 6-months prior, so it was only good luck I spotted the drip.

 

That looks like the low side. But that’s another good point to look out for failure if the rubber isolator has broken down and it’s now metal on metal.

 

You could also change out the expansion valve while doing all this work. Bit of a pain but not really that bad.

 

Is it necessary? I don’t exactly feel like doing it unless it’s another failure at higher mileage


I did just look it up. Doesn’t look that difficult to get to. Just need to find one of those AC line filters