We spent some more time working on the truck this weekend. It's hot here in AZ and this truck was never designed to do 80 down the freeway, so I'm trying to get it to cool better. The Delta PAG fans keep it nice and cool everywhere but on the highway, that's when temps start creeping up. Before I start adding more power, I want to get that taken care of. I picked up some filler plates from Classic Truck Products to prevent the air from going up and over the radiator rather than through.
They make working under the hood much nicer as it gives you a nice shelf to set all your tools on there.
We've been fighting the A/C system in this truck since we installed it and we attempted to make it work properly again by swapping out the expansion valve. We keep wrestling with low suction pressures and high discharge so I was thinking possibly the expansion valve was clogged or faulty. Unfortunately swapping it out didn't help anything, we pulled some refrigerant back out and I removed the insulation from the expansion valve pigtail. This seems to help a bit, but once the whole system is heat soaked, it takes a bit to get back to steady state. At least the compressor isn't coming on and off every couple seconds now.
While we were fighting with the A/C, we noticed that the fans were making some noise, after looking into it they both had started to rub, not to encouraging for fans that aren't even a year old, with very few hours on them. The shrouds both seem to be a bit oval shape now, very close/rubbing on the sides with about 1/8" clearance on the top and bottom.
I drilled a hole and bolted the shrouds together in the middle to give some clearance there, and I drilled a hole and put a screw in from the back side to push the outer edges out away from the fran.
This fixed the issue for now, but I'll probably send Delta PAG an e-mail. I'm assuming they warped a bit from heat, but who builds a radiator fan that can't handle high temps?
