So, I guess you’re supposed to replace your fan clutch at the same time you replace your water pump. And I guess I should replace the serpentine belt, too. I’d rather inspect those two before just replacing them, though, since the cost is an additional $100.
Replaced both radiator hoses, the thermostat, and the ignition control module on the K2500 this weekend. We used money from Kevin’s truck fund.
The truck had no thermostat! It just had the shell of one. That partly explains the terrible fuel economy and rich running. Also, I discovered a vacuum line running to the charcoal canister that was disconnected from the throttle body. That clears up the vacuum leak sound and should also improve the fuel economy.
It runs and drives great, now. No stalling at all, very smooth power, and smooth shifts even under heavy throttle. With a thermostat, it should now warm up quicker (before, it took forever for the heat to happen, and the temperature needle would hardly move) as well as running cooler.
Unfortunately, it’s still leaking coolant. I think the water pump needs to be replaced. I shouldn’t have assumed it was a hose, but that’s really the most likely thing (and they should have been replaced anyway).