Van overheats and spills coolant everywhere when hot. I changed water pump and thermostat but same issue. This van sat for many years and has only 60k miles and runs stellar. The coolant was rusty but no debris.

Im thinking the radiator is the issue, (which is cheap) but wanted to see what the experts say on here before I invest anymore into this POS.

 

Pick up a cheap IR temp gun, get the engine up to temp, and then start shooting various spots on the radiator. If temps vary quite a bit, yep, it's clogged. Could try flushing it first, before spending the money to replace it.

 

Got a cheap radiator OTW. Reload the parts canon! I’m just getting started!

 

Yes, it could be a plugged radiator. It could also be a bad head gasket pumping compression into the cooling system. Run it with the radiator cap off and watch for non-stop air bubbles in the coolant. If there is, then a bad head gasket moves up high on the list of possible causes.

 

I did notice that the flow increased and leaked out of the open radiator cap hole when I hit the throttle but thought that was because the new water pump was superseding the (potentially) clogged radiator. Wouldn't I get some steam/coolant out the exhaust pipe too? It's dry as a bone when running. If it's a head gasket, in the bin it goes!