[BotaBigot]

Originally Posted by bx24

John-

I was thinking about using the cookie sheet to restrict the flow to cause things to run hotter knowing that I was going to expel the heat inside the cab with the CPU coolers. Because of my assumptions with the coolant flow rates, I am basically using the CPU coolers as heater cores. I just like the mounting flexibility that comes with the CPU coolers. What is the normal in and out sizes for an automobile heater core? 5/8 or 3/4? I figure the main radiator would still provide some cooling (given the cold outside temps) with the two CPU coolers picking up the rest of the load. The main thing was that I did not want to be sucking all of the warm air our of the cab.

Heater cores can use both sizes, some even one of each.

I'm concerned that CPU water coolers may not provide enough heat transfer, given the variables of outside temp and engine loads. However, that black plastic under the battery looks like it might deflect some airflow under the tractor. If so, your "cookie sheet" on just the upper 2/3 would block airflow thru the cab and possibly still allow enough winter cooling. Worth investigating.