[Steve1968LS2]

Originally Posted by David Pozzi

Carl,
Was this with your old engine with cooler and radiator inlet on the same side? The LS enters the pass side right?

The way it should work is the oil heat exchanger should be on the radiator inlet side tank receiving the warmest coolant. I'm getting a Be Cool rad and it's double pass, they have to put the exchanger in the pass side tank.

Thermostat valves take up a bit of room especially with all the extra plumbing. The cleanest way would be to have it on the engine block. I don't think you need to actually shut off the rad cooler and open the bypass. I think just opening a bypass would be enough, the cooler should have enough extra resistance to flow that would not allow much flow thru it when the bypass is open.

A factory LS radiator (from GM) has the inlet on the drivers side and the exit (lower) on the pass side.

Most aftermarket LS radiators have the inlet and outlet both on the pass side to make plumbing cleaner. That's how my current AFCO is and how the C&R unit is.

My new AFCO will have both on the pass side and the cooler will be on the upper driver's side like the C&R unit.