Quote:
Originally Posted by Jim H
Coolant in the engine won't do much good unless it can circulate. Without circulation it is just sitting in the engine's water jacket passages and heating up like the rest of the metal in the block.
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Coolant will thermosyphon if the thermostat is open and air flow across the rad will keep temps somewhat controled. Not for heavy load / low ait flow through.
Quote:
Originally Posted by Jim H
The Cadillac Northstar engines claims to be able to run with low or no coolant. Its engine management system severely limits the power output and shuts off cylinders to keep heat created to a manageable level. It is supposed to do this for short distances, like to get you to a safe place.
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It shuts off the injector to different cylinders but keeps the valves operating to pump air through the cylinders offering some cooling. This effect is also why it is bad to idle a diesel as it leads to wet stacking.