Quote:
Originally Posted by Schrade
Is there a divider in this cross-over???
One is thermostat controlled (P side), and the D side isn't...?
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NO 
There is no divide....the flow just goes where there is least resistance.....Recycle (injector housing coolant manifolds back to water pump directly) through end of spring loaded thermostat until main thermostat opens by temperature rise.
The coolant then flows through radiator (path of least resistance) unless your revs are high....then part recycle through spring loaded end of thermostat to keep radiator pressure at acceptable levels.
See LT5 Thermostat operation