thermostat for LS Engine

To clear up some confusion,

The thermostat is the part in the housing where hose hooks up,
Where you see the freeze plug, THAT IS NOT A THERMOSTAT AREA, That is the Pressure Relief or the bypass

The Bypass is intended to keep the flow down so it does not blow plastic side caps off the radiator on passenger cars,

People put a hole in the free plug to allow some water to bypass, the hole is not needed, Redline and Katech do not use a hole, so any of the water flowing though the hole in a free plug will not flow through the head, but if you feel you need a hole in your delete, then put it one in,

If you block off the heater inlet and outlet with the U rubber tube, all that water will not run through the radiator, so you cut the cooling down by a large amount,
 
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