Quote:
Originally Posted by Rick Parker
If the bypass is available and accessable what is gained (on a street driven car) by not using it?
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That coolant that is constantly recirculated though the pump bypass does not pass through any sort of heat exchanger. If you plug that hose the water that once was recirculated without heat exchange is now forced to go through the radiator and benefit from heat rejection. By plugging the bypass you marginally increase the heat rejection capability of your cooling system. In my case the expense of doing so doesn't provide sufficient justification for the plugged bypass.