[dan4836]

After looking closely at my thermostat and housing, I found the thermostat installed does not close off the circuit (engine side). I have the older style manifolds and the bottom part of the thermostat is smaller than the hole that allows the coolant to flow back through the engine.

In other words, when the thermostat is closed, no water can go to the heat exchanger. when the thermostat opens, on top the coolant can flow from the bottom and through the thermostat to complete the circuit to the heat exchanger. Also, when the thermostat opens, it should close off the circuit that goes back through the engine.

- The thermostat foot is too small and does not make it to the bottom to close of the hole.

My research shows that only two thermostats are made for the 470. One for my style manifold and the other for the aluminum manifold set up.

Any suggestions?