You know Jeff I should have caught that, but swung and missed
The recessed Thermostat seat in the Cam House is for non-use of a By-Pass, but PMD realized the need to get a small amount of Coolant to flow before full warm-up.
This is why they used the By-Pass.
The By-Pass also has a recessed seat for the thermostat which is re-located to allow a small amount of flow before the Thermostat reaches operating temp (OPENS).
So the sequence is Cam House, Gasket, By-Pass, Thermostat, Gasket, Outlet.
You would think I could recite this stuff by now
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When I die, I want to go peacefully like my grandfather did, in his sleep.
Not screaming like the passengers in his car.