answered
On a thermostat the coils always face the engine and the dome faces the radiator hose. The hot coolant heats the coils and causes them to contract opening the ''valve" to let coolant through the hose and into the radiator. Hope this helps!
answered
Are you asking how the sensor works with the teeth(ring)
or are you asking how missing tooth in the reluctor ring works?

The sensor is a hall effect sensor which reads each tooth on the ring by magnetism and pulses a signal to the ECM telling the precise location. When it hits certain gaps … Read more
answered
In 97 your diesel is a Direct injected Powerstroke. You can run a percentage of waste vegtable oil or Biodiesel and it will be fine. It will not ruin your engine reguardless of what people are told and hearsay. I run it I'm my 2000, which is the same engine, and have for about 50,000 … Read more