Wayne.B wrote:


This talk about not coming up to operating temperature has me mildly
confused. Isn't that what the thermostat is for? My diesels will
come up to thermostat temperature at slow idle with no load at all.

What am I missing?


Don't think you are probably missing anything.

A diesel will idle at relatively low RPM.

This low RPM may not allow the engine to come up to operating
temperature(with or without a thermostat).

Result is incomplete combustion which will allow unburned fuel to glaze
onto cylinder walls.

The result of that is a very expensive repair bill.

Lew

That's probably why we didn't have any problem with the
route vehicles. The 5-10 minute drive to the next stop
made sure that the engine stayed up at operating temp.

Don W.

Lew Hodgett wrote:
Wayne.B wrote:


This talk about not coming up to operating temperature has me mildly
confused. Isn't that what the thermostat is for? My diesels will
come up to thermostat temperature at slow idle with no load at all.

What am I missing?


Don't think you are probably missing anything.

A diesel will idle at relatively low RPM.

This low RPM may not allow the engine to come up to operating
temperature(with or without a thermostat).

Result is incomplete combustion which will allow unburned fuel to glaze
onto cylinder walls.

The result of that is a very expensive repair bill.

Lew