Contour Enthusiasts Group Archives Forums Modifications Zetec Maintenance Zetec - a few questions

Hello
would like to know if zetec water pump is plastic or metal impeller, and what is the significance of 180 degree thermostat. Is 180 different from factory default?

Thanks

read the PM I sent.

A lower temperature thermostat has always been a good way to help make power. Just as a FYI. Most performance engine builders(sean hyland motorsports, DSS, etc.) are not reccommending lower temp thermostats for engine use. Thier findings have shown that not allowing the engine to reach normal operating temperature (200 degrees?)leads to premature/excessive cylinder wall and piston ring wear. Now, I have always run 180's in my cars and have not had any problems. But they are the paid professionals. Just figured I'd let you know.

Optimal operating temperature of a gasoline engine is 180 degrees.
The 180 t-stat doesn't fully open till 190 degrees.

On my zetec temeperature is always right on M all the time, and it does not veer higher even in high heat/ac on or idling for long time. I was just curious what is the significance. Zetecs always feel like they are running very hot becasue of the darn cat that is practically bolted right under the hood. It radiates a lot of heat felt when one opens the hood, but it is not the engine heat, just a cat.