Gone but not forgotten
- Jan 30, 2001
- Hermosa Beach, CA
- 1987 Z51 Silver Coupe
This was in the new America's Sportscar:
C4 and C5 Coolant Temperatures
by Jerry Watts
This doesn't seem to be the time of year to be concerned about coolant temperature, but running too cool a coolant temperature can also damage your engine.
Although the standard 180° thermostat is ideal, some Vette owners have been tempted to switch to a 160° thermostat. The lower temperature thermostat will result in uneven temperatures throughout the engine, causing unnecessary wear.
The average coolant temperature for a C4 or a C5 is around 205°, but even 230° is not a cause for concern since temperatures must reach 212° and 228° before the cooling fans come on. It's not until you get close to 250° that you need to be concerned, since boiling occurs at 262°.