Pontiac Sunbird Owner's Manual page 215

Service & Appearance Care
Adding Coolant-3. IL V6 Engine
(CONr)
To Add Coolant:
If you need more coolant, add the
proper
mix at the surge
tank.
2'14
radiator Pressure Cap
Your radiator cap is a 15 psi
(105 kPa) pressure-type cap and
must be tightly installed to prevent
coolant loss and possible engine
damage from overheating. Be sure
the arrows on the cap line up with
the overflow tube on the radiator
filler neck.
Vhen you replace your radiator
ressure cap, an AC@ pressure cap is
:commended.
Thermostat
Engine coolant temperature is controlled
by a thermostat in the engine coolant
system. The thermostat stops the flow of
coolant through the radiator until the
coolant reaches a preset temperature.
When you replace your thermostat, an
AC@ thermostat is recommended.