Engine Coolant Temperature Gauge - Ford Thunderbird Owner's Manual

With ignition switch OFF, the fuel gauge
indicator may drift from the ignition switch ON
position.

Engine Coolant Temperature Gauge

This gauge indicates the temperature of the
engine coolant, not the coolant level. If the
coolant is not at its proper level or mixture, the
gauge indication will not be accurate.
The pointer moves from the C (cold) mark into
the normal band as your engine coolant warms
up. Under normal driving conditions, the pointer
should stay in the normal band. It is acceptable
for the pointer to fluctuate within the normal
band under normal driving conditions, and
under certain driving conditions such as, heavy
stop and go traffic, or driving up hills in hot
weather, for the pointer to indicate at the top of
the normal band.
If, under any circumstances, the pointer moves
above the normal band, the engine is
overheating and continued operation may cause
engine damage.
The engine coolant temperature gauge
21