Ford F series Owner's Manual page 24

If, under any circumstances, the pointer moves
above the NORMAL band, the engine is
overheating and continued operation may cause
engine damage.
If your engine overheats:
1. Pull off the road as soon as it is safely
possible.
2. Turn off the engine. If you do not stop the
engine as soon as safely possible, severe
engine damage could result.
3. Let the engine cool. DO NOT REMOVE
COOLANT SYSTEM FILL CAP UNTIL
THE ENGINE IS COOL.
4. Check the coolant level following the
instructions on checking and adding coolant
to your engine, see Engine Coolant in the
Index. If you do not follow these
instructions, you or others could be injured.
For instructions on checking and adding coolant
to your engine, see Engine coolant in the Index. If
you do not follow these instructions, you or
others could be injured.
Engine coolant temperature gauge
22