B4000 SE Cab Plus 4WD V6-4.0L OHV (1997)
Coolant: Testing and Inspection
Engine Coolant Protection Inspection
CAUTION: Do not use recycled coolant. Do not use alcohol-based coolant. Use only soft (demineralized) water in the coolant mixture.
1. Measure the coolant temperature and specific gravity with a thermometer and a hydrometer.
2. Determine the coolant protection by referring to the graph as shown.
3. If the coolant protection is not proper, add water or coolant as necessary.
