Ranger 4WD V6-3.0L VIN U (1997)
Heater Core: Testing and Inspection
Leak /Pressure Test
LEAK TEST
Heater Hose Disconnect Tool
Special Service Tool Required
1. Inspect for visible evidence of coolant leakage at the heater water hoses to heater core. A coolant leak at the heater water hose could follow the
heater core tube in the heater core and appear as a leak in the heater core.
2. Check the system for loose heater hose clamps. The clamps should be tightened to 2-3 Nm (18-27 lb-in).
3. If leakage is found and the hose clamps are tight, check the heater core tubes for distortion. Severe distortion of the tubes could cause leakage at
the hose connection.
