Explorer Sport Trac 2WD V6-4.0L (2009)
Heater Core: Testing and Inspection
Heater Core
Climate Control System
Component Tests
Heater Core
1. NOTE: If a heater core leak is suspected, the heater core must be tested by carrying out the plugged heater core component test before the heater
core pressure test. Carry out a system inspection by checking the heater system thoroughly as follows: See: Heater Core - Plugged
Inspect for evidence of coolant leakage at the heater water hose to heater core attachments. A coolant leak in the heater water hose could follow
the heater core tube to the heater core and appear as a leak in the heater core.
2. NOTE: Spring-type clamps are installed as original equipment. Installation and overtightening of non-specification clamps can cause leakage at
the heater water hose connection and damage the heater core.
Check the integrity of the heater water hose clamps.
