Heater Core: Notes
WARNING: This page is about a different car, the 2002 Ford Ranger. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
Spring-type clamps are installed as original equipment. Installation and overtightening of non-specification clamps can cause leakage at heater water hose connection and damage heater core.
NOTE:
Inspect for evidence of coolant leakage at heater water hose to heater core attachments. A coolant leak in heater water hose could follow heater core tube to heater core and appear as a leak in heater core. Check integrity of heater water hose clamps.