Town Car V8-302 5.0L (1987)
Heater Core: Testing and Inspection
Leak /Pressure Test
INSPECTION
1. Inspect for visible evidence of coolant leakage at the hose to heater core attachments. A coolant leak at the hose could follow the heater core tube
to the 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 1.81-2.49 Nm (16-22 in lb).
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.
PRESSURE TEST
1. Drain the coolant from the cooling system.
2. Disconnect the heater hoses from the heater core tubes.
3. Install a short piece of heater hose (approximately 101.6 mm (4 inches) long) on each heater core tube.
4. Fill the heater core and hoses with water and install plug BT-7422-B and adapter BT-7422-A from Rotunda model 21-0012 or equivalent in the
hose ends. Secure the hoses, plug and adapter with hose clamps.
Rotunda 21-0012 With Heater Hose And Clamps
5. Attach the pump and gauge assembly Rotunda model 21-0012 or equivalent to the adapter.
