Lincoln Nautilus: Climate Control System - General Information / Heater Core Leak Check. General Procedures
Inspection
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NOTE:
A coolant leak in the heater hose could follow the
heater core tube to the heater core and appear as a leak in the heater
core.
Inspect for evidence of coolant leakage at the heater hose to heater core attachments.
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NOTE:
Spring-type clamps are installed as original
equipment. Installation and overtightening of nonspecified clamps can
cause leakage at the heater hose connection and damage the heater core.
Check the integrity of the heater hose clamps.
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Drain the coolant from the cooling system. Refer to
Cooling System Draining, Filling, and Bleeding procedure in Group 303.
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Disconnect the heater hoses from the heater core.
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Install a short piece of heater hose, approximately 101 mm (4 in) long on each heater core tube.
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Fill the heater core and heater hoses with water and
install the plug (221373) and the adapter (221374) from the Pressure
Test Kit. Secure the heater hoses, plug and adapter with hose clamps.
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Attach the pump and gauge assembly from the Pressure Test Kit to the adapter.
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Access the Pressure Test Kit Service Tools.
Refer to: Climate Control Tools and Equipment (412-00 Climate Control System - General Information, General Procedures).
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Close the bleed valve at the base of the gauge. Pump 138 kPa (20 psi) of air pressure into the heater core.
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Observe the pressure gauge for a minimum of 3 minutes.
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If the pressure drops, check the heater hose connections
to the heater core tubes for leaks. If the heater hoses do not leak,
replace the heater core. Refer to the appropriate heater core removal
and installation procedure in Group 412-00.
Leak detection
Review next note for important refrigerant system dye information.
NOTE:
Fluorescent refrigerant system dye is added to the
refrigerant system at the factory to assist in refrigerant system leak
diagnosis using a Rotunda-approved UV
lamp...
Activation
NOTE:
Use Refrigerant Identification Equipment to identify
gas samples taken directly from the refrigeration system or storage
containers prior to recovering or charging the refrigerant system...
Other information:
System Operation
Parking Aid - Audible
System Diagram
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Special Tool(s) /
General Equipment
Scraper for Straight Edges
Hot Air Gun
8 mm Drill Bit
MIG/MAG Welding Equipment
Spot Weld Drill Bit
Locking Pliers
Materials
Name
Specification
Seam SealerTA-2-B, 3M™ 08308, LORD Fusor® 803DTM
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Removal
NOTE:
Roof removed for clarity.
NOTE:
Factory welds may be substituted with resistance or me..