CONDITION POSSIBLE CAUSES CORRECTION
INADEQUATE HEATER
PERFORMANCE. GUAGE
MAY OR MAY NOT READ
LOW.
1. Heavy duty cooling system, and
cooler ambient temperatures.
1. None. Normal condition.
2. Obstruction in heater hoses. 2. Remove hoses, remove obstruction.
3. Water pump damaged. 3. Replace water pump.
HEAT ODOR 1. Damaged or missing drive line heat
shields.
1. Repair or replace damaged or
missing heat shields.
2. Thermal viscous fan drive damaged. 2. Check thermal viscous fan drive.
(Refer to 7 - COOLING/ENGINE/FAN
DRIVE VISCOUS CLUTCH -
DIAGNOSIS AND TESTING)
7a - 4 COOLING - 2.7L DIESEL WG
COOLING - 2.7L DIESEL (Continued)
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