Dodge 2001 Ram 1500 Owner's Manual page 349

7 - 14 COOLING
COOLING (Continued)
CONDITION
HOSE OR HOSES COLLAPSE
WHEN ENGINE IS COOLING.
NOISY FAN
INADEQUATE AIR CONDITIONER
PERFORMANCE (COOLING
SYSTEM SUSPECTED)
INADEQUATE HEATER
PERFORMANCE. GUAGE MAY OR
MAY NOT READ LOW.
HEAT ODOR
POSSIBLE CAUSES
1. Vacuum created in cooling
system on engine cool-down is not
being relieved through coolant
reservior/overflow system.
1. Fan blade(s) loose, damaged.
2. Thermal viscous fan drive.
3. Fan blades striking surrounding
objects.
4. Thermal viscous fan drive
bearing.
5. Obstructed air flow through
radiator.
1. Radiator and/or A/C condenser
air flow obstructed.
2. Thermal viscous fan drive not
working.
3. Air seals around radiator
damaged or missing.
1. Heavy duty cooling system, and
cooler ambient temperatures.
2. Obstruction in heater hoses.
3. Water pump damaged.
1. Damaged or missing drive line
heat shields.
2. Thermal viscous fan drive
damaged.
CORRECTION
1. Replace radiator cap, check vent
hose between radiator and reservoir
bottle for blockage also check
reservoir bottle vent for blockage.
1. Replace fan blade assembly.
2. None. Normal condition.
3. Locate contact point and repair
as necessary.
4. Replace viscous fan drive
assembly.
5. Remove obstruction.
1. Remove obstruction and/or clean.
2. Check fan drive. (Refer to 7 -
COOLING/ENGINE/FAN DRIVE
VISCOUS CLUTCH - DIAGNOSIS
AND TESTING)
3. Inspect air seals, repair or
replace as necessary.
1. None. Normal condition.
2. Remove hoses, remove
obstruction.
3. Replace water pump.
1. Repair or replace damaged or
missing heat shields.
2. Check thermal viscous fan drive.
(Refer to 7 - COOLING/ENGINE/
FAN DRIVE VISCOUS CLUTCH -
DIAGNOSIS AND TESTING)
BR/BE