DaimlerChrysler SPRINTER2006 Service Manual page 37

VA
CONDITION
TEMPERATURE GAUGE READ-
ING INCONSISTENT ( ERRATIC,
CYCLES OR FLUCTUATES)
RADIATOR CAP LEAKING STEAM
AND /OR COOLANT INTO RES-
ERVOIR BOTTLE. (TEMPERA-
TURE GAUGE MAY READ HIGH)
HOSE OR HOSES COLLAPSE
WHEN ENGINE IS COOLING.
NOISY FAN
INADEQUATE AIR CONDITIONER
PERFORMANCE (COOLING SYS-
TEM SUSPECTED)
POSSIBLE CAUSES
13. Brakes dragging.
1. Heavy duty cooling system, ex-
tream cold ambient (outside) tem-
perature or heater blower motor in
high position.
2. Temperature gauge or gauge
sensor defective.
3. Temporary heavy usage or load.
4. Air traped in cooling system.
5. Water pump
6. Air leak on suction side of water
pump.
1. Radiator cap defective.
2. Radiator neck surface damaged.
1. Vacuum created in cooling sys-
tem on engine cool-down is not
being relieved through coolant re-
servior/overflow system.
1. Fan blade(s) loose, damaged.
2. Thermal viscous fan drive.
3. Fan blades striking surrounding
objects.
4. Thermal viscous fan drive bear-
ing.
5. Obstructed air flow through radi-
ator.
1. Radiator and/or A/C condenser
air flow obstructed.
2. Thermal viscous fan drive not
working.
3. Air seals around radiator dam-
aged or missing.
COOLING 7 - 3
CORRECTION
13. Check brakes. (Refer to 5 -
BRAKES/HYDRAULIC/MECHANI-
CAL - DIAGNOSIS AND TESTING)
1. None. System operating norma-
ly.
2. Check gauge. (Refer to 8 -
ELECTRICAL/INSTRUMENT CLUS-
TER - DIAGNOSIS AND TESTING)
3. None. Normal condition.
4. Fill cooling system (Refer to 7 -
COOLING - STANDARD PROCE-
DURE).
5. Replace water pump.
6. Check for leak. (Refer to 7 -
COOLING - DIAGNOSIS AND
TESTING)
1. Replace radiator cap.
2. Replace radiator.
1. Replace radiator cap, check vent
hose between radiator and reser-
voir 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 as-
sembly.
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 re-
place as necessary.