TM 9-2320-387-24-l
ENGINE COOLING
/
FROM 6, \
DIAGNOSTIC FLOWCHART
_
KNOWN INFO
COOLANTOK
PRESSURE
CAP OK
HOSES OK
SURGE TANK OK
OIL COOLER OK
ENGINE FAN OK
POSSIBLE
PROBLEMS
RADIATOR
WATER PUMP 8 PULLEY
SERPENTINE
BELT
INSPECT THE RADIATOR. IS
IT IN GOOD CONDITION (FINS
NOT BADLY BENT OR
BLOCKED)?
ST OPTIONS
LOCK
REASON FOR QUESTION
Bent or blocked fins prevent
efficient cooling of the coolant.
KNOWN INFO
COOLANT OK
PRESSURE
CAP OK
RADIATOFUHOSES
OK
SURGE TANK OK
OIL COOLER OK
ENGINE FAN OK
POSSIBLE
PROBLEMS
WATER PUMP 8 PULLEY
SERPENTlNE
BELT
KNOWN INFO
RADIATORMOSES
OK
SURGE TANK OK
OIL COOLER OK
ENGINE FAN OK
PUMP 8 PULLEY OK
POSSIBLE
PROBLEMS
SERPENTlNE
BELT
MERNAL
ENGINE
LEAKS
INSPECT THE WATER PUMP
AND PULLEY. ARE THEY IN
GOOD CONDITION?
LOOK AND LISTEN.
IS THE SERPENTINE BELT IN
GOOD CONDITION?
VISUAL INSPECTION
OF
BELT TENSIONER
PosmoN.
REASON FOR QUESllON
If belt tensioner has fully
retracted, belt is to be replaced
because it will not drive the fan
PwedY.
2-164
