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Main 12 Causes of Overheating
NGEC0707
Engine Step Inspection item Equipment Standard Reference page
OFF 1 쐌 Blocked radiator
쐌 Blocked condenser
쐌 Blocked radiator grille
쐌 Blocked bumper
쐌 Visual No blocking —
2 쐌 Coolant mixture 쐌 Coolant tester 50 - 50% coolant mixture See “RECOMMENDED
FLUIDS AND LUBRI-
CANTS” in MA-13.
3 쐌 Coolant level 쐌 Visual Coolant up to MAX level
in reservoir tank and
radiator filler neck
See “Changing Engine
Coolant”, “ENGINE
MAINTENANCE” in
MA-26.
4 쐌 Radiator cap 쐌 Pressure tester 59 - 98 kPa
(0.6 - 1.0 kg/cm
2
,9-14
psi) (Limit)
See “System Check”,
“ENGINE COOLING
SYSTEM” in LC-11.
ON*
2
5 쐌 Coolant leaks 쐌 Visual No leaks See “System Check”,
“ENGINE COOLING
SYSTEM” in LC-11.
ON*
2
6 쐌 Thermostat 쐌 Touch the upper and
lower radiator hoses
Both hoses should be
hot
See “Thermostat” and
“Radiator”, “ENGINE
COOLING SYSTEM” in
LC-13, LC-14.
ON*
1
7 쐌 Cooling fan 쐌 CONSULT-II Operating See “TROUBLE DIAG-
NOSIS FOR OVER-
HEAT” (EC-1051).
OFF 8 쐌 Combustion gas leak 쐌 Color checker chemi-
cal tester 4 Gas ana-
lyzer
Negative —
ON*
3
9 쐌 Coolant temperature
gauge
쐌 Visual Gauge less than 3/4
when driving
—
쐌 Coolant overflow to
reservoir tank
쐌 Visual No overflow during driv-
ing and idling
See “Changing Engine
Coolant”, “ENGINE
MAINTENANCE” in
MA-26.
OFF*
4
10 쐌 Coolant return from
reservoir tank to radia-
tor
쐌 Visual Should be initial level in
reservoir tank
See “ENGINE MAINTE-
NANCE” in MA-26.
OFF 11 쐌 Cylinder head 쐌 Straight gauge feeler
gauge
0.1 mm (0.004 in) Maxi-
mum distortion (warping)
See “Inspection”, “CYL-
INDER HEAD” in EM-88.
12 쐌 Cylinder block and pis-
tons
쐌 Visual No scuffing on cylinder
walls or piston
See “Inspection”, “CYL-
INDER BLOCK” in EM-104.
*1: Turn the ignition switch ON.
*2: Engine running at 3,000 rpm for 10 minutes.
*3: Drive at 90 km/h (55 MPH) for 30 minutes and then let idle for 10 minutes.
*4: After 60 minutes of cool down time.
For more information, refer to “OVERHEATING CAUSE ANALYSIS”, LC-34.
DTC P0217 COOLANT OVERTEMPERATURE ENRICHMENT
PROTECTION (WITH ELECTRIC COOLING FAN)
VG33E
Main 12 Causes of Overheating
EC-919
GI
MA
EM
LC
FE
CL
MT
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
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