Loading ...
Loading ...
Loading ...
Main 11 Causes of Overheating
NGEC0492
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 section.
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
section.
4 쐌 Radiator cap 쐌 Pressure tester 78 - 98 kPa
(0.8 - 1.0 kg/cm
2
,
11 - 14 psi)
59-98kPa
(0.6 - 1.0 kg/cm
2
,
9 - 14 psi) (Limit)
See “System Check”,
“ENGINE COOLING
SYSTEM” in LC section.
ON*
2
5 쐌 Coolant leaks 쐌 Visual No leaks See “System Check”,
“ENGINE COOLING
SYSTEM” in LC section.
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 section.
OFF 7 쐌 Combustion gas leak 쐌 Color checker chemi-
cal tester 4 Gas ana-
lyzer
Negative —
ON*
3
8 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
section.
OFF*
4
9 쐌 Coolant return from
reservoir tank to radia-
tor
쐌 Visual Should be initial level in
reservoir tank
See “ENGINE MAINTE-
NANCE” in MA section.
OFF 10 쐌 Cylinder head 쐌 Straight gauge feeler
gauge
0.1 mm (0.004 in) Maxi-
mum distortion (warping)
See “Inspection”, “CYLIN-
DER HEAD” in EM sec-
tion.
11 쐌 Cylinder block and pis-
tons
쐌 Visual No scuffing on cylinder
walls or piston
See “Inspection”, “CYLIN-
DER BLOCK” in EM sec-
tion.
*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” in LC section.
TROUBLE DIAGNOSIS FOR OVERHEAT
KA24DE
Main 11 Causes of Overheating
EC-558
Loading ...
Loading ...
Loading ...