wsm wg972-e4 Workshop Manual page 95

WG972-E4, WSM
Symptom
Lubricant Oil
Consumption Is
Excessive
Engine Overheats
Engine Noise
Exhaust Flames
: Refer to Diagnosis Manual
Probable Cause and
Checking Procedure
1. Oil leakage from oil seal,
gasket, etc.
2. Damaged valve stem seal
3. Piston ring and liner worn
or stuck
1. Insufficient engine oil
2. Fan belt broken or
elongated
3. Coolant insufficient
4. Excessive concentration of
antifreeze
5. Radiator net or radiator fin
clogged with dust
6. Inside of radiator or
coolant flows route
corroded
7. Damaged fan or radiator or
radiator cap
8. Damaged thermostat
9. Damaged temperature
sensor
10.Overload running
11.Head gasket damaged or
water leakage
1. Improper valve clearance
2. Spark knock due to low
octane fuel or carbon
3. Rattles from loosely
mounted external
components
1. Damaged spark plug
2. Damaged ignition coil
3. Wires disconnection or
damaged
4. Bad connection of ignition
coil and spark plug
Solution
Replace
Replace
Replace
Check engine oil level
Refill oil as required
Check and adjust fan belt or replace
Refill coolant
Add water only or change to coolant with
the specified mixing ratio
Clean net or fin carefully
Clean or replace radiator and parts
Replace damaged parts
Check thermostat and replace
Check temperature with thermometer
and replace
Reduce load
Replace
Adjust
Use higher-octane fuel and remove
carbon
Retighten
Check and adjust or replace
Check and replace
Check the wire harness
Reconnect or replace
Reconnect
1-S4
ENGINE
Reference
Page
–
1-S29
1-S50,
1-S56
G-11
G-10
1-S17
G-25, G-26
G-26
–
G-25
–
1-S17
1-S23
–
–
1-S15
1-S20,
1-S21,
1-S40
–
1-S20,
1-S21
1-S21
–
–
–
9Y1211108ENS0118US0
KiSC issued 07, 2015 A