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TECHNICAL GUIDELINES (ENGINE)
The following charts are provided to help in diagnosing the probable source of troubles. It should be used
as a guideline.
COOLING SYSTEM
Symptom:
HIGH ENGINE OPERATING TEMPERATURE
1. Low coolant level.
-
Check condition of hoses and hose clamps fixation. Tighten or replace.
-
Check if hoses are pinched or if the routing is good. Change the routing, repair or replace.
-
Check coolant drain screw on water pump housing. Tighten and/or replace sealing washer.
-
Check gaskets on water pump, cylinder head and cylinder. Tighten or replace.
-
Check leak indicator hole (located in clutch cover) if coolant leaks. Replace seal, refer to COOL-
ING SYSTEM.
-
Check if the self-bleeding system nipples on radiator or cylinder head are blocked. Clean or
replace.
-
Check engine oil for contamination (white appearance). Overhaul engine and repair.
2. Clogged radiator.
-
Check radiator fins for dirt or damages. Clean or replace.
3. Defective cooling fan.
-
Check if the cooling fan fuse is burnt. Replace.
-
Check if cooling fan motor turns. Replace.
-
Check condition of wires and connector. Repair or replace.
4. Defective thermostat (does not open when engine gets hot).
-
Replace thermostat. Refer to COOLING SYSTEM section.
5. Defective water pump.
-
Check water pump impeller for broken wings. Replace
-
Check if the spring pin retaining impeller is damaged. Replace.
6. Faulty temperature sensor.
-
Check if temperature sensor works properly. Replace.
7. Defective intermediate gear (less coolant supply).
-
Check if intermediate gear (located behind clutch cover) is worn out or broken. Replace.
-
Check if intermediate gear is clipped correctly onto needle pin.
LUBRICATION SYSTEM
Symptom:
LOW OR NO OIL PRESSURE
1. Low oil level.
-
Check condition of hoses and hose clamps fixation. Tighten or replace.
-
Check if the hoses are pinched. Change the routing, repair or replace.
-
Check oil drain plugs (engine and oil tank). Tighten and/or replace sealing washer.
-
Check O-rings and gaskets. Replace damaged parts.
-
Check crankcase screws tightening. Tighten to recommended torque.
-
Check crankcase for cracks or other damages. Replace crankcase.
-
Check leak indicator hole (located in clutch cover) if oil leaks. Replace seal, refer to COOLING
SYSTEM.
vmr2008-007
Section 02 TROUBLESHOOTING
Subsection 01 (TECHNICAL GUIDELINES (ENGINE))
11
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Table of Contents
Troubleshooting
