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Symptom:
THE CLUTCH DOES NOT "DISENGAGE"
3. Clutch discs stuck together.
-
Clean or replace.
4. Clutch discs or support plate distorted.
-
Replace.
5. Clutch parts are worn out or damaged.
-
Check clutch condition. Replace worn out or damaged parts.
CYLINDER HEAD AND CYLINDER
Symptom:
UNUSUAL ENGINE NOISE AND/OR VIBRATION AT IDLE SPEED
1. Incorrect valve clearance.
-
Adjust valve clearance.
2. Faulty decompressor (located on exhaust camshaft).
-
Check decompressor spring operation. Replace it if necessary.
-
Check if decompressor is stuck. Clean and/or replace decompressor mechanism.
3. Faulty chain tensioner.
-
Check chain tensioner spring for wear or damages. Replace.
-
Check chain tensioner operation. Replace defective parts.
4. Check engine oil pressure.
-
Check items 1 to 6 of LOW OR NO OIL PRESSURE.
Symptom:
UNUSUAL ENGINE NOISE AND/OR VIBRATIONS WHILE OPERATING
1. Check items 1 to 4 of UNUSUAL ENGINE NOISE AND/OR VIBRATION AT IDLE SPEED.
2. Faulty chain guides.
-
Check chain guides for wear. Replace
3. Timing chain and sprockets.
-
Check sprocket screws tightening. Tighten to recommended torque.
-
Check sprockets for wear or other damages. Replace chain and sprockets.
-
Check if the timing chain is stretched. Replace chain and sprockets.
4. Broken valve spring.
-
Check valve springs condition. Replace defective parts.
5. Camshaft wear.
-
Check camshaft for heavy wear. Replace.
CRANKSHAFT AND BALANCER SHAFT
Symptom:
UNUSUAL ENGINE NOISE AND/OR VIBRATIONS
1. Misalignment of crankshaft and balance shaft.
-
Check if marks on balancer shaft and crankshaft are aligned. Readjust position of balancer shaft
and crankshaft.
2. Crankshaft bearing failure.
-
Check crankshaft bearings for damages. Replace crankshaft and bearings.
vmr2008-007
Section 02 TROUBLESHOOTING
Subsection 01 (TECHNICAL GUIDELINES (ENGINE))
(cont'd)
13
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Table of Contents
Troubleshooting
