Section 03
ENGINE
Subsection 02
(TROUBLESHOOTING)
VMR2004_006_03_02A.FM
03-02-5
CYLINDER AND HEAD
SYMPTOM
OIL CONTAMINATION (WHITE APPEARANCE)
CONDITION
NORMAL USE.
Test/Inspection
1. Check weep hole if water and oil leaks.
a. Leakage of oil/water mixture from bore means damaged water pump seal ring and
rotary seal.
Replace sealing ring, rotary seal and refill with recommended oil and/or coolant
(refer to COOLING SYSTEM and MAGNETO COVER).
2. Check cylinder head and/or cylinder base gasket.
a. Gasket damaged or leaking.
Retighten cylinder head with recommended torque and/or replace gasket.
3. Check screws for torque.
a. Screws not fixed.
Retighten screws with recommended torque and/or replace oil.
4. Check oil for particles (may indicate possible damages inside the engine).
a. Oil contamination due to metal or plastic particles.
Replace possibly damaged parts. Use Bombardier recommended oil
(refer to TECHNICAL DATA).
SYMPTOM
UNUSUAL ENGINE NOISE AND/OR VIBRATION IN IDLE SPEED.
CONDITION
NORMAL USE.
Test/Inspection
1. Check operation of decompressor located on camshaft.
a. Decompressor shaft stucks and/or torsion spring is damaged.
Replace spring and/or decompressor mechanism.
2. Check chain tensioner operation.
a. Faulty chain tensioner.
Replace spring and/or mechanism.
SYMPTOM
UNUSUAL ENGINE NOISE AND/OR VIBRATIONS WHILE OPERATING.
CONDITION
NORMAL USE.
Test/Inspection
1. Check items 1 and 2 of UNUSUAL ENGINE NOISE AND/OR VIBRATION IN IDLE
SPEED.
2. Check noise coming from cylinder head area.
a. Chain guide worn out.
Replace chain guide.
b. Stretched chain and/or worn out sprockets.
Replace chain and sprockets.
c. Sprocket screws got loose.
Retighten screws with recommended torque.
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