GENERAL INFORMATION
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1. Valves:
a. The gap between the valve is not suitable.
b. Incorrect valve timing.
c. Worn or damaged valve seat surfaces.
d. Bent valves.
e. Weak or broken valve springs.
2. Cylinder head:
a. Loose spark plug or damaged spark plug hole.
b. Damaged cylinder head gasket.
c. Warped or cracked cylinder head.
3. The pressure relief system is damaged.
High Engine Compression
1. The pressure relief system malfunction.
2. Excessive carbon buildup in the combustion chamber.
Engine Overheating
(Cooling System)
WARNING
Do not remove the radiator cap, coolant drain plug or
disconnect any coolant hose immediately after or during
engine operation. Scalding fluid and steam may be blown out
under pressure and cause serious injury. When the engine
has been operated, the coolant is very hot and under
pressure. Attempting to remove the items when the engine is
hot can cause the coolant to spray violently from the radiator,
water pump or hose, causing severe burns and injury.
1. Low coolant level.
2. Air in cooling system.
3. Clogged radiator, hose or engine coolant passages.
4. Worn or damaged radiator cap.
5. Damaged water pump.
Engine Overheating
(Engine)
1. Improper spark plug heat range.
2. Low oil level.
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