Maintenance 4 : Spark Plug Replacement, Valve Adjustment and Timing Belt Replacement (V6 Only)

The spark plugs ignite the air/fuel   mixture in the combustion chamber. Replacement is necessary to maintain smooth engine power delivery, fuel efficiency and low exhaust emissions.

Valve clearance can change with normal wear and require periodic inspection and adjustment. Improper clearances can affect engine performance and efficiency and may cause abnormal noise.

The timing belt drives the engine's camshaft to open and close the intake and exhaust valves at the proper time. It also drives the water pump. The timing belt gradually wears and deteriorates and must be replaced to avoid failure and potentially severe engine damage. The water pump is easily accessed during timing belt replacement. It should be inspected and replaced if necessary.

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