Engine Shutdown
Shut down the engine immediately if:
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the oil pressure gauge needle swings back and forth or falls sharply;
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engine power and rpm fall, even though the accelerator pedal remains steady;
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the exhaust pipe gives off heavy smoke;
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the coolant and/or oil temperature climb abnormally;
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abnormal sounds suddenly occur in the engine or turbocharger.
Important: Bearings and seals in the turbocharger are subjected to the high heat of combustion exhaust gases. While the engine is running, this heat is carried away by oil circulation, but if the engine is stopped suddenly, the turbocharger temperature may rise as much as 115°F (46°C).
- With the vehicle stopped, place the transmission in Neutral (N), or if so equipped, the Park (P) or Park Brake (PB) position.
- Set the parking brake.
- Idle the engine for three to five minutes before shutting it down. This allows the lubricating oil and the coolant to carry heat away from the combustion chambers, bearings, shafts, etc. This is especially important with turbocharged engines. The extreme heat can cause bearings to seize or oil seals to leak.
- Shut down the engine by turning the ignition switch to the OFF position.
Notice: Do not rev the engine before shutting it down. Revving the engine before shutdown will damage the turbocharger.
Note: Long periods of idling are not good for an engine because the combustion chamber temperatures drop so low that the fuel may not burn completely. This will cause carbon to clog the injector spray holes and piston rings, and can result in stuck valves.