Precautions for Turbocharger


1.Precautions on handling

(1) The engine oil used for the engine equipped with the turbocharger is used for not only lubricating the engine but for lubricating and cooling the turbocharger. As the engine oil is exposed to the heat of the turbocharger, its temperature rises easily. For this reason, the engine oil and engine oil filter maintenance should be carried out faithfully. Otherwise it causes the turbocharger to damage. If the recommended engine oil is not used, it causes the bearings of turbocharger to be damaged. Therefore, be sure to use the recommended engine oil.

HINTRefer to the Owner’s Manual or Maintenance Schedule as the replacement intervals of the engine oil and oil filter vary by the model or condition under which the vehicle is used.

(2) Since the bearings are not sufficiently lubricated just after starting a cold engine, racing or sudden acceleration of the engine causes damage to the bearings.

(3) After the engine is placed under heavy loads, such as after high-speed driving or long distance driving, allow the vehicle to idle for a few minutes before shutting it off.


The turbocharger temperature does not rise too high while driving as the turbocharger is cooled by the oil and coolant. When the engine is stopped immediately after high-speed driving, etc., circulation of the oil and coolant stop. This causes the turbocharger to remain uncooled, leading to damage such as sticking. Thus, it is necessary to idle and cool the turbocharger.

2. Precautions on maintenance

(1) Do not start the engine with the air cleaner or air cleaner case removed. Otherwise it will allow foreign particles to enter causing damage to the compressor wheels and turbine.

(2) In the case that the turbocharger malfunctions and must be replace, first check the following items for the cause of the problem and remedy as necessary.

Engine oil level and quality

Conditions under which the turbocharger was used

Oil lines leading to the turbocharger

(3) When removing the turbocharger, plug the intake and exhaust ports and oil inlet to prevent dirt or other foreign materials from entering the system.

(4) When removing and reinstalling the turbocharger, do not drop it, bang it against anything, or grasp it by easily deformed parts, such as the actuator or rod.

(5) When replacing the turbocharger, check for the accumulation of carbon sludge in the oil pipes, and if necessary, clean out or replace the oil pipes, too.

(6) When replacing the turbocharger, put the oil into the turbocharger oil inlet and turn the compressor wheel by hand to spread oil on the bearings.

(7) When overhauling or replacing the engine, cut the fuel supply after reassembly and crank the engine for 3seconds to distribute oil throughout the engine. Then idle the engine for 6seconds.

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