Toyota 17201-42011 TURBOCHARGER Sub-Assembly

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The turbocharger increases power by compressing the fuel/air mixture before it enters the combustion chamber by using the exhaust gases passed through a turbine, the degree of utilization of boost is regulated by an assembly of the waste gate connected to a spring which, in turn allows part of the exhaust gases to bypass the turbine. Intake air which is compressed and being hot is first cooled by an intercooler that is usually positioned in front of the radiator with the aim of increasing the density of the air through cooling to boost the engine output. That means do not race or accelerate suddenly especially when the engine is cold, and do not stop the engine immediately you are through with tows, speeding or on a hilly terrain, give it some few minutes of idling after towing or speeding, 1-2 minutes depending on the driving condition. Further, the driving without an air cleaner is prohibited as the foreign particles can get into the intake system and damage severely the turbine and impeller wheels, with speeds varying between 20, 000 and 110, 000 rpm.

Because the turbine wheel rotates at speeds up to 110,000 rpm, severe damage can result from the interruption of coolant or contamination of the oil supply to the turbine bearings. Check for leaks in the coolant and oil inlet lines and obstructions in the oil drain-back line, as this can cause severe oil loss through the turbocharger seals. Burned oil on the turbine housing is a sign of this. Caution: Whenever a major engine bearing such as a main, connecting rod, or camshaft bearing is replaced, the turbocharger should be flushed with clean oil.

Remove the air cleaner ducts and hoses as necessary, then disconnect the three air hoses and the PCV hose.