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06-5 0000-00 2) Inspection of Turbocharger On-board Inspection 1. Check the bolts and nuts foe looseness or missing Check the intake and exhaust manifold for looseness or damage Check the oil supply pipe and drain pipe for damages Check the housing for crack and deterioration - - - - Inspection of turbine 2. Remove the exhaust pipe at the opening of the turbine and check, with a lamp, the existence of interference of housing and wheel, oil leakage and contamination (at blade edge) of foreign materials. Interference: In case where the oil leak sign exists, even the small traces of interferences on the turbine wheel mean, most of times, that abrasion has occurred on the journal bearing. Must inspect after overhauling the turbocharger. Oil Leakage: Followings are the reasons for oil leakage condition - - Problems in engine: In case where the oil is smeared on inner wall section of the exhaust gas opening. Problems in turbocharger: In case where the oil is smeared on only at the exhaust gas outlet section. * * When problem occurs with the turbocharger, it could cause engine power decline, excessive discharge of exhaust gas, outbreak of abnormal noise and excessive consumption of oil. Idling for long period of time can cause oil leakage to the turbine side due to low pressure of exhaust gas and the rotation speed of turbine wheel. Please note this is not a turbocharger problem. Oil Drain Pipe Defect In case where oil flow from the turbocharger sensor housing to the crank case is not smooth would become the reason for leakage as oil builds up within the center housing. Also, oil thickens (sludge) at high temperature and becomes the indirect reason of wheel hub section. In such case, clogging and damage of the oil drain pipe and the pressure of blow-by gas within the crank case must be inspected. Damages due to Foreign Materials When the foreign materials get into the system, it could induce inner damage as rotating balance of the turbocharger gets out of alignment. - - |