If the engine or other parts has the problem, it is possible to break the exchange turbocharger again. Please confirm the notes below and inspect each part again.
<Insufficient lubrication , Running out of oil slick>
Insufficient lubrication or momentary loss of lubricating oil, can cause the high speed rotating turbine shaft(180,000rpm) to emit high temperatures (evident in purple temper colour) and thus, branding both the bearing & shaft.
Contaminants such as sludge, block oil passages that supply oil to the turbocharger. Shown in the above image, this can easily block oil feed supply line. Oil blockage from this would thus cause turbine wheel shaft discolouration from heat, caused by in）
Insufficient lubrication or momentary loss of lubricating oil, can cause the high speed rotating turbine shaft to emit high temperatures (evident in purple temper colour) and thus, branding both the bearing & shaft
Excessive piston blow by or high internal crankcase pressure can cause oil leakage from turbocharger compressor or turbine seals.
In many cases, there is misrecognition of oil leak from turbocharger **For turcks and buses.
White smoke appears when engine oil burns in conbustor.
The turbocharger is not defective if the compressor or turbine wheels do not rub, are not bent and no abnormal problems felt if the wheel is spun by finger. Possible cause of lack of power or boost is a non pressurising system. The following conditions ca
<Engine lacks power or boost>
Incorrect actuator pressure adjustment. (Even high boost pressure can cause loss in fuel pressure and loss of acceleration).
Exhaust waste gate bypass valve (a swinging valve) can be siezed open. This causes an exhaust leak and does not allow any rise in boost.
Air cleaner hose/ pips are stuck or crush leak of pressure from boost hose or pipes
Compressor side: air leak caused by mulfunction of relief valve
Direct ignition (mulfunction of electronic)
In spite of changing the reman turbocharger, the same problem occurres again and repeat it. Turbocharger is supportive device for engine; the functions/performance are depend on the engine condition or other devices. The typical mulfunction of recurrence is lack of oil management.
Inspect oil feed inlet on centre housing, oil feed pipe and union bolt for blockage from oil sludge prior to installing turbocharger. All traces of sludge or foreign contaminants must be cleaned completely. Components that cannot be cleaned must be replac
Strongly recommended to use the oil 15W-40
Do not use engine flushing oil; We do not recommend for flushing with it. Please use the same grade of engine oil
Often caused by foreign objects in the compressor inlet duct. So always check intake system for foreign objects from the air cleaner all the way to the compressor housing.
In some instances foreign objects that damage the compressor or turbine wheels, will then cause an imbalance in the shaft. This can then cause metal contact between the bearing and the shaft if the imbalance is present and the turbocharger continues runn
Please check the oil drain pipe/inlet pipe for any filling, dirt, destruction, foreign objects or adhension of carbon. Please exchange it if necessary. (Please exchange both pipes and union bolts together)
Inspect air cleaner, housing, intake and exhaust piping for foreign objects such as loose bolts, nuts, cloths etc.
Replace turbocharger oil inlet and outlet gaskets with new gaskets. Do not use any form of liquid gasket.
Since sludge may flow into the turbocharger, do not perform engine clean or flush after the exchange turbocharger is fitted.
Inspect compressor wheel to confirm that the lock nut is still attached to the shaft. If the nut is missing it is essential that the intake and exhaust systems are inspected and that the missing nut is found and removed. Failure to capture the nut can cau
Foreign object damage to impeller. Please confirm whether a impeller lock nut sticks by all means. When there is not it, It is left in an air cleaner or the intake pipe and turbo failure again. It does not become the object of the claim.(Suggest to remove the ribbon when you install it)
Foreign object from oxidised exhaust manifold (such as rust flakes).
In some instances foreign objects that damaged the compressor or turbine wheels, will then cause an imbalance in the shaft. This can then cause metal contact between the bearing and the shaft if the imbalance is present and the turbocharger continues runn
Check of PCV valve movement
Be careful not to allow any foreign objects contaminate the oil inlet, piping or union bolts during installation.
In the case of an exhaust side broken ceramic wheel blade, please inspect that the broken blade piece is not left remaining in the exhaust somewhere in between the catalytic convertor and the turbocharger exhaust housing, prior to installing the new turbo
Caution:
Remove the Lock-nut from inside the air cleaner or intake pipe. (In case the turbocharger was failed by same cause, warranty claim is not accepted)
(1) Or when there is condition (2), there is the possibility that piston blow by is high. If the engine is in normal condition, blow by will be drawn into the engine because of negative pressure in the intake manifold and crank case. Therefore the turboch
Ensure air does not come out of the upper outlet of the PCV valve, even if air is carried away from the bottom of the PCV valve.
• Clean with brake parts cleaner
• Replace an inoperative PCV valve, even if it appears clean in appearance.
It is possible that the inner side of the blow by hose cover connector is blocked up with sludge.
• Confirm passage is not blocked with wire
• If partial blockage is evident, clean out foreign substances with compressed air blower.
It is possible that the PCV connector passage can block up with sludge.
• Confirm the connector passage is not blocked with wire.
• If partial blockage is evident, clean out foreign substances with compressed air blower.
Compressor wheel damage due to soft objects, such as cloth or paper can cause bends in the impeller blades, usually in a direction opposite to rotation.
Possibly due to an exhaust gas leak. Suggest replacement of related gaskets and securing all system bolts to the specified torque. This can also cause a lack of engine power or a noisy turbocharger.
Turbocharger originally has the sound with high frequency. It has different sound depends on each turbocharger; loudness and intervals. It is nessesary to listen and judge the sound is usual or not.
Please refer the example of noise
