Ecd System (W/ Egr Cooler) Turbocharger Oil Leak And White Smoke

DESCRIPTION

INSPECTION PROCEDURE

CHECK TYPE OF OIL LEAK

REPLACE THE PART WHICH IS LEAKING OIL

CHECK WHITE SMOKE

INSPECT COMPRESSOR INLET

INSPECT COMPRESSOR OUTLET

INSPECT TURBINE INLET

INSPECT TURBINE OUTLET

REPLACE TURBOCHARGER SUB-ASSEMBLY

CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

DESCRIPTION

HINT:

1. Turbocharger oil leaks are classified into 2 types. One is an internal oil leak, and the other is an external oil leak.
   
2. When oil leaks and smoke occur, sometimes the turbocharger is mistakenly replaced, even though the turbocharger is not the cause of the problem.
   
3. When there are oil marks on the surface of the compressor housing, or oil in the compressor inlet or outlet, the problem may mistakenly be determined to be a turbocharger oil leak.
   
4. Each part of the turbocharger is shown below.
   

HINT:

1. Above illustration is an example.
   
2. If the oil stain is similar to the one shown in the illustration (fig. 1), it may be oil spray from parts surrounding the turbocharger or oil leaking from the air cleaner hose. Therefore, this kind of oil stain on the outer surface of the turbocharger is not an oil leak from the turbocharger (external oil leak), and is not related to white smoke. For identification of an actual turbocharger outer oil leak, check only the sealing part shown below.
   

HINT:

1. Above illustration is an example.
   
2. A certain amount of oil is contained in the intake system because blow-by gas containing oil mist is returned to the intake system by the PCV. Therefore, the oil amount at the compressor inlet shown in the left figure (fig. 2) is normal and not an oil leak from the turbocharger (internal oil leak). Also, oil at the compressor outlet as shown in fig. 3 is normal.
   In addition, the compressor impeller surface may blacken due to blow-by gas but this is not abnormal.
   

HINT:

1. Above illustration is an example.
   
2. This is an illustration (fig. 4) of an air leak test performed by applying soapy water to the area of the leak. Bubbles indicate the leak point.
   

HINT:

1. Oil coking is caused by insufficient oil maintenance.
   
2. If the oil drain is clogged by coked oil, oil cannot be drained smoothly, and it overflows from the bearing housing to the compressor housing and turbine housing. This results in a large amount of white smoke from the exhaust pipe.
   If any solid (coked oil) is visually confirmed inside the bearing housing, it can be assumed to be the cause of internal oil leak.
   

HINT:

Above illustration is an example.

HINT:

Above illustration is an example.

HINT:

Above illustration is an example.

INSPECTION PROCEDURE

NOTICE:

1. Inspect the fuses of circuits related to this system before performing the following inspection procedure.
   
2. After replacing the ECM, the new ECM needs registration (HILUX_TGN26 RM0000012XK071X.html) and initialization (HILUX_TGN26 RM000000TIN04FX.html).
   
3. After replacing the fuel supply pump assembly, the ECM needs initialization (HILUX_TGN26 RM000000TIN04FX.html).
   
4. After replacing an injector assembly, the ECM needs registration (HILUX_TGN26 RM0000012XK071X.html).
   

1. Check whether the oil leak is an internal or external oil leak.
   
   

   HINT:

   White smoke is not related to an external oil leak.

   
   

   Oil Leak Type	Description
   Internal oil leak (White smoke)	Oil leak from bearing housing to compressor housing (intake side) or turbine housing (exhaust side) through seal rings. Internal oil leak is not visible from outside of turbocharger. If oil leak occurs from turbine side seal, large amount of white smoke will be emitted from exhaust pipe.
   External oil leak	Oil leak from inside of turbocharger to outside of turbocharger (e.g. from FIPG seal, oil pipe flange or oil pipe union). Includes oil leaks visible from outside of turbocharger.

   
   

   Result

   Result	Proceed to
   External oil leak	A
   Internal oil leak	B

1. Replace the part which is leaking oil.
   

1. Fully depress the accelerator pedal, and then release it.
   

2. Check whether white smoke is emitted or not when racing the engine.
   

   Text in Illustration

   *a

   Example

   CAUTION:

   Be sure not to check for white smoke indoors.

   
   

   Result

   Result	Proceed to
   White smoke is emitted	A
   White smoke is not emitted	B

   HINT:

   1. If white smoke appears for only a short period of time immediately after the engine is started, the white smoke is not from the turbocharger.
      
   2. If the turbocharger is the cause of the problem, regardless of whether the engine is cold or warmed up, there will be a large amount of white smoke to the extent that visibility is obstructed for a few meters in the area of the smoke (as shown in the illustration).
      
   3. Depending on whether there is oil mixed with the fuel, or whether there is unburned fuel present, the smell of the exhaust gas differs. When oil is mixed in, the exhaust gas smells like burning oil.
      

1. Remove the air cleaner hose from the compressor inlet.
   

2. Check whether an excessive amount of oil is present or not, and whether excessive oil deposits are attached to the compressor impeller or not.
   

   HINT:

   1. A certain amount of oil may be present as shown in fig. 2 in "Description", because a certain amount of oil mist is contained in the PCV gas and this oil accumulates just before the compressor inlet.
      
   2. If an excessive amount of oil is present at the compressor inlet, there may be a problem in the PCV system.
      

3. Reinstall the air cleaner hose.
   

1. Remove the air hose from the compressor outlet.
   

2. Check whether or not an excessive amount of oil or excessive oil deposits are present at the compressor outlet.
   

   HINT:

   A certain amount of oil may be present as shown in fig. 3 in "Description", because a certain amount of oil mist is contained in the PCV gas.

   
   

   Result

   Result	Proceed to
   Excessive amount of oil present at both compressor inlet and outlet	A
   Excessive amount of oil present only at compressor outlet	B
   Excessive amount of oil not present at compressor inlet or outlet	C

3. Reinstall the air hose.
   

1. Remove the turbocharger from the engine.
   

2. Check whether an excessive amount of wet oil or excessive oil deposits are present at the turbine inlet.
   

   HINT:

   Be sure not to mistake carbon soot for oil.

1. Check whether an excessive amount of wet oil or excessive oil deposits are present at the turbine outlet.
   

   HINT:

   1. Be sure not to mistake carbon soot for oil.
      
   2. If the turbocharger shaft is tilted, some amount of oil will flow out from the bearing housing. Therefore, be sure not to mistake oil that flowed out from the bearing housing during or after the removal of the turbocharger for oil that was present before the removal of the turbocharger.
      
   3. If an excessive amount of oil or excessive oil deposits are present at the turbine inlet, this oil is coming from the exhaust port of the cylinders, and may indicate a problem in 1 or more cylinders.
      
   
   

   Result

   Result	Proceed to
   Excessive amount of oil present at both turbine inlet and outlet	A
   Excessive amount of oil present only at turbine outlet	B

1. Replace the turbocharger sub-assembly (HILUX_TGN26 RM000001442016X.html).