Turbocharger Oil Leak and White Smoke [11/2021 - ]: Procedure

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

   HINT: 

   White smoke is unrelated to external oil leaks.

   Type of Oil Leak	Outline
   Internal oil leak (white smoke)	An internal oil leak from the bearing housing into the compressor housing (intake side) or turbine housing (exhaust side) through the seal ring cannot be seen from outside the turbocharger. If an oil leak occurs from the turbine seal, a large amount of white smoke is emitted from the exhaust pipe.
   External oil leak	Oil leak from inside to outside the turbocharger. (Example: FIPG seal, oil pipe flange, or oil pipe union) Includes oil leaks that are visible outside the turbocharger.

   Result

   Result	Proceed to
   External oil leak	A
   Internal oil leak	B

Result: 

B 

See step  3

Result: 

A 

See step  2

1. Replace the turbocharger sub-assembly.

   HINT: 

   • If oil leaks from the contact surface between the compressor housing and seal plate, the seal is defective. Replace the turbocharger sub-assembly.
   • If oil leaks from the contact surface between the bearing housing and seal plate, the seal is defective. Replace the turbocharger sub-assembly.
   • If oil leaks from the contact surface between the compressor inlet elbow or the compressor outlet elbow and the compressor housing, the installation may be incorrect due to loose nuts or a defective gasket. Check the installation or replace the gasket.

   Result

   Proceed to
   NEXT

Result: 

NEXT 

END 

1. Remove the compressor inlet elbow from the compressor housing.
2. Check for excessive oil or oil deposits at the compressor inlet.

   HINT: 

   • The PCV gas contains a certain amount of oil mist. This can accumulate in front of the compressor inlet, creating a certain amount of oil, as shown in Illustration 2.
   • Excessive oil at the compressor inlet may cause a malfunction in the PCV system.
   • A certain amount of oil on the compressor housing surface results from oil mist in the blow-by gas and is not a malfunction.
3. Remove the compressor outlet elbow from the compressor housing.
4. Check for excessive oil or oil deposits at the compressor outlet.

   HINT: 

   The PCV gas contains a certain amount of oil mist. This can create a certain amount of oil, as shown in Illustration 3.

5. Remove the converter with catalyst assembly.
6. Check for excessive oil or oil deposits in the turbine housing.

   HINT: 

   • Do not mistake carbon soot for oil.
   • If the turbocharger shaft is tilted, a small amount of oil flows out of the bearing housing. Do not mistake oil that flows out of the bearing housing during and after removal of the turbocharger sub-assembly for oil that existed before the turbocharger assembly was removed.
   • Excessive oil or oil deposits in the turbine inlet comes from a cylinder exhaust port and may indicate a problem with one or more cylinders.

   Result

   Result	Proceed to
   No excessive oil in the compressor inlet or outlet or the turbine housing	A
   Excessive oil in the compressor inlet or outlet	B
   Excessive oil in the turbine housing	C

Result: 

A 

END (CAUSE CHECK EXCEPT THE TURBO CHARGER) 

Result: 

C 

See step  5

Result: 

B 

See step  4

1. Check for damage to the compressor impeller.
2. Check for interference between the compressor impeller and the compressor housing.

   Result

   Result	Proceed to
   No damage or interference	A
   Damage or interference exists	B

Result: 

A 

See step  6

Result: 

B 

REPLACE TURBOCHARGER SUB-ASSEMBLY. Refer to  REMOVAL [11/2021 - ] 

1. Check for damage to the turbine wheel.
2. Check for interference between the turbine wheel and the turbine housing.

   HINT: 

   If interference exists between the turbine wheel and turbine housing, replace the turbocharger sub-assembly.

   Result

   Result	Proceed to
   The turbine wheel is not damaged and there is no interference between the turbine wheel and turbine housing	A
   turbine wheel is damaged (there is no interference between the turbine wheel and turbine housing)	B
   There is interference between the turbine wheel and turbine housing

Result: 

B 

REPLACE TURBOCHARGER SUB-ASSEMBLY. Refer to  REMOVAL [11/2021 - ] 

Result: 

A 

See step  6

1. Check that the turbine shaft rotates smoothly, without catching.

   Refer to ON-VEHICLE INSPECTION [11/2021 - ]

2. Check for loose turbine mounting nuts and for axial play in the turbine shaft.

   Refer to INSPECTION [11/2021 - ]

   HINT: 

   If the turbine shaft catches or if there no play or excessive play, it could indicate a seal problem due to seizing or poor sliding due to a deposit build up.

   Standard value

   0.10 mm (0.00394 in.) or less

   Result

   Result	Proceed to
   No turbine shaft malfunction	A
   Turbine shaft malfunction	B

Result: 

B 

REPLACE TURBOCHARGER SUB-ASSEMBLY. Refer to  REMOVAL [11/2021 - ] 

Result: 

A 

See step  7

1. Remove the No. 1 turbo oil pipe.
2. Check for blockage of the No. 1 turbo oil pipe due to accumulated deposits or deformation.

   HINT: 

   If no malfunction exists in the No. 1 turbo oil pipe, there may be a seal defect due to oil coking in the bearing housing.

   Result

   Result	Proceed to
   No clogging	A
   Clogging	B

Result: 

A 

REPLACE TURBOCHARGER SUB-ASSEMBLY. Refer to  REMOVAL [11/2021 - ] 

Result: 

B 

REPLACE NO. 1 TURBO OIL PIPE. Refer to  REMOVAL [11/2021 - ]