Nissan Skyline GTR 32 turbocharger trouble diagnosis (oil leaks, smoke (white or blue smoke), lack of power, poor acceleration, abnormal noise)
 
Items to be verified before diagnosis
 
(1)  The Nissan Skyline engine oil level must be between the MIN and MAX marks on the oil level gauge.
(When higher than MAX , engine oil flows into the intake duct through the blowby gas recirculation pass and turbocharger may be determined to be malfunctioning.)
(2)  Check with customer of Nissan Skyline R32 to determine if oil is cooled when idling after driving.
If even one malfunction in the following chart is detected in a unit inspection, replace the turbocharger ASSY.
If none of these conditions are found during inspection, assume there are no turbocharger problems and search for a malfunction in another location.
 

Inspection location

 

Symptom

 

Possible associated phenomenon

Oil leak

Smoke

Abnormal noise

Lack of power or

poor acceleration

Turbine rotor

 

 

 

Turbine of Nissan Skyline has oil on rotors.

Δ

Δ

Δ

Carbon has accumulated.

Δ

Rotor scrapes against the housing.

Δ

 

The turbine vanes are bent or folded.

   

Compressor wheel

 

 

Suction inlet is dirty with oil.

   

Rotor scrapes against the housing.

Δ

The turbine vanes are bent or folded.

   

• Both turbine and
compressor

• Rotor shaft play
inspection

 

 

There is strong resistance or scraping when rotated by finger.

 

Δ

Δ

Rotation by finger is not possible.

     

There is considerable shaking between rotor shaft and turbo ASSY.

Δ

Δ

Δ

Look through oil hole. (Inspect interior with penlight.)

Carbon sludge has accumulated in waste oil hole.

Δ

Δ

Δ

Swing valve motion. (Use air gun or air pump.)

The valve does not move smoothly when pressure is applied gradually. (The valve normally opens at pressure greater than [59 to 69 kPa (0.6 to 0.7 kg/cm2, 9 to 10 psi)].

     

 
[●: Highly possible    ○: Possible   Δ: Slightly possible]