TURBOCHARGER AND OIL LINES REPLACEMENT - CONTINUED
INSPECTION - CONTINUED
Turbine Wheel and Turbine Housing Inspection
Remove air piping from turbine housing (17). Refer to Removal in this work package.
Inspect turbine wheel (18) for damage by a foreign object. If there is damage, determine source of foreign object.
Clean turbine wheel (18) and turbine housing (17) if
you find buildup of carbon or foreign material.
Turn rotating assembly by hand. While turning, push
sideways. Assembly should turn freely. Turbine wheel
(18) should not rub turbine housing (17). Replace tur-
bocharger if turbine wheel rubs turbine housing.
Inspect turbine wheel (18) and turbine housing (17)
for oil leakage and oil coking. Some oil coking may be
cleaned. Heavy oil carbon build-up may require
replacement of turbocharger. If oil is coming from tur-
bocharger center housing go to step 5a. Otherwise,
proceed to Wastegate Inspection in this work package.
Remove oil drain tube. Inspect oil drain hole and oil drain tube for oil sludge. Inspect area between bearings of
rotating assembly shaft. If necessary, clean rotating assembly shaft, oil drain hole, and oil drain tube.
If crankcase pressure is high, or if oil drain is restricted, pressure in center housing may be greater than pressure of
turbine housing. Oil flow may be forced in wrong direction and oil may not drain. Check crankcase pressure and
correct any problems.
If oil drain tube is damaged, replace oil drain tube.
Check routing of oil drain tube. Eliminate any sharp restrictive bends. Make sure that oil drain tube is not too close
If steps 5a thru 5d did not reveal source of oil leakage, turbocharger has internal damage. Replace turbocharger.