C.Replacement of Turbo Charger

If the fault tracing procedure has revealed that the turbo charger is defective and must be replaced, the following must be observed:

1. Compare the maintenance record, accumulated mileage, and the actual condition of the turbo. If the vehicle has had scheduled maintenance performed and a sludging condition exists, include copies of the servicing invoices for review when submitting the part to Warranty Parts Testing. If a genuinely poor service record confirms actual inspection results, the repair may not be subject to warranty consideration. Unusual situations with low accumulated mileage during the new vehicle warranty period should be reviewed with your RSM.

2. To determine if the lack of proper servicing is the cause, remove the turbo unit from the engine and thoroughly examine the inlet and outlets ports in the center housing of the turbo unit.
3. If you have found excessive axial and/or radial play in the turbo shaft and no evidence of sludge buildup in the lubrication system, hot shut down is likely to be the reason for the bearing damage. Review the instructions given in the Owners Manual with the customer. See turbo caution on next page.

NOTE: - Abnormal radial play will cause the compressor wheel to touch the housing.
Turbo caution

Never race the engine immediately after starting. Oil flow may not reach some lubricating points fast enough to prevent engine damage. Before switching off the engine,let it operate at idle for a short time to allow the spinning of the turbo-compressor's turbine vanes to slow. After hard driving, this idle time should last a couple of minutes, during which the vanes will slow and the compressor will cool down while still receiving lubrication, If the turbine vanes are spinning at high speeds when the engine is switched off, there is a great risk of heat damage and/or turbine seizure due to lack of lubrication. Do not race the engine just prior to switching off!


4 To avoid repeat failures, follow the cleaning instructions of the oil delivery and
return lines carefully and fill the turbo charger bearing housing with engine oil. Do not use sealers when repairing the engine. If a sealant is used, it may enter the lubrication system and restrict the oil lines to the turbo charger.

5. A turbo replacement, because of bearing failure, must always be followed by oil and filter change.