If turbocharger oil flow is restricted over longer
periods, the turbocharger
bearing system will show signs of heat discoloration
as well as polished and burnished surfaces. This type
of failure is commonly known as oil starvation.
Insufficient
oil supply can be attributed to the following:
Re-fitting a turbocharger without adequate priming.
Long
periods of non-use.
Broken or restricted oil feed pipe.
Low engine oil
pressure due to malfunctioning lubrication
system.
Low or no oil in sump.
The use of sealants can result in restricting the oil flow.
