Blue Bird Coachworks 450 LXi, Owner'S Manual

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5-3 Engine Maintenance
450 LXi Owner Manual
~ 5-3-28 ~
Rev. “C”
5-3.34 Engine Oil and Filter - Change
Do not drain the engine oil when the engine is cold. As the engine oil cools, suspended waste particles settle on the bottom
of the engine oil pan. The waste particles are not removed with the draining cold engine oil. Drain the crankcase while the
engine is stopped. Drain the crankcase while the engine oil is warm. This draining method allows the waste particles that are
suspended in the engine oil to be drained properly.
Failure to follow this recommended procedure will cause the waste particles to be recirculated through the engine lubrication
system with the new engine oil.
5-3.34.1 Drain the Engine Oil
After the engine has been run at the normal operating temperature, stop the engine. Use one of the following methods to
drain the engine crankcase oil.
If the engine is equipped with a drain valve, turn the drain valve knob counterclockwise in order to drain the engine
oil. After the engine oil has drained, turn the drain valve knob clockwise in order to close the drain valve.
If the engine is not equipped with a drain valve, remove the oil drain plug in order to allow the engine oil to drain. If
the engine is equipped with a shallow sump, remove the bottom oil drain plugs from both ends of the engine oil pan.
After the engine oil has drained, the oil drain plugs should be cleaned and installed. Tighten the oil drain plugs to the proper
torque. Refer to the
Specifi cations Module “Engine Oil Pan”
topic for additional information.
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WARNING!!
Hot oil and hot components can cause personal injury. Do not allow hot oil or hot components
to contact the skin.
WARNING!!
Hot oil and hot components can cause personal injury. Do not allow hot oil or hot components
to contact the skin.
NOTICE: The vehicle must be parked on a level surface for this maintenance procedure.