Ford Transit 2002 Owner's Manual page 501

The crankcase ventilation valve is located on the top of the cylinder head cover. To ensure
optimal engine performance, this valve and all PCV hoses must be free of contaminants at
all times.
Oil Sump
The oil pan is made of steel. It is sealed using silcone based sealant (WSE-M4G-323-A6).
CAUTIONS:
When removing the engine front mount, do not place a workshop jack under the oil
pan to support the engine.
Support the engine and transmission on wooden blocks on the subframe/oil pan
flange, so that the oil pan is not under load.
The oil pan will be pushed in if the engine is supported on a workshop jack. This can cause
the oil supply to the oil intake pipe to be obstructed.
The oil drain plug is provided with an O-ring seal, and can be re-used many times.
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