Crankcase Ventilation System Description
The compressed combustion gas which escapes past the piston rings into the crankcase is known as blow-by gas. Blow-by gas contains large amounts of carbon monoxide (CO) and hydrocarbon. The positive crankcase ventilation system prevents the blow-by gas from being emitted into the atmosphere. The positive crankcase ventilation system routes the crankcase blow-by gas back into the intake system where the blow-by gas becomes part of the combustion process.
Results of Incorrect Operation
A plugged oil separator or hose may cause any of the following conditions:
| • | Engine stalling or low engine idle speed |
| • | High engine crankcase pressure |
| • | Engine oil in the air cleaner |
| • | Oil sludge in the engine |
| • | Excessive exhaust emissions |
A faulty separator or hose may cause any of the following conditions:
| • | Incorrect engine crankcase pressure |
| • | Excessive exhaust emissions |
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