A crankcase ventilation system is used in order to provide a more complete scavenging of crankcase vapors. The air cleaner supplies fresh air (1) through a filter to the crankcase.
The crankcase mixes the fresh air with blow-by gases. This mixture then passes through an orifice in the cylinder head gasket and to a pipe located in the intake manifold.
The crankcase ventilation system has no serviceable components so no maintenance of the system is required.
Symptom  | Correction  | ||||||
|---|---|---|---|---|---|---|---|
External Oil Leak  | Inspect for any of the following conditions: 
 
 
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Rough Idle  | Inspect for any of the following conditions: 
 
 
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Stalling or Slow Idle Speed  | Inspect for any of the following conditions: 
 
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High Idle Speed  | Inspect for a leaking (damaged) PCV hose  | ||||||
Sludge In the Engine  | Inspect for restricted or kinked PCV hose or engine vent hose  |