Crankcase Ventilation (CV) System Inspection
| • | Test
for vacuum at the positive crankcase ventilation (PCV) dirty air hose (2) where
it connects to the vacuum orifice tube (5) in the camshaft cover. There should
be manifold vacuum present at the hose (2). If there is no vacuum, inspect
for a plugged hose, leaking hose or a plugged intake manifold passage. |
| • | If oil has accumulated in the air cleaner resonator (1), inspect
for the following conditions: |
| - | Plugged vacuum orifice tube (5) in the camshaft cover |
| - | Plugged, restricted, or leaking PCV dirty air hose (2) |
| - | Plugged or restricted intake manifold passage (3) |
| • | Additional items to inspect: |
| - | Plugged or restricted vacuum tube (4) in the camshaft cover |
| - | Plugged or restricted PCV fresh air hose (6) |
| - | Plugged or restricted passage in the air cleaner resonator (1) |
| - | Inspect the cam cover, the oil pan, engine front cover, and other sealing
areas for leaks |
Results of Incorrect Operation
A plugged crankcase ventilation system may contribute to the following conditions:
| • | Stalling or a slow idle speed |
| • | Oil accumulation in the air cleaner resonator (1) |
A leaking hose may contribute to the following conditions:
The crankcase ventilation system has no serviceable components so no maintenance
of the system is required.
