Crankcase Ventilation System Inspection_Diagnosis (1)

Engine Mechanical - 5.3L L84 or 6.2L L87 | Diagnostic Information and Procedures | Document ID: 5027432 Crankcase Ventilation System Inspection/Diagnosis Crankcase Ventilation System Inspection/Diagnosis

Symptom	Correction
External oil leak	Inspect for any of the following conditions: Restricted or kinked PCV hose or engine vent hose Damaged, incorrect, or incorrectly installed PCV hose Excessive crankcase pressure Restricted or blocked PCV valve
Rough Idle	Inspect for any of the following conditions: Restricted or kinked PCV hose or engine vent hose Leaking (damaged) PCV hose Vacuum hoses worn or not properly installed PCV valve leaking or stuck open
Stalling or slow idle speed	Inspect for any of the following conditions: Restricted or kinked engine vent hose Leaking (damaged) PCV hose Restricted or blocked PCV valve
High idle speed	Inspect for the following conditions: Inspect for a leaking (damaged) PCV hose PCV valve leaking or stuck open PCV tube from PCV valve to intake manifold disconnected
Sludge in the engine	Inspect for restricted or kinked PCV hose or engine vent hose