LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1043 (Engine Mechanical - 4.8L, 5.3L & 6.0L (Introduction)) >> Diagnostic Information and Procedures >> Crankcase Ventilation System Inspection/Diagnosis

Crankcase Ventilation System Inspection/Diagnosis

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
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
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
Stalling or slow idle speed Inspect for any of the following conditions:
  • Restricted or kinked engine vent hose
  • Leaking (damaged) PCV hose
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
scientia non olet · About LEMON Manuals