LEMON Manuals: Even more car manuals for everyone
Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 36 (Engine Mechanical - 6.6L - Introduction) >> Diagnostic Information and Procedures >> Crankcase Ventilation System Inspection/Diagnosis

Crankcase Ventilation System Inspection/Diagnosis

WARNING: This page is about a different variant/trim than selected.
Crankcase Ventilation System Inspection/Diagnosis

Concern Action
IMPORTANT: Oil in the charged air cooler, hoses, turbocharger, or intake manifolds is normal with a closed crankcase ventilation system.
The maximum crankcase pressure is 4 kPa or 16 in of water at 3, 100 RPM measured at the oil level indicator tube.
PVC check valve stuck closed
  • Excessive crankcase pressure
  • Possible oil leaks. Replace the valve.
Odors Normal situation
Noise Cracked hoses
Smoke Damaged PCV diaphragm
Excessive Oil Consumption Damaged PCV diaphragm, missing or broken spring
scientia non olet · About LEMON Manuals