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Diagnosis and Testing|Removal and Installation > < Engine Emission Control

Mondeo 2007.5 (02.2007-)

Engine Emission Control - 1.6L Duratec-16V Ti-VCT (Sigma) - Engine Emission Control Mondeo 2007.5 (02/2007-)
Diagnosis and Testing

Inspection and Verification

  1. Verify the customer concern.
  1. Visually inspect for obvious signs of mechanical damage.

Visual Inspection Chart

Mechanical
  • Hose(s)/hose joints
  • Gasket(s)
  • Positive crankcase ventilation (PCV) valve
  • Crankcase vent oil separator
  1. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
  1. If the cause is not visually evident, verify the symptom and refer to the Symptom Chart.

Symptom Chart

Symptom Possible Sources Action
Excessive crankcase pressure
*
Blocked PCV valve.
*
Blocked crankcase vent oil separator.
*
Blocked PCV hose.
*
CLEAN or INSTALL new PCV components as necessary. TEST the system for normal operation.
*
Worn or damaged engine components.
Oil in the air intake system
*
Restriction in the crankcase vent oil separator.
*
CLEAN or INSTALL a new crankcase vent oil separator.
REFER to: Crankcase Vent Oil Separator (303-08 Engine Emission Control - 1.6L Duratec-16V Ti-VCT (Sigma), Removal and Installation).
TEST the system for normal operation.
*
PCV valve permanently open.
*
INSTALL a new PCV valve. TEST the system for normal operation.
*
Excessive crankcase pressure
*
Worn or damaged engine components.

Diagnosis and Testing|Removal and Installation > < Engine Emission Control