Lincoln Corsair Manuals

Lincoln Corsair: Engine System - General Information / General Procedures - Valve Train Analysis

Lincoln Corsair 2020-2024 Service Manual / Powertrain / Engine / Engine System - General Information / General Procedures - Valve Train Analysis

Valve Train Analysis - Engine Off, Valve Cover Removed

NOTE: The following component inspections are used to diagnose valve train concerns.

  1. Check for damaged or severely worn parts and correct assembly.

Valve Train Analysis - Camshaft Lobe Lift

  1. Remove the spark plugs.
    For additional information, refer to: Spark Plugs (303-07A Engine Ignition - 2.0L EcoBoost (177kW/240PS) – MI4/2.0L EcoBoost (184kW/250PS) – MI4, Removal and Installation).
    For additional information, refer to: Spark Plugs (303-07B Engine Ignition - 2.3L EcoBoost (199kW/270PS), Removal and Installation).
    For additional information, refer to: Spark Plugs (303-07C Engine Ignition - 2.5L Duratec – Hybrid (121kW/164PS) (BG), Removal and Installation).
  1. Install the Dial Indicator Gauge with Holding Fixture so the rounded tip of the dial indicator is on top of the camshaft lobe and on the same plane as the valve tappet.
  1. Rotate the crankshaft using a breaker bar and socket attached to the crankshaft pulley retainer bolt. Rotate the crankshaft until the base circle of the camshaft lobe is reached.
  1. Zero the dial indicator. Continue to rotate the crankshaft until the high-lift point of the camshaft lobe is in the fully raised position (highest indicator reading).
  1. To check the accuracy of the original dial indicator reading, continue to rotate crankshaft until the base circle is reached. The indicator reading should be zero. If zero reading is not obtained, repeat Steps 2 through 5.
  1. If the lift on any lobe is below specified service limits, install a new camshaft and camshaft roller followers or valve tappets.
  1. Install the spark plugs.
    For additional information, refer to: Spark Plugs (303-07A Engine Ignition - 2.0L EcoBoost (177kW/240PS) – MI4/2.0L EcoBoost (184kW/250PS) – MI4, Removal and Installation).
    For additional information, refer to: Spark Plugs (303-07B Engine Ignition - 2.3L EcoBoost (199kW/270PS), Removal and Installation).
    For additional information, refer to: Spark Plugs (303-07C Engine Ignition - 2.5L Duratec – Hybrid (121kW/164PS) (BG), Removal and Installation).

    General Procedures - Valve Stem Diameter

    Check NOTE: Refer to the appropriate Section 303-01 for the specification. Measure the diameter of each intake and exhaust valve stem at the points shown...

    Engine - 2.0L EcoBoost (177kW/240PS) – MI4

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    WARNING: Driving while distracted can result in loss of vehicle control, crash and injury. We strongly recommend that you use extreme caution when using any device that may take your focus off the road. Your primary responsibility is the safe operation of your vehicle. We recommend against the use of any hand-held device while driving and encourage the use of voice-operated systems when possible. Make sure you are aware of all applicable local laws that may affect the use of electronic devices while driving.

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