Lincoln Corsair: 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.
-
Check for damaged or severely worn parts and correct assembly.
Valve Train Analysis - Camshaft Lobe Lift
-
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).
-
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.
-
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.
-
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).
-
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.
-
If the lift on any lobe is below specified service
limits, install a new camshaft and camshaft roller followers or valve
tappets.
-
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).
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...
Other information:
Use oil and fluid that meets the defined
specification and viscosity grade.
If you do not use oil and fluid that meets the
defined specification and viscosity grade, it
could result in:
Component damage that your vehicle
warranty does not cover.
Longer engine cranking periods.
Increased emission levels.
Reduced engine performance.
Reduced fuel economy.
Reduced brake performance.
Air C..
Special Tool(s) /
General Equipment
Electric Drill
Removal
NOTE:
Driver seat shown, passenger seat similar.
NOTE:
Positioning the seat fully upward provides access to
service the seat track motor with the seat in the vehicle.
Move the front seat to the full upward position.
Depower the SRS .
Refer to: Supplemental Restraint System (SR..