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:
The following warning lamps and indicators
alert you to a vehicle condition that may
become serious. Some lamps illuminate
when you start your vehicle to make sure
they work. If any lamps remain on after
starting your vehicle, refer to the respective
system warning lamp for further information.
Note: Some warning indicators appear in
the information display and function the
same as a warni..
Item
Part Number
Description
1
7C0987C098
Traction motor drive gear assembly
2
7H4717H471
Transfer shaft and gear assembly
3
7F4657F465
Differential carrier and gear assembly
4
7L4377L437
Ring gear assembly
The
final drive gear is meshed with the transfer shaft and bolted to the
differential case. The ring gear bolts are one time u..