Lincoln Navigator: Engine - 3.5L EcoBoost (272kW/370PS) / Piston. Disassembly and Assembly of Subassemblies
DISASSEMBLY
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Remove the piston rings and discard.
-
-
Remove the piston pin retainers and discard.
-
NOTE:
If the piston and connecting rod are to be
reinstalled, they must be assembled in the same orientation. Mark the
piston orientation to the connecting rod for reassembly.
Remove the piston from the connecting rod.
-
Inspect the piston and connecting rod.
Refer to: Piston Inspection (303-00 Engine System - General Information, General Procedures).
ASSEMBLY
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If the piston and/or connecting rod are being installed
new, the piston rod orientation marks and the arrow on the top of the
dome of the piston should be facing toward the front of the engine
block.
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Install the piston to the connecting rod.
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Lubricate with clean engine oil and install the piston pin.
Refer to: Specifications (303-01C)
.
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NOTE:
The piston pin retaining clip gap orientation must be toward the top or dome of piston.
Install the piston pin retainers.
-
Inspect the lower compression ring to identify the
orientation. The top of the lower compression ring will be angled at the
top and notched on the bottom.
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Top Side.
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Lubricate with clean engine oil and install the piston rings.
Refer to: Specifications (303-01C)
.
-
NOTE:
The piston compression upper ring should be
installed with the "O" mark on the ring face pointing up toward the top
of the piston.
NOTE:
The arrow on the top of the piston indicates the front of the engine.
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Center line of the piston parallel to the wrist pin bore.
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Upper compression ring gap location.
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Upper oil control segment ring gap location.
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Lower oil control segment ring gap location.
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Lower compression ring gap location.
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Spacer oil control ring gap location.
Special Tool(s) /
General Equipment
100-002
(TOOL-4201-C)
Holding Fixture with Dial Indicator Gauge
205-142
(T80T-4000-J)
Installer, Differential Bearing Cone
205-149
(T80T-4000-R)
Installer, Spindle Bearing
205-153
(T80T-4000-W)
Handle
303-102Installer, Crankshaft Pulley
303-1246Engine Spreader BarTKIT-2006UF-FLMTK..
Other information:
Special Tool(s) /
General Equipment
Feeler Gauge
Check
NOTE:
Refer to the appropriate Section 303-01 for the specification.
NOTE:
Use a Straightedge that is calibrated by the
manufacturer to be flat within 0.005 mm (0.0002 in) per running foot of
length, such as Snap-On® GA438A or equivalent. For example, if the
Straightedge is 61 cm (24 in) long,..
System Operation
Overview - Active Park Assist
NOTE:
Vehicles equipped with active park assist use a different parking aid
sensor. The IPMA supplies a 12v reference voltage and a ground. The
signal circuit is a LIN used to comunicate the sensor data with the IPMA
.
The
active park assist system is a supplementary parking system that
assists the operator with the task of pa..