Lincoln Navigator: Engine System - General Information / Connecting Rod Bearing Journal Clearance. General Procedures
Check
NOTE:
Refer to the appropriate Section 303-01 for the specification.
-
NOTE:
The crankshaft connecting rod journals must be
within specifications to check the connecting rod bearing journal
clearance.
Remove the connecting rod bearing cap and connecting rod bearing.
-
Position a piece of Plastigage across the bearing surface.
-
NOTE:
Do not turn the crankshaft during this step.
Install and tighten to specifications, then remove the connecting rod bearing cap.
-
Measure the Plastigage to get the connecting rod bearing
journal clearance. The Plastigage should be smooth and flat. A changing
width indicates a tapered or damaged connecting rod or connecting rod
bearing.
Make sure the oil in the crankcase is of the correct
viscosity and at the correct level and that the battery is correctly
charged. Operate the vehicle until the engine is at normal operating
temperature...
Check
NOTE:
Refer to the appropriate Section 303-01 for the specification.
NOTE:
Crankshaft main bearing journals must be within specifications before checking journal clearance...
Other information:
Materials
Name
Specification
Motorcraft® High Performance Engine RTV SiliconeTA-357
WSE-M4G323-A6
Engine Oil - SAE 5W-30 - Synthetic Blend Motor OilXO-5W30-Q1SP
WSS-M2C946-B1
Removal
NOTICE:
During engine repair procedures, cleanliness is extremely
important...
Removal
WARNING:
The following procedure prescribes critical repair steps
required for correct restraint system operation during a crash. Follow
all notes and steps carefully. Failure to follow step instructions may
result in incorrect operation of the restraint system and increases the
risk of serious personal injury or death in a crash...