Lincoln Aviator: Engine System - General Information / General Procedures - Valve Guide Inner Diameter
Check
NOTE:
Refer to the appropriate Section 303-01 for the specification.
-
NOTE:
Valve guides tend to wear in an hourglass pattern.
The ball gauge can be inserted into the combustion chamber side of the
valve guide, if necessary.
-
Use a ball gauge to determine the inside diameter of
the valve guides in 2 directions at the top, middle and bottom of the
valve guide.
-
Measure the ball gauge with a micrometer.
-
If the valve guide is not within specifications, install a new cylinder head assembly.
Inspection
NOTE:
Dropped spark plugs should always be discarded.
Unfired
An unfired spark plug should appear very clean
with a pure nickel finish to the threads and ground strap...
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:
System Operation
Active Park Assist
System Diagram
Item
Description
1
PCM
2
with 14 or 28 speaker system
3
GWM
4
TRM
5
APIM
6
Audio system display
7
SCCM
8
PSCM
9
ATCM
10
ABS module
11
BCM
12
ACM
13
IPC
14
DSP
15
Rear door speakers
16
Front door speakers
17
IPMB
18
Right front active sensor
19
Left front active sensor
20
Right rear active sensor
21
Left rear active sensor
22
PAM
Network Message Chart
IPMB Network Input Messages
Broadcast Message
Originating Module
Message Purpose
ABS active
ABS module
Disables the active park assist if an ABS activation occurs...
Special Tool(s) /
General Equipment
Interior Trim Remover
Removal
NOTE:
Removal steps in this procedure may contain installation details.
Depower the SRS.
Refer to: Supplemental Restraint System (SRS) Depowering (501-20B Supplemental Restraint System, General Procedures)...
Categories
The front outboard and rear safety restraints
in the vehicle are combination lap and
shoulder belts.
Insert the belt tongue into the proper
buckle (the buckle closest to the direction
the tongue is coming from) until you hear
a snap and feel it latch. Make sure that
you securely fasten the tongue in the
buckle.

To unfasten, press the release button
and remove the tongue from the buckle.
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