Lincoln Aviator: Engine System - General Information / General Procedures - Valve Guide Inner Diameter
Check
NOTE:
Refer to the appropriate Section 303-01 for the specification.
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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.
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Measure the ball gauge with a micrometer.
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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:
WARNING: Tires degrade over
time depending on many factors such
as weather, storage conditions, and
conditions of use (load, speed, inflation
pressure) the tires experience
throughout their lives.
In general, tires should be replaced
after six years regardless of tread
wear...
System Operation
System Diagram
Item
Description
1
BCM
2
IPC
3
Passive Key
4
RTM
5
GWM
6
GWM
7
PATS Center Antenna
8
Keyless Entry Rear Antenna
9
Ignition Switch
10
Front Door Keyless Entry Antenna(s)
11
PATS Enable
12
PCM
13
ABS
14
SOBDMC
15
Hybrid Vehicles
Network Message Chart
BCM Network Input Messages
Broadcast Message
Originating Module
Message Purpose
PATS start request target data
PCM
The PCM sends the BCM and the ABS module a challenge request for a valid ID...