Lincoln Aviator: Engine System - General Information / General Procedures - Valve Stem Diameter
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. Verify the diameter is within specification.
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...
Other information:
Check
NOTE:
Car shown, trucks are similar.
Turn the ignition ON, engine OFF.
Set the parking brake on.
For automatic transmission place the selector lever in
DRIVE (D). For manual transmission place the gearshift lever in FIRST
GEAR...
Removal
NOTE:
If the catalytic converter is not being replaced, the HO2S
and the catalyst monitor sensor do not need to be removed from the
catalytic converter. Disconnecting the electrical connectors is still
necessary.
NOTE:
The exhaust Y-pipe dual catalytic converter is a 2-piece assembly...