Ford Explorer: 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:
Acceptable Noise, Vibration and Harshness (NVH)
Noise is any undesirable sound, usually unpleasant in nature. Vibration
is any motion, shaking or trembling, that can be felt or seen when an
object moves back and forth or up and down. Harshness is a ride quality
issue where the vehicle's response to the road transmits sharply to the
customer...
Special Tool(s) /
General Equipment
100-001
(T50T-100-A)
Slide Hammer
Materials
Name
Specification
Motorcraft® Threadlock and SealerTA-25-B
-
Repair
All core plugs
NOTE:
Cylinder block core plug shown, cylinder head core plug similar...
Categories
4 Inch Display

A - Tachometer.
B - Information display.
C - Speedometer.
D - Fuel gauge.
E - Engine coolant temperature gauge.
read more