Ford TRADER Workshop Manual page 121

INSPECTION
I REPAIR
B
~'-;I----""""'III
V
LENGTH
9TGOB2·194
VALVE STEM
CLEARANCE
9TGOB2·195
3. Measure the length of each valve at the paints shown.
Length
mm (in)
Standard Minimum
HA
IN
114.6 (4.512)
114.1 (4.492)
EX
114.6 (4.512) 114.1 (4.492)
SL
IN
114.6 (4.512)
114.1 (4.492)
EX
114.5 (4.508) 114.0 (4.488)
TF
IN
119.7 (4.713) 119.2 (4.693)
EX
119.3 (4.697)
118.8 (4.677)
4. Measure the stem diameter of each valve.
Diameter
mm (in)
HA
IN
8.955-8.980 (0.3526-0.3535)
EX
8.935-8.960 (0.3518-0.3528)
SL
IN
8.965-8.980 (0.3530-0.3535)
TF
EX
8.945-8.960 (0.3522-0.3528)
5. Measure the inner diameter of each valve guide at
the points
shown.
Inner diameter
. IN: 9.018-9.033mm (0.3550-0.3556 in)
EX: 9.018-9.033mm (0.3550-0.3556 in)
6. Subtract the outer diameter of the valve stem from the in-
ner diameter of the corresponding valve guide to calculate
the valve stem to guide clearance.
Clearance
mm (in)
Standard Maximum
HA
IN
0.038-0.078 (0.0015-0.0031)
EX
. 0.058-0.098 (0.0023-0.0039)
0.127 (0.0050)
SL
IN
0.038-0.068 (0.0015-0.0027)
TF
EX
0.058-0.088 (0.0023-0.0035)
7. If the clearance exceeds specification. replace the valve
and/or valve guide.
Valve Seat
1. Inspect the contact surface of each valve seat and valve
face for the following.
(1) Roughness.
(2) Damage.
2. If necessary. resurface the valve seat with a
45° (IN) or
30° (EX)
valve seat cutter and/or resurface the valve face.
3. Apply a thin coat of Prussian blue to the valve face.
4. Inspect the valve seating by pressing the valve against the
seat.
(1) If blue does not appear 360 0 around the valve face. re-
place the valve.
(2) If blue does not appear 360 0 around the valve seat,
resurface the seat.
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