Ford Thunderbird Manual page 98

03-01 A-59
ADJUSTMENTS
Valve Clearance
1 . With No. 1 piston (6 1 08) on the top dead center
(TDC) at the end of compression stroke (Position
No. 1 in the illustration), and check the following
valves:
POSITION 1
NO. 1 AT TDC. AT
END OF COMPRESSION
STROKE
POSITION 2
ROTATE CRANKSHAFT
- 360
ONE REVOLUTION
DEGREES
Cyi. No.
lnt - Exh
1
2
3
4
5
6
2. When compressing valve spring (65 1 3) to
remove push rods (6565), make sure piston in
individual cylinder is below TDC to avoid contact
between valve and piston. To replace a push rod,
it will be necessary to loosen the rocker arm seat
retaining bolt and rotate rocker arm (6564) to the
side. After replacement of a push rod, rocker arm
or hydraulic valve tappet (6500), the engine
should not be cranked or rotated until valve
tappets have an opportunity to leak down to their
normal operating position. The leak-down rate
can be accelerated by using a valve tappet
bleed-down wrench on rocker arm and applying
pressure in a direction to collapse valve tappet.
·
A13128-B
Set Gap of Valves Noted
Crankshaft Position
1 2
No. n e
Exh lnt
lnt Exh
Exh lnt
lnt - Exh
None
lnt Exh
Engine, 3.8L
ROCKER ARM SEAT
AND BOLT MUST BE
FULLY SEATED AFTER
FINAL TORQUE
SPECIFICATIONS
Description
GENERAL SPECIFICATIONS
Displacement
Number of Cylinders
Bore
Stroke
Firing Order
011
Pressure (HOT 2500 RPM)
CYLINDER HEAD AND VALVE TRAIN
Combustion Chamber Volume
(CC)
Valve Guide Bore Diameter
• Intake and Exhaust
Valve Seats
• Width - Intake & Exhaust
• Angle
• Runout (T.I.R.)
Bore Diameter (Bearing
Counterbore Diameter)
• Intake
• Exhaust
Gasket Surface Flatness
Valve Stem to Guide Clearance
• Intake
• Exhaust
Valve Head Diameter
• Intake
• Exhaust
(Continued)
03-01 A-59
A13129-C
SPECIFICATIONS
Specification
3.8L
6
96.8 mm (3.81 in)
86.0 mm (3.39 in)
1 -4-2-5-3-6
40-60 psi
59.7-62.7
8. 7 45-8.720 mm
(0.3443-0.3433 in)
1 .5-2.0 mm (0.06-0.08 in)
44.47 degrees
0.076 mm (0.003 in)
47.097 mm ( 1 .8542 in)
MAX
47.072 mm ( 1 .8532 in) MIN
39.739 mm ( 1 .5645 in)
MAX
0.0 1 8 mm (0.007 in)
0.026-0.07 1 mm
(0.00 1 -0.0028 in)
0.038·0.083 mm
(0.00 1 5-0.0033 in)
45.3 mm ( 1 .78 in)
37. 1 mm ( 1 .46 in)
1997 Thunderbird, Cougar July 1 996