03-01A-59
Engine, 3.8L
03-01A-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
ONE REVOLUTION
- 360
DEGREES
Cyi. No.
A13128-B
Set Gap of Valves Noted
Crankshaft Position
1
2
1
lnt-Exh
No.ne
2
Exh
lnt
3
lnt
Exh
4
Exh
lnt
5
None
lnt-Exh
6
lnt
Exh
2.
When compressing valve spring (651 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.
ROCKER ARM SEAT
AND BOLT MUST BE
FULLY SEATED AFTER
FINAL TORQUE
SPECIFICATIONS
A13129-C
SPECIFICATIONS
Description
Specification
GENERAL SPECIFICATIONS
Displacement
3.8L
Number of Cylinders
6
Bore
96.8 mm (3.81 in)
Stroke
86.0 mm (3.39 in)
Firing Order
1 -4-2-5-3-6
011
Pressure (HOT 2500 RPM)
40-60 psi
CYLINDER HEAD AND VALVE TRAIN
Combustion Chamber Volume
59.7-62.7
(CC)
Valve Guide Bore Diameter
• Intake and Exhaust
8. 7 45-8.720 mm
(0.3443-0.3433 in)
Valve Seats
• Width-Intake
&
Exhaust
1 .5-2.0 mm (0.06-0.08 in)
• Angle
44.47 degrees
• Runout (T.I.R.)
0.076 mm (0.003 in)
Bore Diameter (Bearing
Counterbore Diameter)
• Intake
47.097 mm ( 1 .8542 in)
MAX
47.072 mm ( 1 .8532 in) MIN
• Exhaust
39.739 mm
(
1 .5645 in)
MAX
Gasket Surface Flatness
0.0 1 8 mm (0.007 in)
Valve Stem to Guide Clearance
• Intake
0.026-0.07 1 mm
(0.001 -0.0028 in)
• Exhaust
0.038·0.083 mm
(0.00 15-0.0033 in)
Valve Head Diameter
• Intake
45.3 mm ( 1 .78 in)
• Exhaust
37. 1 mm ( 1 .46 in)
(Continued)
1997 Thunderbird, Cougar July 1996
Содержание Thunderbird
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