03·01A·6 1
Engine, 3.8L
03-01A·61
SPECIFICATIONS (Continued)
SPECIFICATIONS (Cont'd)
SPECIFICATIONS (Cont'd)
Description
Specification
Description
SpecHication
Thrust Bearing Journal
Side Clearance (Assembled to
• Length
29.725-29.775 mm.
Crank)
( 1 .703- 1 .722 in)
• Standard
0. 1 1 -0.29 mm
Connecting Rod Journal
(0.0047-0.0 1 14 in)
• Diameter
58.682-58.702 mm
• Service Limit
0.36 mm MAX (0.0 1 4 in
(2.3103-2.31 1 1 in)
MAX)
• Out-of-Round Limit
0.008 mm (0.0003 in) MAX
PISTON
in 45 degrees, 0.0 15 mm
(0.0006 in) TOTAL
• Taper Limit
0.008 mm per 25 mm
(0.0003 in per in)
• Surface Limit (RMS)
0.3 micrometers ( 1 1 .8
micro in)
Diameter
• Coded Red
96.76 1 -96.777 mm
(3.8095-3.8 101 in)
• Coded Blue
96.791 -96.807 mm
(3.8 1 07-3.81 13 in)
• Coded Yellow
96.82 1 -96.837 mm
Main Bearing Thrust Face
(3.81 1 9-3.8125 in)
• Surface Finish (RMS)
0.9 micrometers (0.354
micro in) FRONT;
0.6 micrometers (0.236
micro in) REAR
Piston-to-Bore Clearance
•
0.036-0.056 mm
(0.0014-0.0022 in)
• Runout Limit
0.025 mm (0.00 1 in)
Service Piston Selection
I.D. Code of Service
Flywheel Ring Gear Lateral
• Piston Bore Diameter
Piston Required
Runout (T.I.R.)
• 96.799-96.830 mm
Red
• Automatic Transmission
1 . 778 mm (0.07 in)
(3.81 10-3.8 1 22 in)
Crankshaft End Play
0 . 1 0-0.20 mm (0.004-0.008
in)
• 96.830-96.860 mm
Blue
(3.81 22-3.8 1 34 in)
• 96.860-96.891 mm
Yellow
Connecting Rod Bearings
(3.8 1 34-3.8 1 46 in)
Clearance to Crankshaft
When replacing pistons,
• Desired
0.025-0.035 mm
measure the cylinder bore as
(0.00 1 -0.00 1 4 in)
outlined in Section 03-oo.
• Allowable
0.022-0.069
Install the service piston
(0.00086-0.0027 in)
matched to the piston bore
diameter above.
Bearing Wall Thickness (Std)
1 .453- 1 .466 mm
(0.0572-0.0577 in)
Pin Bore Diameter
23. 1 70-23. 185 mm
(0.9 1 22-0.9128 in)
Main Bearings
Clearance to Crankshaft
• Desired
0.025-0.035 mm
(0.00 1 -0.0014 in)
• Allowable
0.0 1 3-0.058 mm
(0.0005-0.0023 in)
Ring Groove Width
• Compression (Top)
1 .550- 1 .530 mm
(0.06 10-0.0602 in)
• Compression (Bottom)
1 .550-1 .530 mm
(0.06 10-0.0602 in)
• Oil
4.030-4.055 mm
Bearing Wall Thickness
2.435-2.451 mm
(0. 1587-0. 1596 in)
(0.0959-0.0965 in)
Piston Pin
CONNECTING ROD, PISTON AND RINGS
• Length
76.5-77.2 mm (3.01 2-3.039
Connecting Rod
in)
• Piston Pin Bore Diameter
23. 1 05-23. 1 45 mm
• Diameter
23. 162-23. 1 75 mm
(0.9096-0.9 1 1 2 in)
(0.91 1 9-0.9124 in)
• Crankshaft Bearing Bore
6 1 .635-6 1 .655 mm
Pin to Piston Clearance
0.005-0.0 1 2 mm
Diameter
(2.4266-2.4274 in)
(0.0002-0.0005 in)
• Out-of-Round
0.008 mm (0.0003 in)
Pin to Rod Clearance
Press Fit 8 Kilonewtons
Limit-Piston Pin Bore
greater to 0.025 mm (0.00 1
in) (1)
( 1 800 lbs)
• Taper Limit Piston Bore
0.033 per 25 mm (0.0 1 3
per in)
Piston Rings
• Ring Width
• Length
1 50. 165- 150.240 mm
(Center-to-Center)
(5.912-5.915 in)
• Compression (Top)
1 .463- 1 .490 mm
(0.0576-0.0587 in)
Alignment (Bore-To-Bore Max.
Diff.)
• Twist
0.075 per 25 mm (0.003
per in)
• Bend
0.04 per 25 mm (0.00 1 6
• Compression (Bottom)
1 .463- 1 . 490 mm
(0.0576-0.0587 in)
• Oii Ring
Side Seal-Snug Fit
• Service Limit
Side Clearance 0. 1 5 mm
MAX (0.0006 in MAX)
per in)
(Continued)
(Continued)
1 997 Thunderbird, Cougar July 1996