Engine Specifications

GENERAL ENGINE SPECIFICATIONS

Application		In. (mm)
3.3L
Displacement		201 Cu. In. (3.3L)
Bore		3.66 (92.9)
Stroke		3.19 (81.0)
Compression Ratio		8.9:1
Fuel System		PFI
Horsepower @ RPM		147 @ 4800
Torque Ft. Lbs. @ RPM		185 @ 3600
3.8L
Displacement		231 Cu. In. (3.8L)
Bore		3.78 (96.0)
Stroke		3.43 (87.1)
Compression Ratio		8.9:1
Fuel System		PFI
Horsepower @ RPM		151 @ 4400
Torque Ft. Lbs. @ RPM		204 @ 3200

MAIN & CONNECTING ROD BEARINGS SPECS

Application

In. (mm)

Crankshaft End Play

⁽¹⁾ .003-.009 (.08-.23)

Main Bearings

Journal Diameter

2.5192-2.5201 (63.987-64.013)

Journal Out-Of-Round

.001 (.03)

Journal Taper

.001 (.03)

Oil Clearance

.0007-.0030 (.019-.077)

Connecting Rod Bearings

Journal Diameter

2.2829-2.2840 (57.986-58.014)

Journal Out-Of-Round

.001 (.03)

Journal Taper

.001 (.03)

Oil Clearance

.0007-.0030 (.019-.077)

⁽¹⁾	Wear limit is .010" (.25 mm).

CONNECTING ROD SPECIFICATIONS

Application	In. (mm)
Side Play	.005-.015 (.13-.38)

PISTONS, PINS & RINGS SPECIFICATIONS

Application

In. (mm)

Pistons

Clearance

.0009-.0022 (.023-.056)

Diameter

3.3L

3.6594-3.6602 (92.949-92.969)

3.8L

3.7776-3.7783 (95.951-95.969)

Pins

Diameter

.9007-.9009 (22.878-22.883)

Piston Fit

.0002-.0008 (.005-.020)

Rod Fit ⁽¹⁾

.0007-.0014 (.018-.036)

Rings

No. 1 & No 2

End Gap

⁽²⁾ .0118-.0217 (.300-.551)

Side Clearance

⁽³⁾ .001-.003 (.03-.08)

No. 3 (Oil)

End Gap

.0098-.0394 (.249-1.001)

Side Clearance

.0006-.0089 (.015-.226)

⁽¹⁾	Interference fit.

⁽²⁾	Wear limit is .039" (.99 mm).

⁽³⁾	Wear limit is .004" (.10 mm).

CYLINDER BLOCK SPECIFICATIONS

Application			In. (mm)
Cylinder Bore
Standard Diameter
3.3L			3.6610-3.6617 (92.989-93.007)
3.8L			3.7792-3.7800 (95.992-96.012)
Maximum Taper			.002 (.05)
Maximum Out-Of-Round			.003 (.08)

VALVES & VALVE SPRINGS SPECIFICATIONS

Application

In. (mm)

Intake Valves

Face Angle

45°

Head Diameter

1.79 (45.5)

Minimum Margin

.031 (.79)

Minimum Refinish Length

4.916 (124.87)

Stem Diameter

.312-.313 (7.92-7.95)

Exhaust Valves

Face Angle

45°

Head Diameter

1.476 (37.49)

Minimum Margin

.047 (1.19)

Minimum Refinish Length

4.941 (125.50)

Stem Diameter

.3112-.3119 (7.904-7.922)

Valve Springs

Free Length

1.909 (48.49)

Installed Height

1.539-1.598 (39.10-40.60)

Pressure - 1991 ⁽¹⁾

Valve Closed

58-63 @ 1.57 (26-28 @ 39.9)

Valve Open

136-145 @ 1.14 (62-66 @ 29.0)

Pressure - 1992 ⁽¹⁾

Valve Closed

90-100 @ 1.57 (40.15-44.37 @ 39.9)

Valve Open

207-229 @ 1.17 (92.12-101.82 @ 29.7)

⁽¹⁾	Lbs. @ In. (kg @ mm).

CYLINDER HEAD SPECIFICATIONS

Application

In. (mm)

Max. Warpage

⁽¹⁾ .00075 Per 1 (.0191 Per 25)

Valve Seats

Intake Valve

Seat Angle

45°

Seat Width

.069-.088 (1.75-2.24)

Maximum Seat Runout

.002 (.05)

Exhaust Valve

Seat Angle

45°

Seat Width

.059-.079 (1.50-2.01)

Maximum Seat Runout

.002 (.05)

Valve Guides

Intake Valve

Valve Guide I.D.

.3130-.3149 (7.950-7.998)

Valve Stem-To-Guide Oil Clearance

⁽²⁾ .001-.003 (.03-.08)

Exhaust Valve

Valve Guide I.D.

.3130-.3149 (7.950-7.998)

Valve Stem-To-Guide Oil Clearance

⁽³⁾ .002-.006 (.05-.15)

⁽¹⁾	Combined maximum total grind limit of cylinder head and cylinder block is .008" (.20 mm).

⁽²⁾	Wear limit is .009" (.23 mm), measured with dial indicator at valve head with valve .551 (14 mm) off its seat.

⁽³⁾	Wear limit is .016" (.41 mm), measured with dial indicator at valve head with valve .551 (14 mm) off its seat.

CAMSHAFT SPECIFICATIONS

Application

In. (mm)

End Play

.005-.012 (.05-.30)

Journal Diameter

No. 1

1.9970-1.9990 (50.724-50.775)

No. 2

1.9809-1.9829 (50.317-50.368)

No. 3

1.9659-1.9679 (49.936-49.987)

No. 4

1.9540-1.9529 (49.632-49.606)

Oil Clearance

⁽¹⁾ .001-.003 (.0254-.0762)

⁽¹⁾	Wear limit is .005" (.13 mm).

VALVE LIFTERS SPECIFICATIONS

Application

In. (mm)

Bore Diameter

.9051-.9059 (22.990-23.010)

Lifter Diameter

⁽¹⁾ .9035-.9040 (22.949-22.962)

Oil Clearance

.0011-.0024 (.028-.061)

⁽¹⁾	Standard diameter valve lifter is listed. Oversize valve lifters are available in .001" (.03 mm), .008" (.20 mm) and .030" (.76 mm).