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Home >> Buick >> 1989 >> Electra Estate Wagon >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> 3.8L "3800" V6 - VIN [C] >> Engine Specifications

Engine Specifications

GENERAL SPECIFICATIONS

Application In. (mm)
Displacement
Cubic Inches 231
Liters 3.8
Fuel System MPFI
HP @ RPM 165 @ 5200
Torque Ft. @ RPM 210 @ 2000
Compression Ratio 9.5:1
Bore 3.80 (96.5)
Stroke 3.40 (86.3)
PISTONS, PINS & RINGS SPECIFICATIONS

Application (1) In. (mm)
Piston Clearance (2) .0004-.0022 (.010-.056)
Piston Pin
Pin-Diameter .90531-.90551 (22.995-23.000)
Pin-to-Piston Fit .0004-.0008 (.010-.020)
Pin-to-Rod Fit .0007-.0017 (.018-.043)
Rings
Ring No. 1
End Gap .012-.022 (.305-.559)
Side Clearance .0013-.0031 (.033-.079)
Ring No. 2
End Gap .010-.025 (.254-.635)
Side Clearance .0013-.0031 (.033-.079)
Ring No. 3
End Gap .015-.055 (.381-1.397)
Side Clearance .0011-.00816 (.028-.206)
Ring Groove Depth
Ring No. 1 0.173-0.178 (4.389-4.519)
Ring No. 2 0.173-0.178 (4.389-4.519)
Ring No. 3 0.165-0.171 (4.204-4.334)
Ring Width
Ring No. 1 0.0581-0.0589 (1.476-1.497)
Ring No. 2 0.0581-0.0589 (1.476-1.497)
Ring No. 3 0.1122-0.1182 (2.850-3.002)
(1) Specifications have been revised due to General Motors TSB 57-61-17, dated 05/18/1995.
(2) Piston clearance measured at 1.732 INCHES (44mm) from top of piston.
CRANKSHAFT MAIN & CONNECTING ROD BEARINGS

Application In. (mm)
Crankshaft
Crankshaft End Play .003-.011 (.08-.38)
Journal Out-Of-Round .0003-.0018 (.008-.046)
Main Bearings
Journal Diameter 2.4988-2.4998 (63.469-63.495)
Oil Clearance .0003-.0018 (.008-.046)
Connecting Rod Bearings
Journal Diameter 2.2487-2.2499 (57.117-57.147)
Oil Clearance .0003-.0026 (.008-.066)
CONNECTING ROD SPECIFICATIONS

Application In. (mm)
Side Play .003-.015 (.08-.38)
Maximum Bend & Twist (1)
Large Bore Diameter 2.3738-2.3745 (60.295-60.312)
(1) Service limit is .012" (.30 mm).
CYLINDER HEAD SPECIFICATIONS

Application In. (mm)
Maximum Cylinder Head Warp (1)
Intake
Valve Seats
Seat Angle 45°
Maximum Runout .002 (.05)
Seat Width .060-.080 (1.52-2.03)
Seat Bore Diameter N/A
Valve Guides (Valve Stem Oil Clearance) .0015-.0035 (.038-.089)
Exhaust
Valve Seats
Seat Angle 45°
Maximum Runout .002 (.05)
Seat Width .090-.110 (2.29-2.79)
Valve Guides (Valve Stem Oil Clearance) .0015-.0032 (.038-.081)
(1) Replace cylinder head if material removed exceeds .010" (.25 mm). See text for cylinder head thickness.
CYLINDER BLOCK SPECIFICATIONS

Application In. (mm)
Maximum Block Warp (1)
Cylinder Bore
Standard Diameter 3.80 (96.5)
Maximum Taper .0005 (.013)
Maximum Out-of-Round .0004 (.010)
(1) Replace block if material removed exceeds .010" (.25 mm).
VALVES & VALVE SPRINGS SPECIFICATIONS

Application In. (mm)
Valves
Face Angle 45°
Minimum Margin .025 (.64)
Valves Springs
Free Length 1.981 (50.32)
Installed Height 1.690-1.750 (42.93-44.45)
Pressure (1)
Valve Closed 76-84 @ 1.750 (34-38 @ 44.45)
Valve Open 200-220 @ 1.315 (90-99 @ 33.40)
(1) Lbs. @ In. (Kg @ mm).
CAMSHAFT SPECIFICATIONS

Application In. (mm)
Journal Diameter 1.7850-1.7860 (45.339-45.364)
Oil Clearance .0005-.0035 (.013-.089)
Bearing Bore 1.7865-1.7885 (45.377-45.428)
Lobe Lift (1)
(1) Lobe lift for intake valves is .250" (6.35 mm) or .255" (6.48 mm) for exhaust valves.
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