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Engine Specifications

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GENERAL DESCRIPTION

DESCRIPTION SPECIFICATION
Engine Type 90° V-8 OHV
Displacement 6.4 Liters
392 (Cubic Inches)
Bore 103.9 mm (4.09 in.)
Stroke 94.6 mm (3.72 in.)
Compression Ratio 10.9:1
Firing Order 1-8-4-3-6-5-7-2
Lubrication Pressure Feed - Full Flow Filtration
Cooling System Liquid Cooled - Forced Circulation
Cylinder Block Cast Iron
Cylinder Head Aluminum
Crankshaft Forged Steel
Camshaft Cast Iron
Pistons Aluminum Alloy
Connecting Rods Powdered Metal
CYLINDER BLOCK

DESCRIPTION SPECIFICATION
Metric Standard
Cam Bore Diameter 65.52 mm 2.5795 in.
Cylinder Bore Diameter 103.9 mm 4.09 in.
Out of Round (MAX) 0.008 mm 0.0003 in.
Taper (MAX) 0.0127 mm 0.0005 in.
Lifter Bore Diameter 21.45 - 21.425 mm 0.8444 - 0.8435 in.
PISTONS

DESCRIPTION SPECIFICATION
Metric Standard
Clearance Measured at 38.0 mm (1.5 in.) Below Deck 0.0245 - 0.0515 mm 0.00096 - 0.0020 in.
Ring Groove Diameter
Groove #1 93.1 - 93.4 mm 3.665 - 3.677 in.
Groove #2 91.6 - 91.8 mm 3.606 - 3.614 in.
Weight 437 grams 15.41 oz.
Piston Length 54.70 - 55.30 mm 2.153 - 2.177 in.
Ring Groove Width
No. 1 1.2 mm 0.0472 in
No. 2 1.2 mm 0.0472 in
No. 3 2.0 mm 0.0787 in.
PISTON PINS

Description Specification
Metric Standard
Type Full Floating DLC Coated
Pin Outside Diameter 24.0055 ± 0.003 mm 0.9451 ± 0.0001 in.
Clearance in Piston 0.0045 - 0.0145 mm 0.0002 - 0.0006 in.
Clearance in Rod 0.055 - 0.0215 mm 0.0022 - 0.0008 in.
PISTON RINGS

DESCRIPTION SPECIFICATION
Metric Standard
Ring Gap
Top Compression Ring 0.30 - 0.40 mm 0.0118 - 0.0157 in.
Second Compression Ring 0.35 - 0.60 mm 0.0137 - 0.0236 in.
Oil Control (Steel Rails) 0.20 - 0.71 mm 0.0079 - 0.028 in.
Side Clearance
Top Compression Ring 0.02 - 0.068 mm 0.0007 - 0.0026 in.
Second Compression Ring 0.02 - 0.058 mm 0.0007 - 0.0022 in.
Oil Ring (Steel Ring) 0.019 - 0.229 mm 0.0007 - 0.0091 in.
Ring Width
Top Compression Ring 1.472 - 1.490 mm 0.0579 - 0.0586 in.
Second Compression Ring 1.472 - 1.490 mm 0.0579 - 0.0586 in.
Oil Ring (Steel Rails) 0.447 - 0.473 mm 0.0175 - 0.0186 in.
CONNECTING RODS

DESCRIPTION SPECIFICATION
Metric Standard
Side Clearance 0.10 - 0.35 mm 0.003 - 0.0137 in.
CRANKSHAFT

DESCRIPTION SPECIFICATION
Metric Standard
Main Bearing Journal Diameter 65 mm 2.6 in.
Bearing Clearance 0.023 - 0.051 mm 0.0009 - 0.002 in.
Out of Round (MAX) 0.005 mm 0.0002 in.
Taper (MAX) 0.003 mm 0.0001 in.
End Play 0.052 - 0.282 mm 0.002 - 0.011 in.
End Play (MAX) 0.282 mm 0.011 in.
Connecting Rod Journal Diameter 54.00 mm 2.126 in.
Bearing Clearance 0.020 - 0.074 mm 0.0007 - 0.0029 in.
Out of Round (MAX) 0.005 mm 0.0002 in.
Taper (MAX) 0.003 mm 0.0001 in.
CAMSHAFT

DESCRIPTION SPECIFICATION
Metric Standard
Bearing Journal Diameter
No. 1 67.72 mm 2.67 in.
No. 2 57.8 mm 2.27 in.
No. 3 57.4 mm 2.26 in.
No. 4 57.0 mm 2.24 in.
No. 5 43.633 mm 1.72 in.
Bearing To Journal Clearance Standard
No. 1 0.040 - 0.080 mm 0.0015 - 0.003 in.
No. 2 0.050 -0.090 mm 0.0019 - 0.0035 in.
No. 3 0.040 - 0.080 mm 0.0015 - 0.003 in.
No. 4 0.050 - 0.090 mm 0.0019 - 0.0035 in.
No. 5 0.040 - 0.080 mm 0.0015 - 0.003 in.
Camshaft End Play .080 - 0.290 mm 0.0031 - 0.0114 in.
Duration 288.0°
Valve Lift (@ Zero Lash)
Intake 15.0 mm 0.591 in.
Exhaust 14.2 mm 0.559 in.
VALVE TIMING

DESCRIPTION SPECIFICATION
Intake
Opens (BTDC) 36.0°
Closes (ATDC) 250.0°
Duration 286.0°
Exhaust
Opens (BTDC) 278°
Closes (ATDC) 10°
Valve Overlap 46°
CYLINDER HEAD

DESCRIPTION SPECIFICATION
Metric Standard
Valve Seat Angle 44.5° - 45.0°
Valve Seat Runout (MAX) 0.04 mm 0.0016 in.
Valve Seat Width
Intake 0.94 - 1.04 mm 0.037 - 0.041 in.
Exhaust 1.16 - 1.26 mm 0.046 - 0.050 in.
Guide Bore Diameter
Intake 7.975 - 7.997 mm 0.314 - 0.315 in.
Exhaust 7.975 - 7.990 mm 0.314 - 0.315 in.
HYDRAULIC TAPPETS

DESCRIPTION SPECIFICATION
Metric Standard
Body Diameter 21.387 - 21.405 mm 0.8420 - 0.8427 in.
Clearance (To Bore) 0.020 - 0.063 mm 0.0007 - 0.0024 in.
Dry Lash (at the valve) 3.0 mm 0.1181 in.
VALVES

DESCRIPTION SPECIFICATION
Metric Standard
Face Angle
Intake 45.5° - 46.0°
Exhaust 45.0° - 45.5°
Head Diameter
Intake 54.3 mm 2.138
Exhaust 42.0 mm 1.654
Length (Overall From Gage Line)
Intake 130.19 5.126
Exhaust 129.545 5.100
Stem Diameter
Intake 7.934 - 7.954 mm 0.312 - 0.313 in.
Exhaust 7.930 - 7.950 mm 0.312 - 0.313 in.
Stem - to - Guide Clearance
Intake 0.021 - 0.066 mm 0.0008 - 0.0025 in.
Exhaust 0.025 - 0.070 mm 0.0010 - 0.0028 in.
VALVE SPRING

DESCRIPTION SPECIFICATION
Metric Standard
Spring Force (Valve Closed)
Intake 510.0 N ± 26.0 N @ 52.1 mm 114.7 lbs. ± 5.8 lbs. @ 2.051 in.
Exhaust 571.0 N ± 26.0 N @ 51.2 mm 114.7 lbs. ± 5.8 lbs. @ 2.051 in.
Spring Force (Valve Open)
Intake 1500.0 N ± 70.0 N @ 37.6 mm 337.2 lbs. ± 15.7 lbs. @ 1.480 in.
Exhaust 1500.0 N ± 70.0 N @ 37.6 mm 337.2 lbs. ± 15.7 lbs. @ 1.480 in.
Free Length (approx.)
Intake 63.9 mm 2.516 in.
Exhaust 63.9 mm 2.516 in.
Number of Coils
Intake 8.55
Exhaust 8.55
Wire Diameter
Intake and Exhaust 5.65 X 4.51 mm 0.222 - 0.178 in.
Installed Height (Spring Seat to Bottom of Retainer)
Intake 52.1 mm 2.051 in.
Exhaust 51.2 mm 2.016 in.
OIL PUMP

DESCRIPTION SPECIFICATION
Metric Standard
Clearance Over Rotors (MAX) 0.095 mm 0.0038 in.
Outer Rotor to Pump Body Clearance (MAX) 0.235 mm 0.009 in.
Tip Clearance Between Rotors (MAX) 0.150 mm 0.006 in.
OIL PRESSURE

SPECIFICATION SPECIFICATION
At Curb Idle Speed (min.)* 25 kPa (4 psi)
@ 3000 RPM 170 - 758 kPa (25 - 110 psi)
* CAUTION: If pressure is zero at curb idle, DO NOT run engine 
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