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Engine Specifications

GENERAL DESCRIPTION

DESCRIPTION SPECIFICATION
Engine Type 90° V-8 OHV
Displacement 6.2 Liters
378 (Cubic Inches)
Bore 103.9 mm (4.09 in.)
Stroke 90.9 mm (3.58 in.)
Compression Ht. 32.48
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 Forged Aluminum Alloy
Connecting Rods Forged Powdered Metal
CYLINDER BLOCK

DESCRIPTION SPECIFICATION
Metric Standard
Cam Bore 1 Diameter 61.71 - 61.73 mm 2.4295 - 2.4303 in.
Cam Bore 2 Diameter 57.85 - 57.87 mm 2.2776 - 2.2783 in.
Cam Bore 3 Diameter 57.44 - 57.46 mm 2.2614 - 2.2622 in.
Cam Bore 4 Diameter 57.05 - 57.07 mm 2.2461 - 2.2469 in.
Cam Bore 5 Diameter 43.673 - 43.693 mm 1.7194 - 1.7202 in.
Cylinder Bore Diameter 103.9 mm 4.09 in.
Out of Round (MAX) 0.008 mm 0.0003 in.
Taper (MAX) 0.014 mm 0.0006 in.
Lifter Bore Diameter 21.45-21.42 mm 0.8444-0.8433 in.
PISTONS

DESCRIPTION SPECIFICATION
Metric Standard
Clearance Measured at 38.0 mm (1.5 in.) Below Deck 0.0425 - 0.0675 mm 0.001670 - 0.00266 in.
Ring Groove Diameter
Groove #1 95.3 - 95.5 mm 3.752 - 3.760 in.
Groove #2 93.1 - 93.3 mm 3.665 - 3.673 in.
Weight 502 grams 17.71 oz.
Piston Length 52.33 - 52.63 mm 2.060 - 2.072 in.
Ring Groove Width
No. 1 1.24 mm 0.0488 in
No. 2 1.24 mm 0.0488 in
No. 3 2.05 mm 0.0803 in.
PISTON RINGS

DESCRIPTION SPECIFICATION
Metric Standard
Ring Gap
Top Compression Ring 0.35 - 0.50 mm 0.0138 - 0.0197 in.
Second Compression Ring 0.65 - 0.90 mm 0.0255 - 0.0355 in.
Oil Control (Steel Rails) 0.15 - 0.45 mm 0.0059 - 0.0177 in.
Side Clearance
Top Compression Ring 0.040 - 0.072 mm 0.0016 - 0.0028 in.
Second Compression Ring 0.040 - 0.072 mm 0.0016 - 0.0028 in.
Oil Ring (Steel Ring) 0.061 - 0.210 mm 0.0024 - 0.0083 in.
Ring Width
Top Compression Ring 1.172 - 1.190 mm 0.0461 - 0.0468 in.
Second Compression Ring 1.172 - 1.190 mm 0.0461 - 0.0468 in.
Oil Ring (Steel Rails) 0.387 - 0.413 mm 0.0152 - 0.0163 in.
CONNECTING RODS

DESCRIPTION SPECIFICATION
Metric Standard
Side Clearance 0.07 - 0.35 mm 0.0028 - 0.0146 in.
CRANKSHAFT

DESCRIPTION SPECIFICATION
Metric Standard
Main Bearing Journal Diameter 64.978 - 65.002 mm 2.5582 - 2.5591 in.
Bearing Clearance 0.023 - 0.052 mm 0.0009 - 0.0020 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 53.992 - 54.008 mm 2.1257 - 2.1263 in.
Bearing Clearance 0.016 - 0.056 mm 0.0006 - 0.0022 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 0.080 - 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) 25.0°
Closes (ATDC) 253.0°
Duration 278.0°
Exhaust
Opens (BTDC) 278°
Closes (ATDC) 26°
Duration 304°
Valve Overlap 51°
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 1.18 - 1.62 mm 0.046 - 0.065 in.
Exhaust 1.48 - 1.92 mm 0.058 - 0.076 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 128.57 5.062
Exhaust 127.165 5.006
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 - 0.063 mm 0.0008 - 0.0025 in.
Exhaust 0.025 - 0.060 mm 0.0010 - 0.0024 in.
VALVE SPRING

DESCRIPTION SPECIFICATION
Metric Standard
Spring Force - Gage (Valve Closed)
Intake 510.0 N ± 26.0 N @ 52.1 mm 114.7 lbs. ± 5.8 lbs. @ 2.051 in.
Exhaust 510.0 N ± 26.0 N @ 52.1 mm 114.7 lbs. ± 5.8 lbs. @ 2.051 in.
Spring Force - Gage (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 (approximately)
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 - 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) 0.060 mm 0.002 in.
Outer Rotor to Pump Body Clearance (MAX) 0.306 mm 0.012 in.
Tip Clearance Between Rotors (MAX) 0.200 mm 0.008 in.
OIL PRESSURE

SPECIFICATION SPECIFICATION
At Curb Idle Speed (min.)* 90 kPa (13 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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