Engine Specifications
CAMSHAFTBearing Diameter (Inside)
No. 1 50.800 - 50.825 mm (2.000 - 2.001 in.)
No. 2 50.394 - 50.419 mm (1.984 - 1.985 in.)
No. 3 50.013 - 50.038 (1.969 - 1.970 in.)
No. 4 49.606 - 49.632 mm (1.953 - 1.954 in.)
No. 5 39.688 - 39.713 mm (1.5265 - 1.5653 in.)
Bearing Journal Diameter
No. 1 50.749 - 50.775 mm (1.998 - 1.999 in.)
No. 2 50.343 - 50.368 mm (1.982 - 1.983 in.)
No. 3 49.962 - 49.987 (1.967 - 1.968 in.)
No. 4 49.555 - 49.581 mm (1.951 - 1.952 in.)
No. 5 39.637 - 39.662 mm (1.5605 - 1.5615 in.)
Bearing to Journal Clearance
Standard 0.0254 - 0.0762 mm (0.001. 0.003 in.)
Max Allowable 0.127 mm (0.005 in.)
End Play 0.051. 0.254 mm (0.002 - 0.010 in.)
CONNECTING RODS
Piston Pin Bore Diameter 24.966 - 24.978 mm (0.9829 - 0.9834 in.)
Side Clearance (Two Rods) 0.152 - 0.356 mm (0.006 - 0.014 in.)
CRANKSHAFT
Rod Journal
Diameter 53.950 - 53.975 mm (2.124 - 2.125 in.)
Out of Round (Max) 0.0254 mm (0.001 in.)
Taper (Max) 0.0254 mm (0.001 in.)
Bearing Clearance
Standard 0.013 - 0.056 mm (0.0005 - 0.0022 in.)
Service Limit 0.0762 mm (0.003 in.)
Main Bearing Journals
Diameter 63.487 - 63.513 mm (2.4995 - 2.5005 in.)
Out of Round (Max) 0.0254 mm (0.001 in.)
Taper (Max) 0.0254 mm (0.001 in.)
Bearing Clearance
No. 1 0.013 - 0.038 mm (0.0005 - 0.0015 in.)
No. 2 - 5 0.013 - 0.051 mm (0.0005 - 0.0020 in.)
Service Limit
No. 1 0.0381 mm (0.0015 in.)
No. 2 - 5 0.064 mm (0.0025 in.)
End Play
Standard 0.051 - 0.178 mm (0.002 - 0.007 in.)
Service Limit 0.254 mm (0.010 in.)
CYLINDER BLOCK
Cylinder Bore
Diameter 99.308 - 99.371 mm (3.9098 - 3.9122 in.)
Out of Round (Max) 0.025 mm (0.001 in.)
Taper (Max) 0.025 mm (0.001 in.)
Oversize Limit 1.016 mm (0.040 in.)
Lifter Bore Diameter 22.99 - 23.01 mm (0.9501 - 0.9059 in.)
Distributor Drive Bushing (Press Fit)
Bushing to Bore Interference 0.0127 - 0.3556 (0.0005 - 0.0140 in.)
Shaft to Bushing Clearance 0.0178 - 0.0686 mm (0.0007 - 0.0027 in.)
CYLINDER HEAD
Valve Seat
Angle 44.25 - 44.75 °
Runout (Max) 0.0762 mm (0.003 in.)
Valve Seat Width (Finish)
Intake 1.016 - 1.542 mm (0.040 - 0.060 in.)
Exhaust 1.524 - 2.032 mm (0.060 - 0.080 in.)
VALVES
Valve Face Angle 43.25 - 43.75 °
Valve Head Diameter
Intake 48.666 mm (1.916 in.)
Exhaust 41.250 mm (1.624 in.)
Valve Length (Overall)
Intake 124.28 - 125.92 mm (4.893 - 4.918 in.)
Exhaust 124.64 - 125.27 mm (4.907 - 4.932 in.)
Valve Lift (@ Zero Lash) 10.973 mm (0.432 in.)
Valve Stem Diameter 7.899 - 7.925 mm (0.311. 0.312 in.)
Valve Guide Bore Diameter 7.950 - 7.976 mm (0.313 - 0.314 in.)
Valve Stem to Guide Clearance
Standard 0.0254 - 0.0762 mm (0.001 - 0.003 in.)
Service Limit (Rocking Method) 0.4318 mm (0.017 in.)
VALVE SPRINGS
Free Length 49.962 mm (1.967 in.)
Spring Tension
Valve Closed 378 N @ 41.66 mm (85 lbs. @ 1.64 in.)
Valve Open 890 N @ 30.89 mm (200 lbs. @ 1.212 in.)
Number of Coils 6.5
Installed Height 41.66 mm (1.64 in.)
Wire Diameter 4.50 mm (0.177 in.)
HYDRAULIC TAPPETS
Body Diameter 22.949 - 22.962 mm (0.9035 - 0.9040 in.)
Clearance in Block 0.0279 - 0.0610 mm (0.0011. 0.210 in.)
Dry Lash 1.524 - 5.334 mm (0.060 - 0.210 in.)
Push Rod Length 175.64 - 176.15 mm (6.915 - 6.935 in.)
OIL PRESSURE
Oil Pressure
@ Curb Idle (Min.)* 41.4 kPa (6 psi)
@ 3000 rpm 207 - 552 kPa (30 - 80 psi)
Bypass Valve Setting 62 - 103 kPa (9 - 15 psi)
Switch Actuating Pressure 34.5 - 48.3 kPa (5 - 7 psi)
* If oil pressure is zero at curb idle, DO NOT RUN ENGINE @ 3000 rpm.
OIL PUMP
Clearance Over Rotors (Max) 0.1016 mm (0.004 in.)
Cover Out of Flat (Max) 0.0381 mm (0.0015 in.)
Inner Rotor Thickness (Min) 20.955 mm (0.825 in.)
Outer Rotor
Clearance (Max) 0.3556 mm (0.014 in.)
Diameter (Min) 62.7126 mm (2.469 in.)
Thickness (Min) 20.955 mm (0.825 in.)
Tip Clearance Between Rotors (Max) 0.2032 mm (0.008 in.)
PISTONS
Clearance at Top of Skirt 0.0127 - 0.0381 mm (0.0005 - 0.0015 in.)
Land Clearance (Diameter) 0.635 - 1.016 mm (0.025 - 0.040 in.)
Piston Length 86.360 mm (3.40 in.)
Ring Groove Depth
# 1 & 2 4.572 - 4.826 mm (0.180 - 0.190 in.)
# 3 3.810 - 4.064 mm (0.150 - 0.160 in.)
Weight 592.6 - 596.6 grams (20.90 - 21.04 oz.)
PISTON PINS
Clearance
in piston 0.00635 - 0.01905 mm (0.00025 - 0.00075 in.)
in rod (interference) 0.0178 - 0.0356 mm (0.0007 - 0.0014 in.)
Diameter 24.996 - 25.001 mm (0.9841 - 0.9843 in.)
End Play None
Length 75.946 - 76.454 mm (2.990 - 3.010 in.)
PISTON RINGS
Ring Gap
Compression Rings 0.254 - 0.508 mm (0.010 - 0.020 in.)
Oil Control (Steel Rails) 0.254 - 1.270 mm (0.010 - 0.050 in.)
Ring Side Clearance
Compression Rings 0.038 - 0.076 mm (0.0015 - 0.0030 in.)
Oil Control (Steel Rails) 0.06 - 0.21 mm (0.002 - 0.008 in.)
Ring Width
Compression Rings 1.971 - 1.989 mm (0.0776 - 0.0783 in.)
Oil Control (Steel Rails) 3.848 - 3.975 mm (0.1515 - 0.1565 in.)
VALVE TIMING
Exhaust Valve
Closes 21 °ATDC
Opens 60 °BBDC
Duration 264 °
Intake Valve
Closes 61 °ABDC
Opens 10 °BBDC
Duration 250 °
Valve Overlap 31 °