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General Engine Specifications

GENERAL SPECIFICATIONS

Application Specification
Displacement 244 Cu. In.
Bore 3.44" (87.5 mm)
Stroke 3.25" (82.5 mm)
Compression Ratio 10.4:1
Fuel System SFI
Horsepower @ RPM 260 @ 5300
Torque Ft. Lbs. @ RPM 270 @ 4500
CRANKSHAFT, MAIN & CONNECTING ROD BEARINGS

Application In. (mm)
Crankshaft
End Play
Standard .0008-.0087 (.020-.220)
Wear Limit .0118 (.300)
Runout .0031 (.080)
Main Bearings
Journal Diameter (1)
Size Mark "00" 2.63779 (67.0000)
Size Mark "01" 2.63775 (66.9990)
Size Mark "02" 2.63771 (66.9980)
Size Mark "03" 2.63767 (66.9970)
Size Mark "04" 2.63763 (66.9960)
Size Mark "05" 2.63759 (66.9950)
Size Mark "06" 2.63755 (66.9940)
Size Mark "07" 2.63751 (66.9930)
Size Mark "08" 2.63748 (66.9920)
Size Mark "09" 2.63744 (66.9910)
Size Mark "10" 2.63740 (66.9900)
Size Mark "11" 2.63736 (66.9890)
Size Mark "12" 2.63732 (66.9880)
Journal Out-Of-Round .0008 (.020)
Journal Taper .0008 (.020)
Oil Clearance
No. 1 & 5
Standard .0006-.0013 (.014-.033)
Wear Limit .0017 (.043)
All Others
Standard .0010-.0018 (.026-.045)
Wear Limit .0022 (.055)
Connecting Rod Bearings
Journal Diameter (2)
Size Mark "1" 2.0470-2.0472 (51.994-52.000)
Size Mark "2" 2.0468-2.0470 (51.988-51.994)
Size Mark "3" 2.0465-2.0468 (51.982-51.988)
Journal Out-Of-Round .0008 (.020)
Journal Taper .0008 (.020)
Oil Clearance
Standard .0011-.0021 (.027-.053)
Wear Limit .0026 (.065)
(1) Main bearing journal diameter is identified by size mark on crankshaft. See Figure.
(2) Connecting rod bearing journal diameter is identified by size mark on crankshaft. See Figure.
CONNECTING RODS

Application In. (mm)
Bore Diameter
Pin Bushing Bore .8663-.8667 (22.005-22.014)
Crankpin Bore (1)
Size Mark "1" 2.1654-2.1656 (55.000-55.006)
Size Mark "2" 2.1656-2.1658 (55.006-55.012)
Size Mark "3" 2.1658-2.1661 (55.012-55.018)
Size Mark "4" 2.1661-2.1663 (55.018-55.024)
Maximum Bend .0020 Per 3.94 (.050 Per 100.1)
Maximum Twist .0059 Per 3.94 (.150 Per 100.1)
Side Play
Standard .0063-.0114 (.160-.290)
Wear Limit .0138 (.350)
(1) Crankpin diameter is identified by size mark on connecting rod cap. See Figure.
PISTONS, PINS & RINGS

Application In. (mm)
Pistons
Clearance
Standard .0031-.0039 (.080-.100)
Wear Limit .0047 (.012)
Diameter (1)
Size Mark "1" 3.4413-3.4417 (87.410-87.420)
Size Mark "2" 3.4417-3.4421 (87.420-87.430)
Size Mark "3" 3.4421-3.4425 (87.430-87.440)
Pins
Diameter .8660-.8664 (21.997-22.006)
Piston Fit (2)
Rod Fit
Standard .0002-.0004 (.005-.011)
Wear Limit .002 (.05)
Rings
No. 1
End Gap
Standard .0098-.0177 (.250-.450)
Maximum .0413 (1.050)
Side Clearance .0008-.0024 (.020-.060)
No. 2
End Gap
Standard .0138-.0197 (.350-.500)
Maximum .0433 (1.100)
Side Clearance .0008-.0024 (.020-.060)
No. 3 (Oil)
End Gap
Standard .0059-.0217 (.150-.550)
Wear Limit .0453 (1.150)
(1) Piston diameter is determined by size mark on top of piston. See Figure.
(2) With piston heated to 140°F (60°C), piston pin should slide into piston with thumb pressure.
CYLINDER BLOCK

Application In. (mm)
Cylinder Bore Standard Diameter (1)
Size Mark "1" 3.4449-3.4453 (87.500-87.510)
Size Mark "2" 3.4453-3.4457 (87.510-87.520)
Size Mark "3" 3.4457-3.4461 (87.520-87.530)
Main Bearing Bore Inside Diameter (2)
Size Mark "00" 2.83464 (72.0000)
Size Mark "01" 2.83468 (72.0010)
Size Mark "02" 2.83472 (72.0020)
Size Mark "03" 2.83476 (72.0030)
Size Mark "04" 2.83480 (72.0040)
Size Mark "05" 2.83484 (72.0050)
Size Mark "06" 2.83488 (72.0060)
Size Mark "07" 2.83492 (72.0070)
Size Mark "08" 2.83496 (72.0080)
Size Mark "09" 2.83500 (72.0090)
Size Mark "10" 2.83503 (72.0100)
Size Mark "11" 2.83507 (72.0110)
Size Mark "12" 2.83511 (72.0120)
Size Mark "13" 2.83515 (72.0130)
Size Mark "14" 2.83520 (72.0140)
Size Mark "15" 2.83523 (72.0150)
Size Mark "16" 2.83527 (72.0160)
Maximum Deck Warpage .0028 (.070)
(1) Cylinder bore diameter is identified by size mark on cylinder block. See Figure. Maximum diameter is 3.4539" (87.730 mm).
(2) Main bearing bore diameter is identified by size mark on cylinder block oil pan flange. See Figure.
VALVES & VALVE SPRINGS

Application Specification
Intake Valves
Face Angle 44.5°
Minimum Margin .020" (.50 mm)
Minimum Refinish Length 3.7224" (94.550 mm)
Stem Diameter .2350-.2356" (5.970-5.985 mm)
Exhaust Valves
Face Angle 44.5°
Minimum Margin .020" (.50 mm)
Minimum Refinish Length 3.7953" (96.400 mm)
Stem Diameter .2348-.2354" (5.965-5.980 mm)
Valve Springs
Free Length 2.039" (51.80 mm)
Out-Of-Square .079" (2.00 mm)
Lbs. @ In. (kg @ mm) 
Pressure 41.9-46.3 @ 1.295 (19.0-21.0 @ 32.90)
CYLINDER HEAD

Application Specification
Maximum Warpage
Cylinder Block Surface .0039" (0.10 mm)
Manifold Surface .0039" (0.10 mm)
Valve Seats
Intake Valve
Seat Angle 45°
Seat Width .039-.055" (1.00-1.40 mm)
Exhaust Valve
Seat Angle 45°
Seat Width .039-.055" (1.00-1.40 mm)
Valve Guides
Intake Valve
Valve Guide Cylinder Head Bore I.D.
Standard Valve Guide .4325-.4335" (10.985-11.012 mm)
Oversize Valve Guide .4344-.4355" (11.035-11.062 mm)
Valve Guide I.D. .2366-.2374" (6.010-6.030 mm)
Valve Stem-To-Guide Oil Clearance
Standard .0010-.0024" (.025-.060 mm)
Wear Limit .0031" (.080 mm)
Exhaust Valve
Valve Guide Cylinder Head Bore I.D.
Standard Valve Guide .4325-.4335" (10.985-11.012 mm)
Oversize Valve Guide .4344-.4355" (11.035-11.062 mm)
Valve Guide I.D. .2366-.2374" (6.010-6.030 mm)
Valve Stem-To-Guide Oil Clearance
Standard .0012-.0026" (.030-.065 mm)
Wear Limit .0039" (.100 mm)
CAMSHAFT

Application In. (mm)
End Play
Standard .0016-.0035 (.040-.090)
Wear Limit .0047 (.120)
Journal Diameter
Exhaust Camshaft
Thrust Journal (1) .9433-.9439 (23.959-23.975)
All Other Journals 1.0612-1.0618 (26.954-26.970)
Intake Camshaft
All Journals 1.0612-1.0618 (26.954-26.970)
Journal Runout .0031 (.080)
Lobe Height
Intake
Standard 1.6618-1.6657 (42.210-42.310)
Wear Limit 1.6560 (42.060)
Exhaust
Standard 1.6520-1.6560 (41.960-42.060)
Wear Limit 1.6460 (41.810)
Oil Clearance
Exhaust Camshaft
Thrust Journal (1)
Standard .0010-.0024 (.025-.061)
Wear Limit .0039 (.100)
All Other Journals
Standard .0012-.0026 (.030-.067)
Wear Limit .0039 (.100)
Intake Camshaft
All Journals
Standard .0012-.0026 (.030-.067)
Wear Limit .0039 (.100)
Gear Backlash
Standard .0008-.0079 (.020-.200)
Wear Limit .0118 (.300)
(1) Exhaust camshaft thrust journal is the small camshaft journal.
VALVE LIFTERS

Application In. (mm)
Bore Diameter 1.2205-1.2211 (31.000-31.016)
Lifter Diameter 1.2191-1.2195 (30.966-30.976)
Oil Clearance
Standard .0009-.0020 (.024-.050)
Wear Limit .0028 (.070)
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