Chevrolet gasoline Small-block Generation I 283 CID (4.3 L) Trademaster High Torque 137 hp engine DIY maintenance and service manual

General Information

Chevrolet gasoline Small-block Generation I 283 CID (4.3 L) Trademaster High Torque 137 hp is an 283 in³ (4.64 L) internal combustion reciprocating V8 engine. It has bore/stroke ratio of 3.875 in × 3 in (9.842 cm × 7.62 cm), and uses 8.5:1 compression. This engine was rated 137 hp (102.16 kW) at 4000 rpm and 250 lbf⋅ft (338.95 N⋅m) of torque at 2000 rpm. It was used in Chevrolet and GMC cars.

Engine Performance Rating

SAE J1995 (SAE Gross)

Chevrolet gasoline Small-block Generation I 283 CID (4.3 L) Trademaster High Torque 137 hp engine performance rating according to SAE J1995 (SAE Gross) standard.
Parameter	Output
Power Rating	160 hp (119.31 kW) at 4200 RPM
Torque Rating	366.07 N⋅m270 lbf⋅ft270 lbf⋅ft at 2000 RPM

SAE J1349 (SAE Net)

Chevrolet gasoline Small-block Generation I 283 CID (4.3 L) Trademaster High Torque 137 hp engine performance rating according to SAE J1349 (SAE Net) standard.
Parameter	Output
Power Rating	137 hp (102.16 kW) at 4000 RPM
Torque Rating	338.95 N⋅m250 lbf⋅ft250 lbf⋅ft at 2000 RPM

Specifications

General

Chevrolet gasoline Small-block Generation I 283 CID (4.3 L) Trademaster High Torque 137 hp engine general specifications.
Parameter	Value
Type	Internal Combustion Reciprocating
Fuel Type	Gasoline
Cylinder Configuration	V8
Engine Displacement	4.64 L283 in³283 in³
Bore	9.842 cm3.875 in3.875 in
Stroke	7.62 cm3 in3 in
Compression Ratio	8.5:1
Firing Order	1-8-4-3-6-5-7-2
Curb Weight	275.33 kg607 lb607 lb
Curb Idle Speed	450-475 RPMs

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Block, crankshaft and pistons

Chevrolet gasoline Small-block Generation I 283 CID (4.3 L) Trademaster High Torque 137 hp engine block, crankshaft and pistons specifications.
Parameter	Value
Block Material	Cast alloy iron
Crankshaft Material	Forged, high carbon steel
Piston Material	Cast alloy aluminum with steel struts; recessed head; tin-plated; cam ground; 3 ring grooves above piston pin
Piston Pin Material	Tubular, hardened chrome-alloy steel
Connecting Rod Material	Forged carbon steel; I-beam section

Spark Plugs and Wires

Chevrolet gasoline Small-block Generation I 283 CID (4.3 L) Trademaster High Torque 137 hp spark plugs and wires specifications.
Parameter	Value
Spark Plugs	AC Delco 45
Spark Plug Size	0.55 in0.55 in14 mm
Spark Plug Gap	889 μm0.035 in0.035 in

Engine head and valvetrain

Chevrolet gasoline Small-block Generation I 283 CID (4.3 L) Trademaster High Torque 137 hp engine head and valvetrain specifications.
Parameter	Value
Head Material	Cast alloy iron
Valvetrain Type	OHV
Valves per Cylinder	2
Camshaft Material	Cast alloy iron

Air Intake

Chevrolet gasoline Small-block Generation I 283 CID (4.3 L) Trademaster High Torque 137 hp air intake specifications.
Parameter	Value
Air Intake Method	Naturally Aspirated

Fuel Injection

Chevrolet gasoline Small-block Generation I 283 CID (4.3 L) Trademaster High Torque 137 hp fuel injection specifications.
Parameter	Value
Injection Type	Carburetor
Injection Info	2-barrel Rochester downdraft type with manual choke control

Valve Timings

Chevrolet gasoline Small-block Generation I 283 CID (4.3 L) Trademaster High Torque 137 hp valve timings.
Parameter	Value
Intake Opens	18° B.T.D.C.
Intake Closes	54° A.B.D.C.
Intake Duration	252°
Exhaust Opens	52° B.B.D.C.
Exhaust Closes	20° A.T.D.C.
Exhaust Duration	252°
Valves Overlap	144°
Ignition Timing	4° B.T.C.

Chevrolet gasoline Small-block Generation I 283 CID (4.3 L) Trademaster High Torque 137 hp valve timing diagram.

Oil Pump

Chevrolet gasoline Small-block Generation I 283 CID (4.3 L) Trademaster High Torque 137 hp oil pump specifications.
Parameter	Value
Oil Pump	Spur-gear type driven by distributor shaft
Oil Pump Pressure	2.04 atm.30 Psi30 Psi at 2400 RPM
Oil Pump Capacity	15.52 lpm3.41 UK gpm4.1 US gpm at 2400 RPM

Water Pump

Chevrolet gasoline Small-block Generation I 283 CID (4.3 L) Trademaster High Torque 137 hp water pump specifications.
Parameter	Value
Water Pump	Centrifugal type driven by fan belt
Water Pump Capacity	168.43 lpm37.05 UK gpm44.5 US gpm at 4000 RPM