Chevrolet gasoline Small-block Generation I 327 CID (5.4 L) High Torque 158 hp (1964-) engine DIY maintenance and service manual

General Information

Chevrolet gasoline Small-block Generation I 327 CID (5.4 L) High Torque 158 hp (1964-) is an 327 in³ (5.36 L) internal combustion reciprocating V8 engine. It has bore/stroke ratio of 4 in × 3.25 in (10.16 cm × 8.26 cm), and uses 8.0:1 compression. This engine was rated 158 hp (117.82 kW) at 4000 rpm and 280 lbf⋅ft (379.63 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 327 CID (5.4 L) High Torque 158 hp (1964-) engine performance rating according to SAE J1995 (SAE Gross) standard.
Parameter	Output
Power Rating	185 hp (137.95 kW) at 4400 RPM
Torque Rating	413.52 N⋅m305 lbf⋅ft305 lbf⋅ft at 2000 RPM

SAE J1349 (SAE Net)

Chevrolet gasoline Small-block Generation I 327 CID (5.4 L) High Torque 158 hp (1964-) engine performance rating according to SAE J1349 (SAE Net) standard.
Parameter	Output
Power Rating	158 hp (117.82 kW) at 4000 RPM
Torque Rating	379.63 N⋅m280 lbf⋅ft280 lbf⋅ft at 2000 RPM

Specifications

General

Chevrolet gasoline Small-block Generation I 327 CID (5.4 L) High Torque 158 hp (1964-) engine general specifications.
Parameter	Value
Type	Internal Combustion Reciprocating
Fuel Type	Gasoline
Cylinder Configuration	V8
Engine Displacement	5.36 L327 in³327 in³
Bore	10.16 cm4 in4 in
Stroke	8.26 cm3.25 in3.25 in
Compression Ratio	8.0:1
Firing Order	1-8-4-3-6-5-7-2
Curb Weight	282.13 kg622 lb622 lb
Curb Idle Speed	450-475 RPMs

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Block, crankshaft and pistons

Chevrolet gasoline Small-block Generation I 327 CID (5.4 L) High Torque 158 hp (1964-) 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; sump head; 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 327 CID (5.4 L) High Torque 158 hp (1964-) spark plugs and wires specifications.
Parameter	Value
Spark Plugs	AC Delco C42
Spark Plug Size	0.55 in0.55 in14 mm

Engine head and valvetrain

Chevrolet gasoline Small-block Generation I 327 CID (5.4 L) High Torque 158 hp (1964-) 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 327 CID (5.4 L) High Torque 158 hp (1964-) air intake specifications.
Parameter	Value
Air Intake Method	Naturally Aspirated

Fuel Injection

Chevrolet gasoline Small-block Generation I 327 CID (5.4 L) High Torque 158 hp (1964-) 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 327 CID (5.4 L) High Torque 158 hp (1964-) valve timings.
Parameter	Value
Intake Opens	12.5° B.T.D.C.
Intake Closes	57.5° A.B.D.C.
Intake Duration	250°
Exhaust Opens	54.5° B.B.D.C.
Exhaust Closes	15.5° A.T.D.C.
Exhaust Duration	250°
Valves Overlap	140°
Ignition Timing	8° B.T.C.

Chevrolet gasoline Small-block Generation I 327 CID (5.4 L) High Torque 158 hp (1964-) valve timing diagram.

Oil Pump

Chevrolet gasoline Small-block Generation I 327 CID (5.4 L) High Torque 158 hp (1964-) oil pump specifications.
Parameter	Value
Oil Pump	Spur-gear type driven by distributor shaft
Oil Pump Pressure	2.04 atm.30 Psi30 Psi at 1200 RPM
Oil Pump Capacity	15.97 lpm3.51 UK gpm4.22 US gpm at 1200 RPM

Water Pump

Chevrolet gasoline Small-block Generation I 327 CID (5.4 L) High Torque 158 hp (1964-) 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