Chevrolet gasoline Big-block Mark IV 366 CID (6.0 L) High Torgue with 2-barrel carburetor 185 hp engine DIY maintenance and service manual

General Information

Chevrolet gasoline Big-block Mark IV 366 CID (6.0 L) High Torgue with 2-barrel carburetor 185 hp is an 366 in³ (6 L) internal combustion reciprocating V8 engine. It has bore/stroke ratio of 3.935 in × 3.76 in (9.995 cm × 9.55 cm), and uses 8.0:1 compression. This engine was rated 185 hp (137.95 kW) at 4000 rpm and 315 lbf⋅ft (427.08 N⋅m) of torque at 2200 rpm. It was used in Chevrolet and GMC cars.

Models:

B7, C5500 Kodiak, C60 Kodiak, C70 Kodiak

Engine Performance Rating

SAE J1349 (SAE Net)

Chevrolet gasoline Big-block Mark IV 366 CID (6.0 L) High Torgue with 2-barrel carburetor 185 hp engine performance rating according to SAE J1349 (SAE Net) standard.
Parameter	Output
Power Rating	185 hp (137.95 kW) at 4000 RPM
Torque Rating	427.08 N⋅m315 lbf⋅ft315 lbf⋅ft at 2200 RPM

SAE J1995 (SAE Gross)

Chevrolet gasoline Big-block Mark IV 366 CID (6.0 L) High Torgue with 2-barrel carburetor 185 hp engine performance rating according to SAE J1995 (SAE Gross) standard.
Parameter	Output
Power Rating	220 hp (164.05 kW) at 4000 RPM
Torque Rating	467.76 N⋅m345 lbf⋅ft345 lbf⋅ft at 2400 RPM

Specifications

General

Chevrolet gasoline Big-block Mark IV 366 CID (6.0 L) High Torgue with 2-barrel carburetor 185 hp engine general specifications.
Parameter	Value
Type	Internal Combustion Reciprocating
Fuel Type	Gasoline
Cylinder Configuration	V8
Engine Displacement	6 L366 in³366 in³
Bore	9.995 cm3.935 in3.935 in
Stroke	9.55 cm3.76 in3.76 in
Compression Ratio	8.0:1
Firing Order	1-8-4-3-6-5-7-2
Curb Weight	400.52 kg883 lb883 lb
Curb Idle Speed	800 RPMs

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Block, crankshaft and pistons

Chevrolet gasoline Big-block Mark IV 366 CID (6.0 L) High Torgue with 2-barrel carburetor 185 hp engine block, crankshaft and pistons specifications.
Parameter	Value
Block Material	Cast iron
Crankshaft Material	Forged steel, induction hardened main and rod journals
Piston Material	Cast aluminum alloy with valve pocket
Piston Pin Material	Chromium steel
Connecting Rod Material	Forged carbon steel; I-beam section

Spark Plugs and Wires

Chevrolet gasoline Big-block Mark IV 366 CID (6.0 L) High Torgue with 2-barrel carburetor 185 hp spark plugs and wires specifications.
Parameter	Value
Spark Plugs	AC Delco C42N (long reach)
Spark Plug Size	0.55 in0.55 in14 mm

Engine head and valvetrain

Chevrolet gasoline Big-block Mark IV 366 CID (6.0 L) High Torgue with 2-barrel carburetor 185 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 Big-block Mark IV 366 CID (6.0 L) High Torgue with 2-barrel carburetor 185 hp air intake specifications.
Parameter	Value
Air Intake Method	Naturally Aspirated

Fuel Injection

Chevrolet gasoline Big-block Mark IV 366 CID (6.0 L) High Torgue with 2-barrel carburetor 185 hp fuel injection specifications.
Parameter	Value
Injection Type	Carburetor
Injection Info	2-barrel Rochester downdraft type with manual choke control

Valve Timings

Chevrolet gasoline Big-block Mark IV 366 CID (6.0 L) High Torgue with 2-barrel carburetor 185 hp valve timings.
Parameter	Value
Intake Opens	46° B.T.D.C.
Intake Closes	90° A.B.D.C.
Intake Duration	316°
Exhaust Opens	86° B.B.D.C.
Exhaust Closes	50° A.T.D.C.
Exhaust Duration	316°
Valves Overlap	272°
Ignition Timing	8° B.T.C.

Chevrolet gasoline Big-block Mark IV 366 CID (6.0 L) High Torgue with 2-barrel carburetor 185 hp valve timing diagram.

Oil Pump

Chevrolet gasoline Big-block Mark IV 366 CID (6.0 L) High Torgue with 2-barrel carburetor 185 hp oil pump specifications.
Parameter	Value
Oil Pump	Gear type driven by distributor shaft
Oil Pump Pressure	3.74 atm.55 Psi55 Psi at 2000 RPM
Oil Pump Capacity	22.71 lpm5 UK gpm6 US gpm at 2000 RPM

Water Pump

Chevrolet gasoline Big-block Mark IV 366 CID (6.0 L) High Torgue with 2-barrel carburetor 185 hp water pump specifications.
Parameter	Value
Water Pump	Centrifugal; belt driven
Water Pump Capacity	306.58 lpm67.44 UK gpm81 US gpm at 4000 RPM