Chevrolet gasoline Big-block Mark IV 396 CID (6.5 L) and 402 CID (6.6 L) 396 L34 360 hp engine DIY maintenance and service manual

General Information

Chevrolet gasoline Big-block Mark IV 396 CID (6.5 L) and 402 CID (6.6 L) 396 L34 360 hp is an 396 in³ (6.49 L) internal combustion reciprocating V8 engine. It has bore/stroke ratio of 4.094 in × 3.76 in (10.399 cm × 9.55 cm), and uses 10.25:1 compression. This engine was rated 360 hp (268.45 kW) at 5600 rpm and 420 lbf⋅ft (569.44 N⋅m) of torque at 3600 rpm. It was used in Chevrolet cars.

Produced from 1966 to 1969, Holley (Q-jet 1968-1969) carburetor, hydraulic lifters, oval port closed chamber heads, forged steel crankshaft, and two-bolt main caps.

Engine Performance Rating

SAE J1349 (SAE Net)

Chevrolet gasoline Big-block Mark IV 396 CID (6.5 L) and 402 CID (6.6 L) 396 L34 360 hp engine performance rating according to SAE J1349 (SAE Net) standard.
Parameter	Output
Power Rating	360 hp (268.45 kW) at 5600 RPM
Torque Rating	569.44 N⋅m420 lbf⋅ft420 lbf⋅ft at 3600 RPM

Specifications

General

Chevrolet gasoline Big-block Mark IV 396 CID (6.5 L) and 402 CID (6.6 L) 396 L34 360 hp engine general specifications.
Parameter	Value
Type	Internal Combustion Reciprocating
Fuel Type	Gasoline
Cylinder Configuration	V8
Engine Displacement	6.49 L396 in³396 in³
Bore	10.399 cm4.094 in4.094 in
Stroke	9.55 cm3.76 in3.76 in
Compression Ratio	10.25:1

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Block, crankshaft and pistons

Chevrolet gasoline Big-block Mark IV 396 CID (6.5 L) and 402 CID (6.6 L) 396 L34 360 hp engine block, crankshaft and pistons specifications.
Parameter	Value
Block Material	Cast Iron

Engine head and valvetrain

Chevrolet gasoline Big-block Mark IV 396 CID (6.5 L) and 402 CID (6.6 L) 396 L34 360 hp engine head and valvetrain specifications.
Parameter	Value
Valvetrain Type	OHV
Valves per Cylinder	2

Fuel Injection

Chevrolet gasoline Big-block Mark IV 396 CID (6.5 L) and 402 CID (6.6 L) 396 L34 360 hp fuel injection specifications.
Parameter	Value
Injection Type	Carburetor