3044C Industrial Engine and Engines for Caterpillar Built Machines Caterpillar


Engine Design

Usage:

3044C 344



Illustration 1g01357763

Cylinder and valve location

(A) Inlet valve

(B) Exhaust valve

Bore ... 94 mm (3.70 inch)

Stroke ... 120 mm (4.72 inch)

Displacement ... 3.3 L (203 in3)

Cylinder arrangement ... In-line

Type of combustion

Naturally aspirated engines ... Indirect injection
Turbocharged engines ... Direct injection

Compression ratio

Naturally aspirated engines ... 22:1
Turbocharged engines ... 19:1

Number of cylinders ... 4

Valves per cylinder ... 2

Valve lash

Inlet valve ... 0.25 mm (0.0098 inch)
Exhaust valve ... 0.25 mm (0.0098 inch)

Firing order ... 1, 3, 4, 2

Fuel injection timing ... 5° BTC

When the crankshaft is viewed from the flywheel end of the engine, the crankshaft rotates in the following direction: ... Counterclockwise

When the camshaft is viewed from the flywheel end of the engine, the camshaft rotates in the following direction: ... Counterclockwise

Note: The left side and the right side of the engine are viewed from the flywheel end. The No. 1 cylinder is the front cylinder.

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