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3.9L Isuzu 4BD2-TC

Isuzu 4BD2-TC Diesel Specs (1992 - 1998)

The Isuzu 4BD2-TC is an indirect injection, turbocharged diesel engine with a nominal 3.9 liter displacement. The engine was used in Isuzu and GM cab-over trucks from 1992 to 1998. It is considered an improved version of its predecessor, the 4BD1-T, although the performance ratings of both engines are similar. The engine was ultimately replaced by the 4HE1, a 4.8L 4 cylinder, direct injection turbodiesel with a significantly higher torque rating.

3.9L Isuzu 4BD2 Engine Specs

Engine:

Isuzu 4BD2-TC

Manufacturer:

Isuzu Motors Ltd.

Applications:

1992 - 1998 Isuzu N-Series
1992 - 1998 Chevrolet W3/W4
1992 - 1998 GMC W3500/W4500

Type:

4 stroke IDI (indirect injection)

Configuration:

Inline 4 cylinder (I-4/L-4)

Displacement:

3.856 liters, 235.3 cubic inches (nominal 3.9 liters, 235 CID)

Firing Order:

1 - 3 - 4 - 2

Engine Block:

Cast iron, dry type cylinder liners

Cylinder Head:

Cast iron

Compression Ratio:

20 : 1

Cylinder Bore:

4.02 in (102 mm)

Cylinder Stroke:

4.65 in (118 mm)

Valvetrain:

Overhead valve (OHV), gear driven camshaft, solid lifters

Injection:

Indirect injection, mechanical injection pump

Aspiration:

Turbocharged, intercooled

Engine Oil Capacity:

11.84 quarts w/ filter change (11.2 liters)

Peak Horsepower:

135 hp @ 3,000 RPM

Peak Torque:

255 lb-ft @ 1,900 RPM

Idle Speed:

800 RPM, +/- 25

Max Engine Speed:

~ 3,500 RPM