3.9L Isuzu 4BD2-TC Engine Specs

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)
Horsepower	135 hp @ 3,000 rpm
Torque	255 lb-ft @ 1,900 rpm
Idle Speed	800 rpm, +/- 25
Max Engine Speed	~ 3,500 rpm