Isuzu 4BG1 User Manual

2. COOLANT
Where the atmospheric temperature falls below freezing point, the
cooling system should be drained after engine operation, but to
eliminate the need for repeated draining and refilling, the use of
anti-freeze solution is highly recommended.
A 50/50 Ethylene glycol base antifreeze/water mix.
(which provides protection to -37OC (-34°F) is recommended for use
in these ISUZU diesel engines).
Concentrations over 65% adversely affect freeze protection, heat
transfer rates, and silicate stability which may cause water pump
leakage.
Never exceed a 60/40 antifreeze/water mix.
(which provides protection to about -5OOC (-58°F).
76

Isuzu 4BG1 Specifications

General

Displacement	4.329 L
Compression Ratio	17.5:1
Aspiration	Naturally Aspirated
Cylinder Arrangement	Inline
Number of Cylinders	4
Fuel System	Direct Injection
Fuel Type	Diesel
Cooling System	Water-cooled
Starting System	Electric starter
Lubrication System	Forced lubrication
Engine Type	4-stroke, water-cooled, direct injection diesel