Isuzu 4HG1 Engine Specs
The Isuzu 4HG1 engine is a four-cylinder, 4.6-liter diesel engine commonly used in commercial trucks and buses. Known for its reliability and durability, the 4HG1 engine has become a popular choice for various applications. Let’s take a closer look at its specifications and features.
Engine Configuration
- Type: Four-cylinder, inline
- Displacement: 4.6 liters (4,777 cc)
- Bore x Stroke: 105 mm x 125 mm
- Compression Ratio: 17.5:1
- Valvetrain: Overhead camshaft (OHC)
- Fuel System: Direct injection
- Turbocharged: Yes
The Isuzu 4HG1 engine features a four-cylinder, inline configuration, meaning all cylinders are arranged in a straight line. This design allows for a compact and efficient engine layout. With a displacement of 4.6 liters, the 4HG1 engine provides ample power and torque for heavy-duty applications.
The engine’s bore and stroke dimensions are 105 mm and 125 mm, respectively. This particular ratio helps optimize combustion efficiency and overall engine performance. With a compression ratio of 17.5:1, the 4HG1 engine achieves efficient fuel combustion, resulting in improved fuel economy.
Equipped with an overhead camshaft (OHC), the 4HG1 engine ensures precise valve control and smooth operation. The direct injection fuel system delivers fuel directly into the combustion chamber, enhancing combustion efficiency and reducing fuel consumption.
Furthermore, the 4HG1 engine is turbocharged, providing an extra boost of power by compressing the incoming air. This turbocharging feature enhances the engine’s performance, especially during heavy load conditions.
Engine Oil Specs & Service Intervals
Proper engine oil selection and regular maintenance are crucial for the longevity and performance of the Isuzu 4HG1 engine. Here are the recommended engine oil specifications and service intervals:
- Engine Oil Capacity: 10.5 liters
- Recommended Oil Type: API CF-4 or higher
- Viscosity: SAE 15W-40
The Isuzu 4HG1 engine requires approximately 10.5 liters of engine oil for proper lubrication. It is essential to use high-quality oil that meets or exceeds the API CF-4 specification or higher. This ensures optimal engine protection and performance.
When selecting engine oil, it is crucial to consider the viscosity grade. The recommended viscosity for the 4HG1 engine is SAE 15W-40. This viscosity provides excellent lubrication in both cold-start conditions and high-temperature operating environments.
Regarding service intervals, it is recommended to change the engine oil and oil filter every 10,000 kilometers or 6,000 miles. Regular oil changes help remove contaminants and maintain proper lubrication, ensuring the engine’s longevity and performance.
| Service | Interval |
|---|---|
| Engine Oil Change | Every 10,000 kilometers or 6,000 miles |
| Oil Filter Replacement | Every 10,000 kilometers or 6,000 miles |
Following these recommended service intervals and using the correct engine oil will help maintain the Isuzu 4HG1 engine’s performance, reliability, and longevity.
In conclusion, the Isuzu 4HG1 engine is a robust and efficient diesel engine widely used in commercial vehicles. Its four-cylinder, inline configuration, direct injection fuel system, and turbocharging feature contribute to its impressive performance. By adhering to the recommended engine oil specifications and service intervals, owners can ensure the engine’s longevity and optimal performance.
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