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Isuzu 4JA1 Series Engine
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Isuzu 4JA1 Series Engine
The J-series direct injection diesel engine was introduced in 1985, in 2.5 or 2.8 liter displacements. Initially installed only in lighter duty versions of the Isuzu Elf, it soon found its way into other Isuzu products. It replaced the somewhat smaller C engine; later on 3.1- and 3.0-liter versions were also introduced - still with four cylinders in line.
- PRODUCT DETAILS
| Engine Model | 4JA1 |
| Engine type | Water cooled, four-cycle, in-line, overhead valve |
| Combustion chamber type | Direct injection |
| Cylinder liner type | Dry |
| No. of cylinders - Bore x Stroke mm(in.) | 4 - 93.0 x 92.0 |
| (3.66 x 3.62) | |
| Displacement lit(cid) | 2.449 (152.4) |
| Compression ratio | 18.4 |
| Engine dimensions L*W*H (mm) | 805 x 625 x 729 |
| (31.7 x 24.6 x 28.7) | |
| Engine weight (Dry) kg(lb.) | 218 (480) |
| Fuel injection order | 1 – 3– 4 – 2 |
| *Fuel injection timing (B.T.D.C.) | 14 |
| degrees | |
| Specified fuel | Diesel fuel |
| Injection pump | In-line plunger, Bosch A type |
| Governor | Variable speed mechanical type |
| Low idle speed rpm | 850 – 1000 |
| Injection nozzle | Multi-hole type |
| Lubrication method | Pressurized circulation |
| Oil pump | Trochoid type |
| Main oil filter type | Cartridge paper element, full flow |
| Alternator V/A | 12 – 35 |
| Starter V-kW | 12-2.2 |
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Isuzu 4JA1 Series Engine
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