The Isuzu 4LE1 is a 2.2 L 4-cylinder naturally aspirated engine rated at 1800 rpm, producing up to 23.9 kW. It powers generator sets from Engine Manuals - Isuzu, Isuzu and MMD Equipment, including the 4LE1T, 4LE1NYBW and ILS-4LE1-A. It holds 6.7 L (1.8 gal) of oil and 3.8 L (1.0 gal) of coolant.
Also known as: Isuzu 4LE1, 4LE1
Part of the Isuzu 4LE1 engine family — 2 variants share parts & fitment.
| Oil capacity | 6.7 L |
|---|---|
| Coolant capacity | 3.8 L |
| Displacement | 2.2 L |
| Cylinders | 4 |
| Aspiration | naturally aspirated |
| Rated speed | 1800 rpm |
| Gross power | 23 kW |
Shared across brands: Engine Manuals - Isuzu, Isuzu, MMD Equipment
This engine also powers 2 machine(s) on Power Equipment Info.
Compiled from service & troubleshooting documentation across every generator set that uses the Isuzu 4LE1.
| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Replaceable Element | — | find | ||
| Fuel filter | 8944015310 | PartsGeek | |||
| Oil filter | Spin-on | 51334 | PartsGeek $7.98 | ||
| Belt | — | find | |||
| Coolant | — | ||||
| Oil | Spin-on | — |
Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.
| Part # | Description | Category |
|---|---|---|
| WSLE0406 | oil filter with full-flow bypass, water-cooled oil cooler and oil jet to cool the piston | oil_filter |
| WSLE0021 | valve clearance standard value for inlet valve (mm/in) | other_service |
| WSLE0022 | valve clearance standard value for exhaust valve (mm/in) | other_service |
Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.
Parts listed by aftermarket suppliers as fitting this engine — leads compiled from supplier catalogs; verify the exact part for your serial number.
Cross-referenced via Donaldson + OEM/engine-maker interchange — options to verify against your serial number, not confirmed for every exact variant.
Other equipment known to use this engine, via filter-application cross-reference — useful for sourcing parts even when your exact machine isn't listed elsewhere on this page.
The Isuzu 4LE1 engine has an oil capacity of 6.7 liters.
The Isuzu 4LE1 has a displacement of 2.2 liters with 4 cylinders.
The Isuzu 4LE1 powers 8 generator set(s), including Engine Manuals - Isuzu 4LE1, Engine Manuals - Isuzu 4LE1T, Isuzu 4LE1NYBW, Isuzu ILS-4LE1-A, Isuzu ILS-4LE1-C.
The Isuzu 4LE1 uses oil filter part numbers Isuzu 5876100080, Donaldson P550162, Wix 51334.
The Isuzu 4LE1 uses fuel filter part numbers Isuzu 8944015310, Donaldson P502166, Wix 33263.
The Isuzu 4LE1 uses air filter part numbers Isuzu 5864014350, Isuzu 8972599390, Donaldson P775687.
A commonly reported issue on generators using the Isuzu 4LE1 is: Starter runs but does not start. Fix: OK.