Applicable Engine:
4ZD1 / 4ZE1 / 4ZA1
Applicable Brand:
ISUZU
Applicable Car:
AMGO / ASKA / CAMPO / PICKUP / BRAVA / CAMPO / FRONTERA
Product parameters:
| Displacement | Fuel | Cylinder | Vale | Camshaft | Year |
| 1.0 / 1.3 / 1.5 | Gasoline | 4 | 8 | 2 | 1988 - 2000 |
Cylinder Head
Cylinder Head for Isuzu 4ZD1 4ZE1 4ZA1 Engine 910514
Introduction
Product NO.
| ML NO. | OEM NO. | REF NO. |
| MLG101A | 910513 | |
| MLG101B | 910514 | |
| MLG101C | 910516 | |
| MLG101D | 910512 | |
| MLG101E | 8970236740 | 910511 |
| MLG101F | 8941463202 | 910510 |
| MLG101G | 910515 |
Product Information Cylinder Head
SOHC | 8-Valve | Inline-4 | Petrol | Cast Aluminum
1. Overview
The Isuzu 4ZD1, 4ZE1, and 4ZA1 are part of the Isuzu G-series petrol engines, widely used in light trucks, SUVs, and commercial vehicles. These engines have earned a reputation for their reliability, durability, and fuel efficiency. These 8-valve, single overhead camshaft (SOHC) designs are commonly found in Isuzu pickups, SUVs, and commercial vehicles produced in the late 1980s and 1990s.
- 4ZD1: A 2.3L engine commonly found in light-duty pickups.
- 4ZE1: A 2.6L engine used in larger pickups and SUVs.
- 4ZA1: A 2.3L engine used in various regional models with similar specifications.
2. Technical Specifications
| Specification | 4ZD1 (2.3L) | 4ZE1 (2.6L) | 4ZA1 (2.3L) |
|---|---|---|---|
| Displacement | 2.3L (2254 cc) | 2.6L (2559 cc) | 2.3L (2300 cc) |
| Bore x Stroke | 92.6 x 86.0 mm | 92.6 x 95.0 mm | 92.6 x 86.0 mm |
| Engine Configuration | Inline-4 | Inline-4 | Inline-4 |
| Valvetrain | SOHC, 8 valves (2 per cylinder) | SOHC, 8 valves | SOHC, 8 valves |
| Fuel Type | Petrol (Carbureted or EFI) | Petrol (EFI in most cases) | Petrol (Carbureted or EFI) |
| Cylinder Head Material | Cast Aluminum | Cast Aluminum | Cast Aluminum |
| Cooling System | Water-cooled | Water-cooled | Water-cooled |
| Emissions Standard | Euro 2 (most models) | Euro 2 (most models) | Euro 2 |
3. OEM Cylinder Head Part Numbers (Examples)
| Engine | Sample OEM Numbers |
|---|---|
| 4ZD1 | 8941109330, 8941194290 |
| 4ZE1 | 8941176621, 8941304560 |
| 4ZA1 | 8941183190, 8941304570 |
OEM part numbers may vary by region, fuel system (EFI or carbureted), and valve configuration.
4. Compatible Vehicle Applications
| Vehicle Make | Models | Engine Type | Year Range |
|---|---|---|---|
| Isuzu | Pickup (TF), Trooper, Rodeo | 4ZD1, 4ZE1 | 1988–1997 |
| Chevrolet | LUV (Latin American models) | 4ZD1, 4ZE1 | 1990s |
| Holden | Rodeo, Jackaroo | 4ZD1, 4ZE1 | 1990s–2000s |
| Opel | Campo | 4ZD1, 4ZE1 | 1990s |
| Isuzu | Pickup (F-Series) | 4ZA1 | 1989–2000 |
These engines were used across multiple models in Asia, Australia, South America, and Europe.
5. Product Features
- High-quality cast aluminum construction for optimal heat dissipation
- Designed for carbureted or EFI intake systems
- Available as bare, semi-assembled, or fully assembled with valves, springs, and camshaft
- Precision machining of camshaft journals, valve seats, and coolant passages
- Supports both manual and automatic transmission variants
- Compatible with mechanical lifters or hydraulic lifters (depending on model year)
6. Common Issues & Maintenance Tips
| Problem | Cause | Suggested Action |
|---|---|---|
| Cracked or warped cylinder head | Overheating due to poor cooling system maintenance | Pressure test, resurface, or replace |
| Valve seat erosion | Poor fuel quality, engine wear | Regrind or replace valve seats |
| Camshaft wear | Lack of lubrication, high mileage | Replace camshaft, inspect lifters |
| Oil or coolant mixing | Blown head gasket or cracked head | Resurface head, replace gasket |
| Low compression | Worn valve guides, seals | Replace valve guides or seals |
7. Installation Guidelines
- Always replace head gasket, head bolts, and timing belt
- Torque head bolts to manufacturer specifications in proper sequence
- Ensure timing chain/belt is aligned correctly after head installation
- Clean cooling passages and oil channels before reassembly
- After installation, check valve lash if using mechanical lifters