Applicable Engine:
4G63-8V / 4G64-8V
Applicable Brand:
MITSUBISHI / HYUNDAI
Applicable Car:
L200 / L300 / Lancer / Pajero / Galant
Product parameters:
| Displacement | Fuel | Cylinder | Vale | Camshaft | Year |
| 2.0 / 2.4 |
Gasoline
|
4 | 8 | 1 |
Cylinder Head
Mitsubishi 4G63 4G64 engine cylinder head for Pajero Galant MD099086 MD099389 2210032680 L200 L300
Introduction
Product NO.
| ML NO. | OEM NO. | REF NO. |
| MLG065 | MD099086 MD188956 | |
| MLG066 | MD099389 2210032680 |
Product Information Cylinder Head
1. Product Overview
The Mitsubishi 4G63 and 4G64 are part of the robust Sirius engine family, widely used in both passenger cars and light commercial vehicles. The 8-valve SOHC variants are simpler and more rugged compared to their 16-valve DOHC counterparts, ideal for markets valuing easy maintenance and high torque at low RPM.
These cylinder heads are made of aluminum alloy, with cast iron blocks, typically paired with a timing belt, mechanical rocker arms, and multi-point fuel injection (MPI) or carburetors depending on the application.
2. Technical Specifications
| Item | 4G63-8V | 4G64-8V |
|---|---|---|
| Displacement | 2.0L (1997cc) | 2.4L (2351cc) |
| Valvetrain | SOHC, 8-Valve | SOHC, 8-Valve |
| Cylinder Head Material | Aluminum Alloy | Aluminum Alloy |
| Fuel Type | Gasoline | Gasoline |
| Timing | Timing Belt | Timing Belt |
| Cooling | Water-cooled | Water-cooled |
| Compression Ratio | ~9.0:1 (varies) | ~9.0:1 (varies) |
| Aspiration | Naturally Aspirated / Turbo (select trims) | Naturally Aspirated |
3. OEM Cylinder Head Part Numbers
| Part Number | Application |
|---|---|
| MD040517 | 4G63 8V early SOHC |
| MD303750 | 4G63 SOHC head with rocker shaft |
| MD346500 | 4G64 8V SOHC (Delica, L300) |
| MD334593 / MD351016 | Common castings used on both engines (varies by market) |
4. Compatible Vehicles
4G63 8-Valve Applications:
- Mitsubishi Lancer (select trims)
- Mitsubishi Galant (early models)
- Hyundai Elantra (licensed engines)
- Proton Wira / Saga (Mitsubishi platform)
- Mitsubishi L300 / Delica
- Mitsubishi Pajero (select markets)
4G64 8-Valve Applications:
- Mitsubishi L300 / Delica
- Mitsubishi Pajero 2.4L (SOHC version)
- Mitsubishi Space Gear
- Mitsubishi Triton / Strada (early trims)
- Chery / Dongfeng / Great Wall (using 4G64 clone engines)
5. Product Options
| Type | Description |
|---|---|
| Bare Cylinder Head | Casting only, no valve train |
| Semi-Complete Head | Includes valves, guides, springs |
| Complete Head Assembly | Includes camshaft, rocker arms, fully assembled |
High-strength aluminum alloy
Precision-machined sealing surfaces
Compatible with OEM timing components
Configurable with or without EGR port
Suitable for carbureted or MPI configurations
6. Installation Notes
- Always replace head gasket and use new bolts or studs
- Clean oil & coolant passages thoroughly
- Adjust valve lash (usually 0.15mm intake / 0.25mm exhaust cold)
- Torque cylinder head bolts in OEM sequence and specs (e.g., 88 Nm in two steps)
- Check camshaft and rocker clearance before startup
- For LPG/CNG models, consider hardened exhaust seats
7. Common Cylinder Head Issues & Repair Advice
| Issue | Cause | Symptom | Solution |
|---|---|---|---|
| Cracked Head | Overheating or poor coolant | White smoke, coolant loss | Replace head, inspect gasket & block |
| Valve Recession | Long-term wear or LPG | Misfire, poor compression | Valve job or seat replacement |
| Worn Rocker Arms | Low oil pressure or sludge | Ticking noise | Replace rocker shaft assembly |
| Warped Deck | Overheating | Gasket failure, coolant in oil | Resurface or replace head |
| Oil in Coolant | Head crack or gasket failure | Milky coolant, overheating | Pressure test + new gasket or head |
8. Export & Service Markets
- Asia: Philippines, Pakistan, Indonesia, Vietnam, Malaysia
- Middle East: Iran, Iraq, Syria, Jordan
- Africa: Nigeria, Kenya, Egypt, South Africa
- Latin America: Ecuador, Peru, Bolivia
- Russia / CIS: L300 and Pajero platforms
- Australia: Classic Triton / L300 support