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Bare Cylinder Head Product NO.
| ML NO. | OEM NO. | REF NO. |
| MLG009 | MD303750 MD348983 MD351277 MD313587 MD984455 2200042A20 | 908513 |
| MLG010 | MD185926 MD109736 MD185920 MD139564 2210042900 | 908512 |
| MLG011 | MD185918 MD185922 MD109733 MD305542 MD103199 MD307786 2210042U00 | 908511 |
| MLG012 | 2210042700 | 908770 |
| MLG013 | 2210042750 2210042751 | 908771 |
Complete Cylinder Head Assembly for Mitsubishi 4D56 Diesel Engine – 2.5L SOHC/DOHC (Ready-to-Install)
Product Description
This high-quality cylinder head assembly is specially designed for the Mitsubishi 4D56 2.5L diesel engine. Manufactured using premium aluminum alloy, pressure-tested, and pre-assembled with all vital valvetrain components, it ensures easy installation, reliable combustion sealing, and long-lasting durability.
Ideal for engine rebuilds or direct replacement in passenger, commercial, and off-road vehicles, including Mitsubishi L200, Pajero, Delica, Triton, and more.
Product Performance Specifications
| Item | Specification |
|---|---|
| Engine Model | Mitsubishi 4D56 (SOHC/DOHC) |
| Displacement | 2.5L (2477cc) |
| Cylinder Configuration | Inline-4 |
| Valve Configuration | 8V or 16V (2 or 4 valves per cylinder) |
| Material | High-strength aluminum alloy |
| Cooling System | Water-cooled |
| Fuel Type | Diesel |
| Turbocharged | Compatible (Naturally aspirated or turbo) |
| Compression Ratio | Approx. 21:1 |
| Camshaft Drive | Timing belt |
| Manufacturing Tolerance | Within OEM standards |
| Pressure Testing | 100% tested for cracks and sealing integrity |
What’s Included in the Assembly
This cylinder head assembly comes fully assembled with:
• Cylinder head casting (aluminum)
• Intake and exhaust valves (hardened)
• Valve springs, retainers, locks
• Valve guides and seats (installed)
• Camshaft (SOHC or DOHC)
• Rocker arms or lash adjusters (as applicable)
• Camshaft bearings or bushings
• Valve stem seals
Ready-to-install on engine block without internal assembly needed.
Recommended Installation Parts (Not Included)
To ensure optimal engine operation and sealing performance, we strongly recommend purchasing and replacing the following during installation:
| Part | Description | Recommendation |
|---|---|---|
| Cylinder Head Gasket | Seals the cylinder head to engine block | Must Replace |
| Head Bolts (Stretch Type) | Ensure proper clamping | Must Replace |
| Valve Cover Gasket | Prevents oil leakage from top cover | Must Replace |
| Intake Manifold Gasket | Seals intake runners to cylinder head | Must Replace |
| Exhaust Manifold Gasket | Prevents exhaust leaks | Must Replace |
| Camshaft Oil Seal | Prevents front oil leakage | Replace if worn |
| Timing Belt & Tensioner | Drives camshaft | Replace if aged |
| Glow Plugs | Assist in cold start | Inspect or Replace |
| Water Pump & Gasket | Engine cooling | Optional but Recommended |
Installation Instructions and Precautions
1. Ensure engine block and cylinder head surfaces are clean, flat, and free from debris.
2. Use the correct torque sequence and tightening angles for head bolts as per OEM instructions.
3. Align timing marks for crankshaft and camshaft before engine startup.
4. Adjust valve clearances according to specifications if required.
5. Fill engine with new oil and coolant. Bleed the cooling system.
6. Pressure-test the cooling system and inspect for oil or fuel leaks.
7. Check compression after assembly to ensure correct valve seating and timing.
Vehicle Compatibility
Fits a wide range of Mitsubishi and Hyundai vehicles equipped with 4D56 engines, including:
• Mitsubishi L200 / Triton
• Mitsubishi Pajero / Montero / Shogun
• Mitsubishi Delica / L300 / L400
• Hyundai H100 / Galloper
• Fuso Canter / Rosa (light trucks)
Note: Please verify engine code (4D56 / 4D56T / 4D56U) and OEM number before purchase to ensure correct fitment.
Common Faults with Poor Quality Cylinder Heads
| Issue | Cause | Our Solution |
|---|---|---|
| Cracking between valves or coolant ports | Low-grade casting or overheating | Premium alloy + pressure testing |
| Oil leakage from valve stem area | Worn or hardened valve seals | New valve stem seals installed |
| Dropped valve seats | Improper press fit or overheating | Shrink-fit, hardened valve seats |
| Head warping or uneven combustion | Poor surface finish | CNC-machined sealing surface |
| Camshaft jamming | Improper clearances or oil starvation | Precision-machined journals and bore |
Market Application
Our 4D56 cylinder head assemblies are widely used in:
• Southeast Asia: Philippines, Thailand, Indonesia
• Middle East: UAE, Iran, Saudi Arabia
• Africa: Kenya, Nigeria, Egypt
• South America: Chile, Peru, Ecuador
• Eastern Europe: Romania, Poland, Turkey
Preferred by engine rebuilders, mechanics, diesel workshops, fleet service centers, and auto parts distributors.
