Applicable Engine:
K21 / K25
Applicable Brand:
NISSAN
Applicable Car:
Product parameters:
| Displacement | Fuel | Cylinder | Vale | Camshaft | Year |
| 2.1L / 2.5L | Gasoline | 4 | 8 | 1 |
Complete Cylinder Head
Complete Cylinder Head Assembly for Nissan K25 K21 Industrial Gasoline Engines OEM Replacement
Introduction
Bare Cylinder Head Product NO.
| ML NO. | OEM NO. | REF NO. |
| MLG016 | 11040FY501 |
Product Description
This complete cylinder head assembly is designed for Nissan K21 and K25 gasoline engines, widely used in forklifts, material handling equipment, and light trucks. Manufactured with premium aluminum alloy and precision-machined for OEM-level performance, this assembly comes pre-installed with all critical valve train components to ensure a fast and hassle-free engine rebuild or head replacement.
Used in brands such as Nissan, Komatsu, TCM, Heli, Hangcha, Doosan, Mitsubishi forklifts, and other industrial applications.
Product Specifications
| Item | Specification |
|---|---|
| Engine Models | Nissan K21 / K25 |
| Displacement | K21: 2.1L / K25: 2.5L |
| Cylinder Configuration | Inline 4-cylinder |
| Valve Configuration | 8 valves (2 per cylinder) |
| Fuel Type | Gasoline / LPG |
| Cooling System | Water-cooled |
| Camshaft Type | SOHC (Single Overhead Camshaft) |
| Head Material | Cast Aluminum Alloy |
| Block Material | Cast Iron |
| Application | Industrial engines, forklifts, light-duty commercial vehicles |
| Emissions | EPA Tier 2 / Tier 3 compatible (depending on version) |
Assembly Includes (Pre-installed)
- Cylinder Head Casting (aluminum alloy)
- Intake & Exhaust Valves
- Valve Springs
- Valve Guides and Seats
- Valve Stem Seals
- Retainers and Keepers
- Camshaft (SOHC)
- Rocker Arms and Hydraulic Lifters
- Camshaft Bearings or Journals
Fully assembled and ready for installation — no internal engine work needed.
Required Parts for Installation (Not Included)
| Item | Function | Recommendation |
|---|---|---|
| Cylinder Head Gasket | Seals cylinder head to engine block | Must Replace |
| Head Bolts / Studs | Secure head under torque | Must Replace |
| Intake & Exhaust Gaskets | Seal manifolds to head | Must Replace |
| Rocker Cover Gasket | Prevents oil leakage | Replace |
| Timing Belt or Chain | Drives camshaft | Inspect/Replace |
| Thermostat Gasket | Optional, if disturbed | Inspect |
| Coolant, Oil & Filters | Fresh fluids after installation | Required |
Installation Notes
- Ensure block and head surfaces are clean, flat, and free from warpage.
- Use correct head bolt torque sequence and specifications.
- Confirm timing alignment before engine start.
- Refill coolant and oil. Bleed air from cooling system.
- Perform compression test and ignition timing check post-installation.
Common Applications
This cylinder head is compatible with forklifts and industrial vehicles using K-series engines, such as:
- Nissan Forklifts (K21 / K25)
- Komatsu Forklifts
- TCM / Heli / Hangcha
- Mitsubishi Forklifts (with K25)
- Doosan & Tailift
- LPG and dual-fuel industrial engines
- Some light commercial vehicles in regional markets
Common Faults Solved by Replacement
| Issue | Cause | Replacement Benefit |
|---|---|---|
| Cracks around combustion chambers | Overheating or poor casting | OEM-quality aluminum head prevents failure |
| Warped head deck | Improper torque or overheating | Precision-machined surface for tight seal |
| Valve wear or leakage | High operating hours | New valves, guides, and seals improve compression |
| Camshaft scoring | Oil starvation or aging | New camshaft and bearings ensure proper lubrication |
| Excessive oil consumption | Valve stem seal failure | New seals reduce oil burning |
Target Markets
These cylinder heads are widely used in:
- Material handling industries
- Forklift rental and maintenance companies
- Engine rebuilders and industrial workshops
- Spare parts distributors worldwide
Exported to:
Africa: Egypt, South Africa, Nigeria
Southeast Asia: Thailand, Vietnam, Philippines, Indonesia
Middle East: UAE, Saudi Arabia, Iran
Latin America: Chile, Brazil, Mexico
Eastern Europe & Russia