Applicable Engine:
WL / WLT / MD25TI
Applicable Brand:
FORD / MAZDA
Applicable Car:
B2500 / RANGER / BT 50
Product parameters:
| Displacement | Fuel | Cylinder | Vale | Camshaft | Year |
| 2.5D / 2.5TD | Diesel | 4 | 12 | 1 | 1998- |
Complete Cylinder Head
Complete Cylinder Head Assembly for Mazda WL WLT Diesel Engine 2.5L 8 Valve SOHC
Introduction
Bare Cylinder Head Product NO.
| ML NO. | OEM NO. | REF NO. |
| MLG015 | WL3110100H WL3110100J WL1110100E WL6110100D WL0110100G WL31101003 Y3100K0 40443225 4903053 | 908745 908744 |
Product Description
This high-quality complete cylinder head assembly is designed for the Mazda WL and WL-T 2.5L diesel engines, widely used in Mazda B2500, Ford Ranger, Ford Courier, and other light-duty vehicles. It comes fully assembled and ready to install, saving labor time and reducing engine downtime.
Engineered from durable aluminum alloy and precision-machined to OEM standards, this head ensures proper sealing, long-term durability, and compatibility with both naturally aspirated and turbocharged versions.
Product Specifications
| Item | Specification |
|---|---|
| Engine Models | Mazda WL / WL-T |
| Displacement | 2.5L (2499cc) |
| Cylinder Configuration | Inline 4-cylinder |
| Valvetrain Type | SOHC – Single Overhead Camshaft |
| Valve Configuration | 8 valves (2 per cylinder) |
| Fuel Type | Diesel |
| Cooling System | Water-cooled |
| Head Material | Cast Aluminum |
| Camshaft Drive | Timing belt |
| Turbo Compatible | Yes (WL-T version) |
| Pressure Testing | 100% leak-tested before delivery |
Assembly Includes (Pre-installed)
- Aluminum cylinder head casting
- Intake and exhaust valves
- Valve springs, retainers, keepers
- Valve guides and seats
- Valve stem seals
- Camshaft (SOHC)
- Rocker arms or rocker shaft assembly
- Camshaft bearings
- Hydraulic lash adjusters or tappets (varies by version)
This unit is pre-assembled and ready to mount directly onto the engine block.
Recommended Installation Parts (Not Included)
| Item | Function | Recommendation |
|---|---|---|
| Cylinder Head Gasket | Ensures combustion seal | Must Replace |
| Head Bolts / Studs | Clamp the head | Must Replace |
| Rocker Cover Gasket | Seals valve cover | Must Replace |
| Intake & Exhaust Manifold Gaskets | Prevent air and gas leakage | Must Replace |
| Timing Belt & Tensioner | Drives camshaft | Check or Replace |
| Camshaft Oil Seal | Prevents oil leaks | Replace if worn |
| Water Pump & Thermostat | Cooling system | Check or Replace |
| Oil & Filter | Fresh oil after head replacement | Required |
Installation Instructions
- Surface Prep: Ensure cylinder block and head mating surfaces are clean, flat, and free of old gasket material.
- Torque Head Bolts: Follow manufacturer’s torque sequence and specs. Typically torqued in 3 stages.
- Timing Alignment: Align timing belt marks before tightening camshaft pulley.
- Bleed Cooling System: After coolant refill, remove air from the system.
- Oil Priming: Pre-lubricate camshaft and rotate crankshaft manually before first start.
- Valve Clearance Check: Adjust if using solid lifters (varies by build).
Vehicle Applications
The WL engine cylinder head fits the following vehicles:
- Mazda B2500 (WL / WL-T)
- Mazda Proceed Marvie
- Ford Ranger 2.5 Diesel (WL engine)
- Ford Courier 2.5 Diesel
- Some variants of Kia Bongo (licensed engine)
- JDM and export market pickups and vans
Common Problems Solved by Replacement
| Problem | Cause | How We Solve It |
|---|---|---|
| Cracked head | Overheating or casting defect | Pressure-tested, quality aluminum |
| Valve leakage | Valve wear or poor sealing | New valves, springs, and seals |
| Poor compression | Worn seats or warped surface | CNC-machined flat deck surface |
| Oil consumption | Worn valve seals | All-new stem seals installed |
| Camshaft wear | Oil starvation or scoring | New camshaft with proper lubrication clearance |
Market Distribution
Our WL cylinder heads are popular in:
- Southeast Asia (Philippines, Thailand, Malaysia)
- Middle East (UAE, Iran, Oman)
- South America (Chile, Colombia, Bolivia)
- Africa (Kenya, Nigeria, Ghana)
- Eastern Europe (Poland, Romania)
Used by:
Mazda / Ford aftermarket support networks
Auto parts wholesalers
Diesel repair shops
Fleet maintenance centers
Pickup truck overhaulers