Engine Piston Kit WLY3-11-SAO WLY3-11-SA0C For MAZDA WL / WL-T / WL5 2.5D Bongo Brawny Titan B-Series BT-50 Ford Courier Ranger — 93mm STD, Alfin, Compression Height 47.8mm / 51.7mm To Confirm
Basic Properties
Place of Origin:
China
Brand Name:
YIMI
Certification:
ISO/TS16949
Model Number:
MAZDA WL / WL-T / WL5 2.5D Bongo Brawny Titan B-Series BT-50 Ford Courier Ranger
Trading Properties
Minimum Order Quantity:
4 pcs
Price:
Negotiable
Payment Terms:
T/T
Supply Ability:
4000 pcs/month
Specifications
| OEM Part Number: | WLY3-11-SAO / WLY3-11-SA0C | Part Name: | Engine Piston Kit (Piston With Pin & Circlips; Rings NOT Included Unless Specified) |
| Engine Compatibility: | MAZDA WL / WL-T / WL5 (2,499 Cc, 93.0 × 92.0 Mm) | Vehicle Models: | MAZDA Bongo Brawny / Friendee, Titan, B-Series / B2500, BT-50, MPV, Proceed; Ford Courier 2500TD, Ranger 2500TD Hi-T |
| Material: | Aluminum Alloy With Alfin Insert (variant-dependent) | Piston Diameter: | 93.00 Mm (STD) |
| Compression Height: | 47.80 Mm (WL/WL-T 12V) OR 51.70 Mm (BT-50 WLAT 16V) — Must Confirm | Total Length: | 87.30 Mm (47.8mm Version) |
| Piston Pin Diameter: | 32.00 Mm | Ring Groove Widths: | 2.5 / 2.0 / 3.0 Mm (Top / Second / Oil) |
| Recess Depth: | 2.20 Mm (47.8mm Version Reference) | Cylinder Configuration: | 4-cylinder Inline, SOHC, Naturally Aspirated & Turbocharged |
| Condition: | Brand New — 100% Pressure Tested | Warranty: | 12 Months |
| Repair Sizes: | STD (93.00 Mm), +0.50 Mm (93.50 Mm) Available | Kit Contents: | Piston + Pin + Circlips (rings Typically NOT Included — Confirm At Inquiry) |
| High Light: | Engine Piston Kit MAZDA WL 2.5D,93mm STD Alfin Piston Kit,Piston Kit Compression Height 47.8mm |
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Product Description
WLY3-11-SAO / WLY3-11-SA0C Engine Piston Kit — a verified replacement for MAZDA WL, WL-T, and WL5 (2.5L diesel) engine families. 93.00 mm STD bore, 32.00 mm pin, Alfin insert, with two compression-height options (47.8 mm / 51.7 mm) to confirm at order.
Product Description
The Engine Piston Kit with OEM reference WLY3-11-SAO / WLY3-11-SA0C is a verified replacement for MAZDA WL, WL-T, and WL5 (2.5L diesel) engine families. This piston kit is a critical reciprocating assembly component responsible for converting combustion pressure into crankshaft rotation and managing thermal load within the cylinder. The WL series is a 2,499 cc inline-4 SOHC diesel engine with a 93.0 mm bore and 92.0 mm stroke, widely used across MAZDA Bongo Brawny / Friendee, Titan, B-Series (B2500), BT-50, and Ford Courier / Ranger platforms from the mid-1990s through the 2000s.
Verifiable Technical Signals (2025)
- Bore & Pin Verified: 93.00 mm (STD), pin diameter 32.00 mm — confirmed across MAG Engines, Modern Auto Parts, and Malliris technical data for the WL / WL-T platform.
- Compression Height Split Verified: 47.80 mm for WL/WL-T 12V applications; 51.70 mm for BT-50 WLAT 16V / CRDi variants — confirmed by independent supplier and TecDoc-sourced data.
- Ring Groove Widths Verified: 2.5 / 2.0 / 3.0 mm (Top / Second / Oil) — confirmed by MAG Engines and Goetze ring kit data for WL-T.
- OEM Cross-Reference Verified: Replaces WLY3-11-SAO, WLY3-11-SA0C, WLY3-11-SA0B, WLY5-11-SAOB, WLY1-11-SAOA, WLY8-11-SAOB, W5Y8-11-SAOD, plus 4355446 / 4355447 on the Ford side. Common trade cross-references include 42186, 42186STD, 42186A050, WL01-23-201A.
- Multi-Platform Application Verified: Confirmed compatible with MAZDA Bongo Brawny / Friendee, Titan, B-Series / B2500, BT-50, MPV, Proceed, and Ford Courier / Ranger 2.5TD (WL/WL-T).
Failure Symptoms — When to Replace
- Loss of compression / hard starting: Worn piston rings and skirt clearance reduce cranking pressure, especially noticeable on high-mileage WL-T turbo diesel engines.
- Blue / white exhaust smoke: Oil passing rings or incomplete combustion — piston and ring replacement is the standard correction when cylinder bores are within specification.
- Increased oil consumption: Glazed bores or collapsed ring packs allow oil into the combustion chamber, raising operating cost on commercial vans and pickups.
- Piston slap / cold-start rattle: Worn skirt-to-bore clearance causes a characteristic knocking when cold, diminishing as the engine warms.
- Scoring or scuffing on piston skirt: Visible vertical marks on the skirt or cylinder wall indicate inadequate lubrication, overheating, or excessive clearance — requires replacement before further operation.
Specifications
| Part Number | WLY3-11-SAO / WLY3-11-SA0C |
|---|---|
| Product Name | Piston |
| Car Model | MAZDA Bongo Brawny, Titan, B-Series, BT-50; Ford Courier, Ranger |
| Engine Model | MAZDA WL / WL-T / WL5 2.5D |
| Condition | 100% Brand New |
| Size | Standard (93.00 mm STD) |
| Weight | Standard |
| Origin | China Mainland |
| Main Market | Middle East, Asia, Africa, South America, North America & Europe |
| Package | Neutral Packing or Made as Requested |
| Material | High-strength aluminum alloy & precision bearings |
| Cooling Type | Engine coolant circulation |
| Installation | Direct OEM replacement |
| Quality Standard | OEM equivalent / ISO quality control |
Vehicle & Engine Compatibility
Primary Applications
| Brand | Model / Series | Engine | Notes |
|---|---|---|---|
| MAZDA | Bongo Brawny / Friendee | WL / WL-T | 2.5D / 2.5TD, core application |
| MAZDA | Titan | WL | Light truck application |
| MAZDA | B-Series / B2500 | WL / WL-T | 1997–2006, incl. 4WD variants |
| MAZDA | BT-50 | WLAT (16V) | 51.7 mm compression height version required |
| MAZDA | MPV / Proceed | WL / WL-T | Non-US 1995+ applications |
| FORD | Courier 2500TD | WL-T | 1997–2000 |
| FORD | Ranger 2500TD Hi-T | WL-T | 2000–2006 |
⚠️ Important Fitment Notes:
- Compression height is the one non-negotiable selection parameter: 47.8 mm and 51.7 mm pistons look similar, but installing the wrong one causes severe deviation in valve clearance, compression ratio, and combustion chamber volume. Please provide the measured compression height of the original piston or the engine code (WL / WL-T / WLAT).
- Piston rings must be confirmed separately: Some suppliers sell "piston kits" without rings, others include them. Common WL-T ring set references include WLY1-11-SC0A, 30175, RRK61704A. Confirm whether rings are included at order.
- STD vs +0.50: Engines with bore wear beyond specification require 93.50 mm (+0.50) pistons, with corresponding boring / honing.
- WL5 vs WL/WL-T relationship: WL5 is a variant of the WL series with largely interchangeable piston interfaces, but final confirmation should always be made using the original part number or measured dimensions — never by engine code alone.
Features & Benefits
| Feature | Benefit + Verification Signal |
|---|---|
| Alfin insert (variant-dependent) | Reinforces the top ring groove against thermal fatigue in turbocharged WL-T applications — confirmed by multiple WL piston listings specifying Alfin construction. |
| Two compression-height options | Covers both older WL/WL-T 12V platforms (47.8 mm) and later BT-50 WLAT 16V applications (51.7 mm) — reducing mis-fit risk when the correct version is selected. |
| 93.00 mm STD bore, 32.00 mm pin | Matches the WL family's factory reciprocating dimensions — verified across independent technical sheets. |
| Precision ring grooves (2.5 / 2.0 / 3.0 mm) | Ensures correct ring seating and oil control when paired with a quality ring set — verified by Goetze WL-T ring kit specifications. |
| 4-cylinder kit availability | Supplied as a complete set for one engine refresh, reducing mismatch between cylinders — confirm kit contents (pin / circlips / rings) at inquiry. |
| Broad Mazda–Ford cross-platform coverage | One reference family covers Bongo, Titan, B-Series, BT-50, Courier, and Ranger — simplifying sourcing for mixed-fleet distributors. |
Quality Control & Verification
| QC Item | Verification Method |
|---|---|
| Piston diameter / ovality | CMM or precision micrometer against 93.00 mm STD |
| Compression height | Height gauge — critical for 47.8 vs 51.7 mm differentiation |
| Pin bore diameter / concentricity | Bore gauge, 32.00 mm nominal |
| Ring groove width | Go/no-go gauge, 2.5 / 2.0 / 3.0 mm |
| Material / hardness | Spectrometer and hardness testing (supplier-dependent) |
| Surface / skirt condition | Visual inspection for scoring, coating integrity, handling marks |
| Kit completeness | Count and match pistons, pins, circlips per set |
Each kit is inspected before packing. Manufacturing standards vary by supplier; ISO/TS16949 certification should be confirmed at inquiry if required for your market.
Installation & Maintenance Recommendations
⚠️ IMPORTANT: Engine rebuild requires professional machining and assembly expertise. Confirm compression height and bore size against the original piston BEFORE installation. Installing the wrong compression-height piston can cause valve contact or compression ratio errors.
Installation Guidelines (Reference Only)
- Confirm compression height: Measure the original piston (47.8 mm or 51.7 mm) and match the new piston exactly. Do not rely on the OEM reference alone.
- Measure bore: Confirm cylinder bore is within STD specification (93.00 mm) before using STD pistons; otherwise bore/hone to +0.50 mm and use oversize pistons.
- Check ring end gap: Fit rings to the bore and verify end gap against the WL workshop manual before assembly.
- Install pin & circlips: Lubricate pin bore, fit pin (32.00 mm), and seat new circlips fully.
- Stagger ring gaps: Position ring end gaps at 120° intervals if rings are fitted by the installer.
- Lubricate and install: Coat skirt and rings with clean engine oil; use a ring compressor for insertion.
- Torque to specification: Follow the WL / WL-T workshop manual for connecting rod and cylinder head torque values.
Maintenance Schedule
- Oil change: Every 5,000–10,000 km depending on duty cycle; use diesel-rated oil appropriate for the era and turbocharging status.
- Compression / blow-by check: At every 50,000 km or if smoke or hard starting develops.
- Cooling system: WL-series engines are sensitive to overheating; maintain coolant condition and thermostat function to protect piston-to-bore clearance.
- Turbo (WL-T): Monitor boost and EGT; excessive heat accelerates piston crown and ring groove degradation.
Packaging & Supply
- Standard packing: Neutral carton, piston protected with wrap; wooden pallet for bulk export.
- Kit options: Piston only, piston + pin + circlips, or full kit with rings (confirm at inquiry). Specify 47.8 mm or 51.7 mm compression height and STD or +0.50 mm.
- Suitable for: Engine rebuild workshops, Mazda/Ford commercial fleet maintenance, diesel parts distributors, and export wholesalers.
- Related parts available: Ring set (WLY1-11-SC0A / 30175 / RRK61704A style references), cylinder liner kits, head gaskets, and full WL / WL-T overhaul kits.
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