The 491Q / Toyota 4Y-type 2.237L gasoline long block is intended for replacement and rebuilding projects where the original engine uses the matching 491Q-family architecture. The assembly combines the cylinder block, rotating assembly, cylinder head, valvetrain, valve cover, front timing cover and oil pan. Because 491Q, 491QE, GW491 and related 4Y-derived variants differ by vehicle and market, every order should be checked against the original engine and visible configuration.
Key Features
- 491Q / 4Y-derived inline four-cylinder gasoline engine architecture
- 2.237L displacement with 91 mm bore and 86 mm stroke
- Water-cooled, four-stroke long block assembly
- Supplied with cylinder head, valvetrain, valve cover, timing cover and oil pan
- Suitable for selected commercial-vehicle replacement and rebuilding applications
- Configuration verification available before quotation and production
Technical Specifications
| Engine code | 491Q / 4Y-type |
|---|---|
| Product type | Long block engine |
| Fuel type | Gasoline |
| Configuration | Inline four-cylinder, four-stroke, water-cooled |
| Displacement | 2.237 L |
| Bore × stroke | 91 × 86 mm |
| Compression ratio | Typically 8.8:1; verify the exact engine suffix and application |
| Firing order | 1-3-4-2 |
| Power and torque | Application-specific; confirm the required engine version and calibration |
Vehicle Applications
| Application group | Fitment guidance |
|---|---|
| Xinchen 491Q applications | Selected vehicles originally equipped with the matching 491Q engine configuration. |
| Jinbei Hiace-family vans | Selected Chinese-market vans and light commercial vehicles; verify the complete engine code and port layout. |
| Great Wall and Foton | Selected light commercial vehicles using a compatible 491Q / 4Y-derived gasoline engine. |
| Toyota 4Y-family applications | Some Hiace and Hilux applications may share the basic layout, but direct interchangeability must be confirmed from the original engine. |
What Is Included
- Assembled cylinder block and rotating assembly
- Cylinder head and valvetrain assembly
- Valve cover
- Front timing cover
- Oil pan
Components That May Vary
Intake and exhaust manifolds, carburetor or EFI components, ignition and emissions equipment, sensors, wiring, starter, alternator, fan, accessory drive, flywheel or flexplate, mounts, brackets and hoses are quotation-dependent. Port arrangement, timing cover, oil pan and flywheel interface must match the original engine.
Fitment Verification
Before ordering, please provide the VIN or chassis number, vehicle make and model, model year, sales market, complete original engine code including suffix, and clear photos of both engine sides, cylinder-head ports, timing cover, oil pan, flywheel interface and mounts. Vehicle model and year alone do not guarantee direct fitment.
Factory Supply & Custom Service
Yuan Yi is an integrated manufacturer and exporter with more than 20 years of engine machining and manufacturing experience. We support distributors, repair networks, fleets and engine rebuilders with configuration review, production coordination and export supply. Send your engine details and required quantity for a fitment check and quotation.
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