The 8944552401 4JA1 Crankshaft is designed for the Isuzu D-max 2.5L Pickup equipped with the 4JA1 engine. Always verify your vehicle's engine code and part number before purchasing.
The product is listed with EM No/Model 8944552401 4JA1. To confirm OEM status or exact interchange, check with the parts supplier or your vehicle dealer.
The product description states it is a crankshaft built to high-quality standards. For specific metallurgy (forged, billet, or cast steel) contact the seller or manufacturer.
This crankshaft is engineered for durability and smooth operation. While it restores proper engine function and reliability in a rebuild or repair, performance gains depend on the overall engine build and supporting components.
Installation requires engine disassembly, precise clearances, bearing installation, and correct torque sequencing. Professional installation or a qualified mechanic is recommended unless you have engine rebuild experience.
Yes. It's standard practice to replace main and rod bearings, seals, and possibly thrust washers. Machine work (grinding or polishing) may be required—follow your service manual and machinist recommendations.
The listing does not specify balance status. Proper dynamic balancing is critical; confirm with the seller whether it is balanced or if balancing is required prior to installation.
Specific torque values and bearing clearances are not provided in the product listing. Refer to the Isuzu factory service manual for the 4JA1 engine for exact specifications.
Yes. The 8944552401 4JA1 Crankshaft is listed as ideal for engine rebuilds and repairs for the Isuzu D-max 2.5L (4JA1) application.
Verify your engine code (4JA1), existing crankshaft part number, and consult your vehicle's parts catalog or supplier. Provide VIN and engine details to the seller if unsure.
Warranty and return policies are not specified in the product description. Check the seller or manufacturer's warranty, return window, and any core charge before purchase.
The listing does not mention a core charge. Some suppliers require a core return for crankshafts—confirm core policies with the seller prior to ordering.
This crankshaft is designed for stock 4JA1 applications. For high-performance or heavily modified engines, consult a performance engine builder to determine suitability or need for upgraded components.
Service life depends on installation quality, engine condition, maintenance, and operating conditions. Proper machining, bearing installation, and regular maintenance greatly influence longevity.
Inspect for shipping damage, straightness, surface finish on journals, correct part number, and absence of cracks. If possible, verify journal dimensions or have a machinist check before assembly.
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