This Isuzu 6WA1 forged steel crankshaft resolves common torsional fatigue and journal wear issues in 6WA1-TC engines. It replaces OEM 1-12310-439-0 for Giga heavy truck fleets. Wholesale ready.
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The Isuzu 6WA1 forged steel crankshaft (OEM: 1-12310-439-0) is a high-performance replacement designed for heavy-duty commercial engines.
It specifically addresses common pain points such as torsional vibration fatigue and journal scoring in Isuzu Giga and C-Series trucks, ensuring reliable power transmission under extreme loads.
Bulk wholesale stock available for immediate global export.
Restore the immense pulling power of your heavy-haulage fleet with a high-strength replacement Isuzu 6WA1 Crankshaft. Engineered for the massive 12.0L 6WA1 inline-six diesel engine, this component is the definitive repair solution for prime movers and dump trucks sidelined by crankshaft fracture, journal scoring, or high-mileage fatigue. A professional engine rebuild using this robust shaft ensures your heavy-duty vehicles return to the road with the durability required for long-haul logistics and construction sites.
This crankshaft is manufactured to honor Isuzu’s reputation as a “Commercial Vehicle Specialist” with deep expertise in heavy diesel powertrains. We utilize a premium forged steel construction, which is then precision-machined and induction hardened to withstand the extreme torque and combustion pressures of the 6WA1 and 6WA1-TC engines. It is the trusted choice for the Isuzu Giga series (C and E Series), providing fleet managers with a reliable, cost-effective alternative to OEM parts.
| Technical Feature | Detailed Specification |
|---|---|
| Engine Compatibility | Isuzu 6WA1, 6WA1-TC (6-Cylinder Diesel) |
| OEM Part Number | 1-12310-439-0 / 1123104390 / 1-12310-439-1 |
| Manufacturing Material | 42CrMo Forged Steel |
| Surface Treatment | Full Induction Hardening & Nitriding |
| Hardness Rating | HRC 55-62 |
| Primary Applications | Isuzu Giga Trucks, C-Series Trucks, Heavy Duty Gen-sets |
Ruich Value is your comprehensive source for heavy-duty Isuzu diesel engine crankshafts. From the massive 6W and 10P series to the medium-duty 6H series, we supply the durable core components your fleet depends on.
Category coverage: Isuzu 6WG1 & 6WF1 High-Output Cranks; 10PD1 & 10PE1 V10 Engine Shafts; 6HK1 & 6HE1 Series Crankshafts.
| Model | Model | Model | Model |
|---|---|---|---|
| 4HF1 | 4BG1 | 4ZD1 | 6BG1 |
| 4HG1T | 4FC1 | 4ZA1 | 6HE1 |
| 4HK1 | 4JA1 | 4ZB1 | 6HK1 |
| 4HE1T | 4JB1/4JB1T | 4BD1 | 6SD1 |
| 4BA1 | 4DA1 | 4JJ1 | 6WA1 |
| 4BC2 (DB33) | DH100 | G161 | 6WG1 |
| 4JG1 | C223 | 6BB1 (NEW) | 6HH1 |
| 4JG2 | C240 | 6BB1 (OLD) | 6QA1 |
| C190 | 600P | DB58 | 10PC1 |
| 4BB1A | 4ZE1 | 6BF1 | 10PB1 |
| 6BD1 | 10PE1 | 4BE1 | 12PD1 |
| 6SA1 | 10PD1 | 12PC1 |
Q1: Why is forged steel preferred over cast iron for the Isuzu 6WA1 engine?
A: The 6WA1 is a high-torque, heavy-duty engine used in long-haul trucks. Forged steel provides significantly higher tensile strength and fatigue resistance than cast iron, preventing the crankshaft from snapping under the extreme torsional stresses typical of 6WA1-TC turbocharged applications.
Q2: What are the torque specifications for 6WA1 main bearing bolts?
A: For the Isuzu 6WA1 engine, the main bearing cap bolts generally require a two-stage tightening process. Always refer to the specific workshop manual, but common practice involves an initial torque of 294 Nm (217 lb.ft). Proper lubrication of threads is essential for accurate clamping.
Q3: Does this crankshaft include the timing gear?
A: This is the crankshaft body. While we can provide the timing gear (OEM 1-12310-439-0 system) as an assembly for wholesale orders, most standard shipments are for the precision-machined crankshaft itself to allow for custom fleet configuration.
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