315791 S3B Turbocharger Core for Volvo Penta TWD1030

This aftermarket replacement turbocharger core, part number 315791, is designed for S3B turbochargers used in Volvo Penta TWD1030 engines. It serves as an aftermarket replacement for the central rotating assembly (CHRA), helping restore turbocharger function. Verify your specific engine code and turbo model before ordering to ensure proper fitment and application alignment.

Key Specifications

This S3B turbocharger core, part number 315791, is supplied as a standalone central rotating assembly (CHRA). The unit weighs approximately 7 kg gross, reflecting the mass of the shaft, bearings, and compressor/turbine wheels. It is designed for rebuilders and shops replacing worn bearings or damaged shafts in S3B housings. Verify that your existing housing and actuator are in good condition before ordering this core. This component does not include external housings or actuators.

Application & Compatibility

Source application path clues for buyer verification. These are source category/application paths, not confirmed fitment claims:

• VOLVO > VOLVO PENTA > VOLVO TWD1030

This S3B turbo core is listed as a reference replacement for Volvo Penta TWD1030 engines. The application path indicates use in Volvo marine powertrains, but engine codes and turbo configurations vary by model year. Verify your specific engine serial number and existing turbo part number before ordering. This core is intended for rebuilders replacing worn CHRA components within existing S3B housings. Confirm that your compressor and turbine housings are undamaged and suitable for reuse with this replacement core.

Technical Notes

The S3B core assembly relies on precise bearing clearances and shaft alignment for stable operation. Inspect the compressor and turbine wheels for radial play or axial movement before installation. Ensure the shaft rotates freely without binding or unusual noise. Check the oil seal surfaces for scoring or damage that could compromise the seal. Proper lubrication is critical; verify that oil supply lines are clean and unobstructed. Contaminated oil can rapidly damage new bearings. Confirm that the housing bores are clean and free of debris to prevent premature wear during operation.

B2B Supply

LeadTurbo supports B2B buyers with volume pricing and worldwide shipping for the 315791 S3B turbo core. Technical fitment support is available to help verify engine codes and turbo configurations before ordering. Contact our team for bulk order details and lead times. We assist repair shops and distributors in confirming part numbers against specific Volvo Penta TWD1030 applications to ensure accurate replacement planning.