275350 275326 Piston Ring Kit for Volvo Penta AD30A AD31A AD40B AD41A AQAD30A AQAD31A AQAD40A AQAD41A MD30A MD31A MD40A TAMD30A TAMD31A TAMD40A TAMD41A TMD30A TMD31A TMD40A TMD41A | JLM Marine

Piston Ring Kit – Fits Volvo Penta AD30A, AD31A, AD40B, AD41A, AQAD30A, AQAD31A, AQAD40A, AQAD41A, MD30A, MD31A, MD40A, TAMD30A, TAMD31A, TAMD40A, TAMD41A, TMD30A, TMD31A, TMD40A, TMD41A

This piston ring kit is engineered for a wide range of Volvo Penta marine diesel engines, including the AD30A, AD31A, AD40B, AD41A, AQAD30A, AQAD31A, AQAD40A, AQAD41A, MD30A, MD31A, MD40A, TAMD30A, TAMD31A, TAMD40A, TAMD41A, TMD30A, TMD31A, TMD40A, and TMD41A series. It provides a direct replacement solution for maintaining optimal compression and engine performance.

This kit directly replaces Volvo Penta part numbers 275350 and 275326, as well as aftermarket equivalents from Crom Marine (111293) and Orbitrade (ORB30350), ensuring broad compatibility across multiple sourcing channels.

• Standard size (STD) piston rings with dimensions 2.3 × 2.5 × 4.0 mm
• Designed for Volvo Penta diesel marine engines across AD, AQAD, AQD, MD, TAMD, TD, and TMD families
• Direct-fit replacement for OEM and aftermarket part numbers

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

Compatible Engine Models

Confirm your engine model/year in the table below.

Technical Specifications

Package Contents

This package includes a complete piston ring kit for Volvo Penta marine diesel engines. The kit contains all necessary rings for proper installation and restoration of engine compression.

Installation Guide

1. Disconnect the battery and ensure the engine is cool before beginning work.
2. Remove the cylinder head and carefully extract the pistons from the engine block.
3. Use a ring expander tool to remove old piston rings from each piston. Inspect piston grooves for wear or damage.
4. Clean all piston ring grooves thoroughly with a ring groove cleaner to remove carbon deposits.
5. Check the end gap of each new ring by inserting it into the cylinder bore and measuring with a feeler gauge.
6. Install the new rings starting with the bottom oil ring, then the middle compression ring, and finally the top compression ring.
7. Use a ring compressor tool to carefully compress the rings and insert the piston assembly back into the cylinder bore.
8. Ensure ring gaps are staggered around the piston (typically 120° apart) to prevent blow-by.
9. Reinstall the cylinder head following manufacturer torque specifications and tightening sequence.
10. Reconnect all components, refill fluids, and prime the lubrication system before starting.
11. Start the engine and allow it to idle, monitoring for unusual noises or excessive smoke during break-in.
12. Perform a compression test after break-in to verify proper ring seating and cylinder seal.

Troubleshooting & FAQ

Q: How do I confirm this piston ring kit fits my Volvo Penta engine?
A: Verify your engine model against the compatibility table above. Cross-check the OEM part numbers (275350 or 275326) with your engine's service manual or parts diagram to ensure correct fitment.

Q: What size are these piston rings and how do I know if I need oversized rings?
A: This kit includes standard (STD) size rings with dimensions 2.3 × 2.5 × 4.0 mm. If your cylinders have been bored or honed beyond standard tolerances, you will need oversized rings, which are sold separately.

Q: How often should I replace piston rings on my Volvo Penta diesel engine?
A: Replacement intervals depend on operating conditions and maintenance. Common signs include excessive oil consumption, blue exhaust smoke, low compression readings, or reduced engine performance. Inspect during scheduled overhauls or when compression loss is detected.

Q: What are the signs that my piston rings are failing?
A: Typical symptoms include increased oil consumption, blue or gray exhaust smoke (especially during acceleration), loss of power, rough idle, and poor fuel economy. A compression test can confirm worn or damaged rings.

Q: Can I install these rings without removing the engine from the boat?
A: Yes, in-frame installation is possible on many Volvo Penta models by removing the cylinder head and oil pan. However, this requires specialized tools and experience; professional installation is recommended for best results.

Q: Is this an OEM or aftermarket piston ring kit?
A: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.

Q: How fast do you ship and how much does it cost?
A: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.

Q: What is your warranty and return policy?
A: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.

Important Notes

• Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
• This product is an aftermarket replacement part and is not an OEM component.
• Professional installation is recommended to ensure safety and optimal performance.

Why Choose JLM MARINE?

• Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
• Fast Global Shipping: Free delivery worldwide in 5–15 days.
• Direct from Manufacturer: Competitive pricing without compromising quality.