Womala Engine Piston Ring Kit 30750896 STD Piston Ring for Volvo XC60 Engine Auto Parts
The Engine Piston Ring Kit (STD Piston Ring, OE Number: 30750896) is a core component of the engine’s combustion chamber sealing system, primarily designed for Volvo XC60 (-17) and compatible with multiple Volvo models including S60 (11–/11–18), S80 (07–)/S80L, V60 (-18), V70 (08–), and XC70 (08–). As an OE-grade “STD” (standard size) kit, it includes three types of piston rings per cylinder: compression rings (top two) and an oil control ring (bottom). Installed in the grooves of the engine piston, its core role is to seal the gap between the piston and cylinder wall—ensuring efficient combustion, preventing gas leakage, and controlling oil consumption.
Constructed from high-strength materials tailored to each ring’s function:
- Compression rings: Made of wear-resistant cast iron or steel alloy with a chrome or molybdenum coating, to withstand high combustion pressure (up to 100+ bar) and temperatures (up to 600°C).
- Oil control ring: Typically a three-piece design (two scraper rings + one expander) made of flexible steel, to scrape excess oil from the cylinder wall back to the oil pan while preventing oil from entering the combustion chamber.
The kit adheres to Volvo’s strict dimensional standards, ensuring a precise “standard” fit for undamaged, non-overbored cylinders—avoiding excessive clearance that would cause pressure loss or oil burning.
Core Functions
- Combustion Gas Sealing: The top two compression rings block high-pressure combustion gases from leaking into the crankcase. This maintains maximum cylinder pressure, ensuring efficient power output and preventing fuel waste (leaked gas reduces combustion efficiency).
- Oil Control: The bottom oil control ring scrapes excess engine oil from the cylinder wall during piston upward movement, returning it to the oil pan. This prevents oil from being drawn into the combustion chamber (which causes “oil burning,” blue exhaust smoke, and increased oil consumption) while keeping the cylinder wall lubricated to reduce wear.
- Heat Transfer: The piston rings conduct part of the piston’s heat (absorbed from combustion) to the cylinder wall, which then dissipates it via the engine cooling system. This prevents the piston from overheating and maintains its structural integrity.
Compatible Vehicles
This Engine Piston Ring Kit (OE: 30750896, STD size) is tailored for the following Volvo models and their respective year ranges:
| Model | Applicable Year Range |
| Volvo XC60 (-17) | 2009–2016 |
| Volvo S60 (11–/11–18) | 2011–2016 |
| Volvo S80 (07–) / S80L | 2008–2015 |
| Volvo V60 (-18) | 2011–2016 |
| Volvo V70 (08–) | 2008–2015 |
| Volvo XC70 (08–) | 2009–2015 |
Notes:
- “STD” (standard) size means this kit is only for cylinders with original factory dimensions—it cannot be used for overbored cylinders (which require “oversize” piston rings, e.g., +0.25mm, +0.50mm). Confirm cylinder bore size via a micrometer before installation.
- Piston ring kits are engine-specific (e.g., 2.0L turbo vs. 3.0L inline-6) even for the same model. Verify compatibility with your vehicle’s engine displacement via its VIN (Vehicle Identification Number) or consult Volvo’s official service manual.
Frequently Asked Questions
Q: How to determine if the bumper bracket needs replacement?
A: Signs of a failing bumper bracket include visible damage or deformation, misaligned bumper panels, unusual noises from the front end, or if the bumper appears loose or sagging on one side.
Q: What should be paid attention to when replacing the bumper bracket?
A: For optimal results, we recommend professional installation. Key considerations include ensuring proper alignment of all mounting points, checking for additional damaged components, and verifying all fasteners are properly torqued to specification.
Why Choose Our Products
- Extensive Industry Experience: 13 years specializing in Volvo auto parts with precise product matching and technical solutions.
- Quality Assurance: 10-stage quality inspection process including durability testing, surface roughness analysis, and dimensional verification.
- Manufacturing Excellence: 15,000㎡ production base with 10,000+ SKUs in inventory for fast order fulfillment.
- Strategic Partnerships: Collaborations with 50+ factories including suppliers to international brands like Bosch and Hella.
