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BBTV 2C4181 Engine Piston Ring
| Brand | BBTV 2C4181 |
|---|---|
| 1st Oil Groove | 2.00 |
| 1st Oil Ring Material | Steel rail/stainless exp |
| 1st Oil Ring Surface Treatment | Chrome |
| 2nd Groove | 1.50 |
| 2nd Ring Surface Treatment | Phosphate |
| Cylinder Quantity | 4 |
| 2nd Ring Material | Grey iron |
| Top Ring Material | Steel |
| Engborein | 3.031 |
| Engboremetric | 77.00 |
| Oversize | Std |
| Top Groove | 1.20 |
| Top Ring Surface Treatment | Chrome |
| Fits | BMW and Mini · 15 vehicles |
Standard bore. 77.00 mm sizing for correct piston and cylinder matching.
Chrome top ring. Surface treatment helps improve wear resistance in service.
Steel and grey iron. Material mix supports sealing and oil control performance.
Cross-references 08-444800-00 and 081RS001040N0 for the same application. See all 2.
Will it fit your vehicle?
Free return shipping if it doesn't fit.
Engine Piston Ring Set Overview
This engine piston ring set is built for standard-bore applications with a 77.00 mm bore and chrome-treated top ring surfaces. It is a direct fit for select Mini Cooper and BMW 118i applications, including 2006-2016 Mini Cooper and 2012-2015 BMW 118i listings shown in the fitment data.
Key Features
- Standard size with a 3.031 in. / 77.00 mm engine bore
- Chrome top ring surface treatment for improved wear resistance
- Grey iron second ring for stable sealing performance
- Steel top ring construction for durability under combustion load
- Steel rail and stainless expander oil ring design
Detailed Description
Part number 2C4181 is an engine piston ring set for 4-cylinder applications using a standard bore. The ring package includes a chrome top ring, grey iron second ring, and a steel rail/stainless expander oil ring arrangement, with groove dimensions listed at 1.20 mm for the top ring, 1.50 mm for the second ring, and 2.00 mm for the oil ring. These specifications matter when matching the ring set to the correct piston and cylinder dimensions in Mini Cooper and BMW 118i engines. Part number 2C4181 is listed for multiple model years, so confirming bore size and groove dimensions before installation is essential.
What It Is Used For
- Restoring cylinder sealing when compression has dropped
- Reducing oil control issues caused by worn ring packs
- Addressing excessive blow-by from worn piston rings
- Replacing rings during an engine rebuild or refresh
- Matching standard-bore piston and cylinder specifications
Installation Notes and Tips
Verify the engine bore, piston groove widths, and ring end-gap requirements before assembly. This part cross-references Monroe Shocks & Struts (e.g., 08-444800-00, 081RS001040N0) for the same application. Confirm the fitment details for your Mini Cooper or BMW 118i engine before ordering, since the listed applications span multiple years and engine configurations.
Quality Assurance
Use the published bore, groove, and material specifications to confirm correct application before installation. Part number 2C4181 is cataloged with fitment data for select Mini Cooper and BMW 118i vehicles.
| Year | Make | Model | Liters | Cylinders | Fuel Type | Notes |
|---|---|---|---|---|---|---|
| 2016 | Mini | Cooper | 1.6L | L4 | — | — |
| 2015 | BMW | 118i | 1.6L | L4 | — | EngBoreIn:3.031;Top Groove:1.20 mm;2nd Groove:1.50 mm;1st Oil Groove:2.00 mm;Standard Size;Chrome Top Ring;4Cyl Ring Set; Top Ring Surface Treatment: Chrome |
| 2015 | Mini | Cooper | 1.6L | L4 | — | — |
| 2014 | BMW | 118i | 1.6L | L4 | — | EngBoreIn:3.031;Top Groove:1.20 mm;2nd Groove:1.50 mm;1st Oil Groove:2.00 mm;Standard Size;Chrome Top Ring;4Cyl Ring Set; Top Ring Surface Treatment: Chrome |
| 2014 | Mini | Cooper | 1.6L | L4 | — | — |
| 2013 | BMW | 118i | 1.6L | L4 | — | EngBoreIn:3.031;Top Groove:1.20 mm;2nd Groove:1.50 mm;1st Oil Groove:2.00 mm;Standard Size;Chrome Top Ring;4Cyl Ring Set; Top Ring Surface Treatment: Chrome |
| 2013 | Mini | Cooper | 1.6L | L4 | — | — |
| 2012 | BMW | 118i | 1.6L | L4 | — | EngBoreIn:3.031;Top Groove:1.20 mm;2nd Groove:1.50 mm;1st Oil Groove:2.00 mm;Standard Size;Chrome Top Ring;4Cyl Ring Set; Top Ring Surface Treatment: Chrome |
| 2012 | Mini | Cooper | 1.6L | L4 | — | — |
| 2011 | Mini | Cooper | 1.6L | L4 | GAS | EngBoreIn:3.031;Top Groove:1.20 mm;2nd Groove:1.50 mm;1st Oil Groove:2.00 mm;Standard Size;Chrome Top Ring;4Cyl Ring Set; Top Ring Surface Treatment: Chrome |
| 2010 | Mini | Cooper | 1.6L | L4 | — | — |
| 2009 | Mini | Cooper | 1.6L | L4 | — | — |
| 2008 | Mini | Cooper | 1.6L | L4 | — | — |
| 2007 | Mini | Cooper | 1.6L | L4 | GAS | EngBoreIn:3.031;Top Groove:1.20 mm;2nd Groove:1.50 mm;1st Oil Groove:2.00 mm;Standard Size;Chrome Top Ring;4Cyl Ring Set; Top Ring Surface Treatment: Chrome |
| 2006 | Mini | Cooper | 1.6L | L4 | GAS | EngBoreIn:3.031;Top Groove:1.20 mm;2nd Groove:1.50 mm;1st Oil Groove:2.00 mm;Standard Size;Chrome Top Ring;4Cyl Ring Set; Top Ring Surface Treatment: Chrome |
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