Remove/Install Piston Rings - AR03.10-P-7311MRI
WARNING: This page is about a different car, the 2023 Mercedes-Benz GLC300, 2022 Mercedes-Benz GLC300, 2021 Mercedes-Benz GLC300, 2020 Mercedes-Benz GLC350e, and 2020 Mercedes-Benz GLC300. However, it is still accessible from the selected car via links, so may be relevant.
Engine 264 in model 205, 253
| Risk of injury to skin and eyes due to handling of engine oil. Risk of poisoning caused by swallowing engine oil | Wear protective gloves, protective clothing and safety glasses. Do not fill engine oil into beverage containers. |
AS18.00-Z-0001-01A | |
| Risk of injury caused by scraping or cutting body parts on sharp vehicle parts | Always wear protective gloves when working on or near sharp and non-deburred vehicle parts. Deburr repair panels. |
AS00.00-Z-0017-01A | |
| Notes on avoiding damage through contamination and foreign objects | AH00.00-P-5000-01A | ||
| Remove | |||
| 1 | Remove pistons (5). | AR03.10-P-7021MRI | |
| 2 | Measure side clearance of piston rings (6b, 6c). | Feeler gauge |
AR03.10-P-7311-01MRH |
| Piston ring vertical clearance | *BE03.10-P-1001-05L | ||
| 3 | Remove piston ring (plain compression ring) (6c) with pliers. | Fig 1 | |
| 4 | Remove piston ring (taper-faced hook scraper ring) (6b) with pliers. | Fig 1 | |
| 5 | Remove piston ring (oil scraper ring) (6a) by hand. | ||
| 6 | Clean piston rings (6a, 6b, 6c) and piston ring grooves. | Assembly cleaner | *BR00.45-Z-1028-04A |
| 7 | Check the crankcase, crankshaft, pistons, and connecting rods for damage and wear. | If damage or wear are present, ↓ Replace corresponding components. |
|
| 8 | Measure end gap of the piston rings (6a, 6b, 6c). | Feeler gauge |
AR03.10-P-7311-02MRH |
| Piston ring end gap | *BE03.10-P-1002-05L | ||
| 9 | Check piston rings (6a, 6b, 6c) for wear and replace if necessary. | Outside micrometer Dimension |
*BE03.10-P-1003-05L |
| Install | |||
| 10 | Install piston ring (oil scraper ring) (6a) by hand. | ||
| 11 | Install piston ring (taper-faced hook scraper ring) (6b) with pliers. | Fig 1 | |
| 12 | Install piston ring (plain compression ring) (6c) with pliers. | Observe installation position of piston ring (plain compression ring) (6c). The marking N must point toward the piston crown (5a). |
Fig 1 |
| 13 | Offset piston ring end gaps of the piston rings (6a, 6b, 6c) by 120° each on the circumference of the piston (5). | ||
| 14 | Install pistons (5). | AR03.10-P-7021MRI |
CHECK VALUES FOR PISTON RINGS
| Number | Designation | Engine 264.915 | Engine 264.920 | ||
|---|---|---|---|---|---|
| BE03.10-P-1001-05L | Piston ring vertical clearance | Groove 1 | mm | 0, 04...0, 08 | 0, 035...0, 075 |
| Groove 2 | mm | 0, 03...0, 07 | 0, 02...0, 06 | ||
| Groove 3 | mm | 0, 01...0, 18 | 0, 19...0, 31 | ||
CHECK VALUES FOR PISTON RINGS
| Number | Designation | Engine 264.915 | Engine 264.920 | ||
|---|---|---|---|---|---|
| BE03.10-P-1002-05L | Piston ring end gap | Groove 1 | mm | 0, 18...0, 28 | 0, 2...0, 3 |
| Groove 2 | mm | 0, 3...0, 5 | 0, 3...0, 5 | ||
| Groove 3 | mm | 0, 2...0, 7 | 0, 2...0, 7 | ||
CHECK VALUES FOR PISTON RINGS
| Number | Designation | Engine 264.915 | Engine 264.920 | ||
|---|---|---|---|---|---|
| BE03.10-P-1003-05L | Dimension | Plain compression ring | mm | 80, 4x1, 0x2, 75 | 83, 0x1, 2x3, 1 |
| Taper-faced hook scraper ring | mm | 80, 4x1, 0x2, 70 | 83, 0x1, 2x2, 9 | ||
| Oil scraper ring | mm | 80, 4x1, 5x2, 25 | 83, 0x2, 0x1, 9 | ||
REPAIR MATERIALS
| Number | Designation | Order number |
|---|---|---|
| BR00.45-Z-1028-04A | Assembly cleaner | A 000 986 56 01 |