Check Cylinders For Leaks - AR01.00-P-1300MFD
WARNING: This page does not describe the selected car, but rather 12 other vehicles, including the 2023 Mercedes-Benz CLA45 AMG, 2023 Mercedes-Benz CLA35 AMG, 2023 Mercedes-Benz CLA250, 2022 Mercedes-Benz CLA45 AMG, and 2022 Mercedes-Benz CLA35 AMG. However, it is still accessible from the selected car via links, so may be relevant.
Engine 260, 282 in model 118, 177, 247
Shown on model 177 with Engine 282
Shown on model 177 with Engine 282
| 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 | |
| Risk of injury. Skin or eye injuries may result when handling hot or glowing objects. | Wear protective gloves, protective clothing and safety glasses, if necessary. | AS00.00-Z-0002-01A | |
| Topical note | Notes on avoiding damage through contamination and foreign objects | AH00.00-P-5000-01A | |
| Remove | |||
| Risk of accident from vehicle starting off by itself when Engine running. Risk of injury (bruises and burns) resulting from working on the Engine while it is being started or when it is running. | Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts. | AS00.00-Z-0005-01A | |
| Risk of burn injuries, suffocation and poisoning when working on the exhaust system and the components connected to it. Risk of suffocation and risk of poisoning caused by inhalation of gaseous and solid components of the exhaust. Risk of poisoning caused by skin contact with solid components of the exhaust. | Wear protective clothing and safety glasses. Use the extraction system. Move people out of the hazard area. | AS49.00-Z-0001-01A | |
| 1 | Warm up Engine to normal operating temperature and switch it off. | ||
| Risk of injury to skin and eyes suffering scalding from contact with hot coolantspray. Risk of poisoning from swallowing coolant. | Do not open cooling system unless coolant temperature is below 90°C. Open cap slowly and release the pressure. Do not pour coolant into beverage containers. Wear protective gloves, protective clothing and safety glasses. |
AS20.00-Z-0001-01A | |
| 2 | Turn cap (3) of the coolant expansion reservoir counterclockwise, release overpressure, and then unscrew cap. | ||
| 3 | Remove spark plugs. | ||
| Engine 260 in model 118, 177, 247 | AP15.10-P-1580F | ||
| Engine 282 in model 118, 177, 247 | AP15.10-P-1580I | ||
| 4 | Unscrew cap (2) of the filler neck. | ||
| 5 | Remove front section of the front right fender liner. | AR88.10-P-1301MFA | |
| Check | |||
| 6 | Screw adapter into the spark plug bore of the cylinder to be checked. | Fig 2 | |
| 7 | Connect dead center locator to the adapter. | Dead center locator |
Fig 2 |
| 8 | Crank Engine at center bolt (4) of crankshaft belt pulley (5) in direction of Engine rotation. Position piston of cylinder to be checked by means of TDC detection device to top dead center (TDC). | Dead center locator |
|
| 9 | Operate parking brake. | ||
| 10 | Bring transmission into park position. | ||
| 11 | Disconnect top dead center locator from adapter. | Dead center locator |
|
| Fig 2 | |||
| 12 | Connect compressed-air hose to pressure loss tester (1). | Fig 1 | |
| 13 | Connect pressure loss tester (1) to adapter. | Fig 1 | |
| Fig 2 | |||
| 14 | Apply compressed air to the cylinder to be checked and read off pressure loss at pressure loss tester (1). | Cylinder leakage: permissible loss total indication | *BE01.00-P-1001-02Z |
If an increased pressure loss was detected, ↓ Determine cause. |
Fig 1 | ||
| 15 | Remove pressure loss tester (1) from adapter. | Fig 1 | |
| Fig 2 | |||
| 16 | Remove adapter from the spark plug bore of the last checked cylinder. | Fig 2 | |
| 17 | Perform check process in cylinder order on remaining cylinders in same manner. | ||
| Install | |||
| 18 | Install front section of the front right fender liner. | AR88.10-P-1301MFA | |
| 19 | Screw cap (2) onto filler neck. | ||
| 20 | Install spark plugs. | ||
| Engine 260 in model 118, 177, 247 | AP15.10-P-1580F | ||
| Engine 282 in model 118, 177, 247 | AP15.10-P-1580I | ||
| 21 | Tighten cap (3) of the coolant expansion reservoir. |
CYLINDER LEAKAGE
| Number | Designation | Engine all (4xWD, CAR, smart) | |
|---|---|---|---|
| BE01.00-P-1001-02Z | Cylinder leakage: permissible loss total indication | % | ≤ 25 |