Adjusting the valves on a Mercedes Benz GLK Class X204 220 4MATIC is a delicate procedure that requires specific tools and a methodical approach. click here for more details on the download manual…..

Mercedes-Benz GLK X204 3.5L V6 Sound Design + Custom Exhaust 2012 Mercedes-Benz GLK 300 (350) X204 3.5 L. V6 M276 Petrol engine (249hp/340nm stock) Tunes: Factory firmware …

2011 Mercedes GLK 350 X204 4Matic – Upper (large) Control Arm Replacement – covers RWD variant to… In this video I show you how to swap out your “upper control arms” (also known as torque struts, compliance bushing / arms, etc.).

Here’s a detailed guide to the tools needed and the steps involved:

### Tools Required

– **Socket Set**: A complete socket set including metric sizes is essential for removing various engine components.
– **Torque Wrench**: Used to ensure that bolts are tightened to the manufacturer’s specifications, preventing over-tightening.
– **Feeler Gauges**: A set of feeler gauges is critical for measuring the gap between the valve and the rocker arm to ensure proper clearance.
– **Engine Oil**: Necessary for lubricating components during reassembly and ensuring proper operation.
– **Pliers**: For gripping and manipulating small components.
– **Ratchet and Extensions**: To reach bolts that are in tight spaces.
– **Screwdrivers**: A set of Phillips and flathead screwdrivers for removing covers and other components.
– **Valve Adjustment Tool (if required)**: Depending on the model, some may require specific tools to adjust the valves.
– **Magnetic Tray**: To keep small bolts and nuts organized and prevent losing them during the procedure.
– **Service Manual**: A repair manual specific to the GLK Class X204 can provide torque specifications and detailed diagrams.

### Procedure

– **Preparation**:
– Ensure the engine is cool to prevent burns and to allow metal parts to contract for easier adjustments.
– Disconnect the negative battery terminal to prevent any electrical issues during the process.

– **Remove Engine Cover**:
– Use a socket set to remove the bolts securing the engine cover.
– Gently lift the cover off and set it aside, taking care not to damage any connectors.

– **Access the Valve Train**:
– Remove any additional components blocking access to the cylinder head, such as air intake components or the throttle body, using the appropriate sockets and screwdrivers.
– Take note of where each component goes for easier reassembly.

– **Turn Engine to TDC**:
– Rotate the engine using a ratchet on the crankshaft pulley until the first cylinder is at Top Dead Center (TDC) on the compression stroke. You can verify this through the timing marks on the pulley and engine block.

– **Check Valve Clearance**:
– Use feeler gauges to check the clearance between the valve and the rocker arm. Refer to the specifications in the service manual for the correct clearance measurements.
– Insert the correct thickness feeler gauge into the gap and check for resistance; it should slide in with slight friction.

– **Adjust Valves**:
– If the clearance is not within specification, you will need to adjust it. This usually involves loosening the locking nut on the rocker arm using a wrench and then turning the adjusting screw to achieve the correct clearance.
– Tighten the locking nut while holding the adjusting screw in place to ensure the setting does not change during tightening.

– **Repeat for Other Cylinders**:
– Move to the next cylinder and repeat the checking and adjusting process. Ensure to always check the specific cylinder at TDC.

– **Reassemble Components**:
– Once all valves are adjusted, carefully reassemble any components you removed earlier in reverse order.
– Make sure to tighten all bolts to the correct torque specifications as outlined in the service manual.

– **Reconnect Battery**:
– Reconnect the negative battery terminal.

– **Start Engine**:
– start the engine and listen for any unusual noises. Allow the engine to reach operating temperature and check for any leaks or irregular sounds.

– **Final Inspection**:
– After the engine has run for a while, recheck the valve adjustments if necessary, and ensure everything is functioning properly.

### Important Notes

– Always refer to the specific service manual for your vehicle model for precise torque specifications and adjustments.
– If you are not experienced with engine work, consider seeking assistance from a certified mechanic as incorrect adjustments can lead to engine damage.
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