Mercedes-Benz W204 C-Class Valve Cover Removal

The valve covers on the C350 have no gasket between the cover and the head. There is only a thin film of sealant used to seal up the top of the motor. The cover is also used to hold the cams in place and incorporate the journal for the cams. The covers are also not interchangeable with other heads so if you damage it while working on it you need to replace the head as well as the cover. For this reason USE great care!

The procedures for replacing the left and right side are very similar but do have a few differences that are pointed out below. You have to move different accessories out of the way depending on whether you are working on the right or left side.

If you remove the left valve cover you are going to be disconnecting the fuel line so the first step is to prep the car. I like to tell people to pull the fuel pump relay and then try to start the car. The car will turn over and then die. Do this about 2-3 times - it will help drain excess fuel out of your system. Also open the gas cap to help depressurize the system. Then, make sure that the car has cooled down; you don't want to be working with gasoline when the car is hot.

Have a fire extinguisher handy. There will be some spillage of fuel as it's nearly impossible to prevent. Also, wear chemical resistant gloves if you don't want to get any gasoline on your hands. Make sure that you have plenty of paper towels or rags to help you clean up. Perform the injector removal in a clear, open, and well-ventilated space. It may not hurt to have an assistant around in case there are any problems.

Again, the covers are also not interchangeable with other heads. If you damage it while working on it you cannot order a replacement cover and need to replace the head as well as the cover. Be very careful!

Read the Full Article: https://www.pelicanparts.com/techarti...

Time: 4 hours
Tab: $20
Tools: T30, T25 Torx, E10 Torx :https://www.pelicanparts.com/Mercedes..., 17mm wrench :https://www.pelicanparts.com/Mercedes...
Applicable Models: :https://www.pelicanparts.com/catalog/...
Mercedes-Benz C350 (2008-14)
Mercedes-Benz GLK350 (2010-14)
Parts Required: Sealant:https://www.pelicanparts.com/cgi-bin/...
Hot Tip: Clean around the covers before removing
Performance Gain: No oil leaks
Complementary Modification: Replace worn out hoses