Tools: 4mm Allen head socket with ratchet and extension
Parts Required: Valve cover gasket
Performance Gain: Repair valve encompass leak
Complementary Modification:
While an engine runs combustion blow-past gases terminate upwardly in the crankcase.
This creates internal pressure in the crankcase. This combined with hot and common cold cycles of your engine equally you drive puts stress on gaskets and seals. Your valve embrace gaskets can dry out crack and leak oil. Mercedes Benz uses a soft composite cloth for their valve embrace gaskets. Information technology does last a long fourth dimension merely it can still dry out out and leak. This tin create a burning scent under the hood too equally reduce the engine oil level between oil changers. In this tech article we will go over all the necessary steps to remove your valve cover and replace your valve cover gaskets
In order to remove your valve cover gaskets yous will need to remove the engine cover/air filter housing and your spark plug wire covers. Come across our tech articles on removing engine covers and spark plug removal for these instructions.
Hot tip
Tag the spark plug wires to identify the cylinders
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Project Photos
Figure ane This photograph illustrates the correct side cylinder banking company. With the engine spark plug wire embrace removed pull out each spark plug wire and place them over the intake manifold. Come across our tech article on spark plugs removal for further instructions.
Figure ii On the right side cylinder toward the dorsum remove the ii iv mm Allen caput fasteners that hold a bracket that secures wiring to the valve encompass. We take flipped the subclass out of the fashion and moved the wiring over the dipstick tube. This volition requite united states of america more than room to remove the valve cover.
Effigy iii Remove the 9 four mm fasteners (green arrows) that hold downward the valve encompass. Make sure your Allen cardinal or socket is fully seated in the fastener before you try to remove it, these screws are easily stripped. There is one fastener that is longer than the other end; there is another fastener that is shorter than the others. Notation the location and make sure you put the fasteners back in the aforementioned identify during reinstallation.
Effigy 4 Working at the back of the valve comprehend, lift up the blackness sheathing (light-green arrow) that runs vacuum lines to the right side inner fender. This will add room and make it easier to pull off the valve cover.
Figure v Elevator upward on the valve cover to remove information technology from the cylinder head. If information technology'Â's too tight notice a safe corner and lever off with a prying tool.
Figure 6 With the right valve cover separated from the cylinder head lift information technology up and slide it in the direction of the blue arrows to remove it from the engine compartment.
Figure vii Flip the valve cover over and offset to peel abroad the rubber gasket (green arrow) and the safety grommets (yellow arrows) that seal the spark pull the holes. Yous tin can use a small corporeality of conditions strip adhesive on the new gasket to agree in place while you install the valve cover. Slide the valve cover in the same way you took information technology out. Install and tighten downwardly the fasteners. Position the wiring back on the valve cover and install the bracket that holds the wiring downward. You can now route the vacuum lines around the back of the valve embrace.
Figure eight This photograph illustrates the left side valve cover. Remove the 8 mm fastener that holds the fuel lines together (green arrow).
Effigy 9 Remove the fuel lines (green arrows) from the fuel distributor using a 17 mm wrench and motility them out of the way. This volition brand the valve encompass easier to remove.
Effigy 10 Remove the crankcase breather line from the valve comprehend by squeezing the clamp and pulling up on the hose. These hoses are brittle and may break while removing. Information technology's a good idea to supersede them if you're removing them.
Figure xi Remove the 9 four mm fasteners (green arrows) that agree down the valve comprehend. One fastener is longer than the other so call back where it goes during installation.
Figure 12 Lift upward on the valve embrace to split up it from the cylinder head. You lot may have to use a prying tool and lever upward on it if there is a tight seal. Notice a safe corner to lever upwards from so you to not impairment the sealing surface.
Figure 13 Slide the valve cover upward in the direction of the blue arrows to move it out of the engine compartment.
Figure 14 Flip over the valve comprehend over and peel away the outer gasket and inner grommets that seal the spark plug holes. Yous tin utilise a small amount of weather strip agglutinative on the new gasket to hold in identify while you install the valve cover. Slide the valve cover in the same way y'all took it out. Install and tighten down the fasteners. Position the brake booster vacuum line back on the valve cover and install the fuel lines and bracket that concur them together. You lot can now route the vacuum lines effectually the back of the valve comprehend. Install the spark plug wire cover and the engine cover/air filter housing. Showtime the engine and make certain runs smooth.
Got more questions? Ask any of our automotive experts.
How To Change The Valve Cover Gaskets On A 2003 Mercedes Sl500,
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