Mercedes-Benz GLB Spark Plug Replacement Sample Course
Because the disassembly of in-line 4-cylinder engine is similar to that of V6 engine, it is simpler than V6 engine, so take V6 engine as an example here.
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② First, remove the air inlet and the automobile anti-freezing pot. (4-cylinder cars do not need this process)
(3) Remove the spark plug, and then remove the spark plug with the socket manual and its wrench tool. (Note: When disassembling, make sure that the specifications of the sleeve and wrench parts are perpendicular to the spark plug, otherwise it will lead to slipping. )
④ Compared with the new spark plug, the removed old spark plug is significantly different. There is a lot of carbon deposit on the external thread of the old spark plug, but the ignition gap has not changed obviously. If it is a self-priming engine, you can consider cleaning it, and the turbocharged engine should be replaced with a new spark plug.
⑤ When installing a new spark plug, make the spark plug slide down along the inner cavity, in order to prevent the spark gap from colliding and damaging the spark plug.
Mercedes-Benz GLB spark plug has carbon deposit cleaning method.
1, carburetor cleaner
Take a certain amount of cleaning agent from the vessel, soak the spark plug in it for 30 minutes, and gently clean the top of the spark plug head with a brush to remove the carbon deposit on it.
2, white vinegar cleaning
The way of white vinegar cleaning is the general trend, which is simpler and easier to use. The application times of white vinegar should not be too many, because its etching ability will damage the spark plug, and the white vinegar on the clean surface should be cleaned after each cleaning.
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