In this video, a Mercedes M270 turbocharged 4 cylinder engine from a 2014 CLA is torn down to see what’s inside and how it works. This engine suffered damage to the oil pan, likely causing all the oil to drain out and run the engine dry of oil. Oblivious to the owner, the engine’s connecting rod heated up so much causing the rod bearing to spin and the engine to knock, in addition to the camshaft and crankshaft bearings becoming scored and worn from the lack of lubrication and particles now floating around the engine. It is likely the driver ran the engine short of oil for a long period of time to cause so much internal damage.
The Mercedes M270 is an all-aluminum 4 cylinder engine, featuring no plastic components, including valve cover, timing cover and oil pan. It has dual overhead cams, both with variable valve timing, direct injection (with the injectors on top, and spark plugs off to the side) and a timing chain setup. While the basic layout is similar to other modern 4 cylinder engines, there are some special tools required to work on the timing side of the engine, such as the cam gears and timing chain slides. Additionally, the water pump impeller and oil coolers are still made of plastic.
Skip to section in the video:
0:00 Introduction
1:15 Teardown
12:21 Component Analysis
17:38 Conclusion
Get tools to work on your Mercedes engine here:
Oil Filter Wrench:
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E-torx Socket Set:
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Torx Socket Set:
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This is the Camera I use:
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