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I wanted to give you an update on my issue. I took the car to the shop, and it turned out that the head gasket had cracked, causing coolant loss.
I bought a new cylinder head and installed it on my M274.920 4MATIC, but after just 20 km, the engine failed. The crankshaft bearings failed, and the crankshaft spun, leading to a complete breakdown. 😞
So, if you're experiencing issues with the M274 engine, my advice is not to rebuild it—just go for a new or low-mileage used engine instead.
I wanted to give you an update on my issue. I took the car to the shop, and it turned out that the head gasket had cracked, causing coolant loss.
I bought a new cylinder head and installed it on my M274.920 4MATIC, but after just 20 km, the engine failed. The crankshaft bearings failed, and the crankshaft spun, leading to a complete breakdown. 😞
So, if you're experiencing issues with the M274 engine, my advice is not to rebuild it—just go for a new or low-mileage used engine instead.
I'm curious, how many miles total on that engine and did you buy it new or used? Also, what type of gas were you using and what was your oil change regiment?
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.
