Are there any problems with the Mercedes M278 V8?
Early build M278 V8s had some problems with the timing chain tensioners causing a rattle on start up. The engine has a pretty complicated timing chain drive arrangement. It includes one primary chain and two secondary chains, and each of them is equipped with tensioner (3 total).
Where is the high pressure pump on the M278 engine?
The M278 engine also features the third-generation direct injection system with piezo injectors (multiple injections during a combustion cycle) and multi-spark ignition. The high-pressure pump is located at the rear end on the right intake camshaft and drives by 4 additional cams.
What’s the compression ratio of a Mercedes M278?
Bore size, stroke, and bore pitch are identical. The M278 has new pistons with increased by 2 mm compression height. The connecting rods in opposite are 2 mm shorter in order to preserve a compression ratio of 10.5:1.
Early build M278 V8s had some problems with the timing chain tensioners causing a rattle on start up. The engine has a pretty complicated timing chain drive arrangement. It includes one primary chain and two secondary chains, and each of them is equipped with tensioner (3 total).
What’s the difference between the M273 and M278?
Many of these new features are shared with the M276 V6 engine family, which was announced at the same time. While the M273 was naturally aspirated, the M278 features twin turbochargers, one per cylinder bank, producing 0.9 bar (13 psi) boost pressure in most configurations.
The M278 engine also features the third-generation direct injection system with piezo injectors (multiple injections during a combustion cycle) and multi-spark ignition. The high-pressure pump is located at the rear end on the right intake camshaft and drives by 4 additional cams.
Is the Mercedes Benz M278 a gas guzzler?
The M278 is also more refined than its predecessor. The entire M278 lineup avoids the United States Gas Guzzler Tax, a first for V8 production engines from Mercedes-Benz.