![]() The M113 engine has two spark plugs arranged on the right and left of the exhaust valve for the combustion chamber. To add, on the crankshaft in the cylinder, a balancer shaft is placed that rotates inversely to the crankshaft at the same rate to equalize first-order rocking motions. Mercedes chose a single exhaust valve to result in a smaller surface exhaust passage that minimizes heat losses when cold and enables the catalytic converter to reach the operating temperature faster.Ī thin-walled sheet metal exhaust manifold also contributes to this by absorbing only small amounts of heat. It has a light aluminum alloy cylinder head with a single overhead camshaft per cylinder bank the camshaft is also the balancer shaft, the same as the M112 engine, and is driven by a double roller chain.įor each cylinder, the M113 engine has two intake valves and one exhaust valve, which were actuated by light metal roller rocker arms with hydraulic valve clearance compensation. It is integrated with sequential fuel injection, iron-coated aluminum pistons, magnesium dual-length intake manifold, and fracture-split forged steel connecting rods. The M133 cylinder block is made from aluminum with cast-in Silitec (Al-Si-alloy) cylinder liners and cylinder banks arranged in a ‘V’ configuration. The Mercedes M113 engine is more technically related to the M112 V6 gasoline engine since both engines share the same cylinder bank angle of 90-degrees and uniform cylinder spacings of 106 mm.Īnd that results in more efficient production, especially in the facility they occupy as well as the components they use. Compression Ratio: 10 (E43 and E50) 10.5 and 11 for E55.Valvetrain: SOHC three valves per cylinder.The M113 was offered both with mechanical supercharging and without. Each of these versions is attached with different upgrades for their respective applications, which we will discuss later. There are three versions that Mercedes made for the M113 engine with various displacements – 4.3, 5.0, and 5.4 L. ![]()
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