Mercedes M113 engine

The Mercedes-Benz M113 engine is a V8 petrol that was introduced in 1997 and replaced the M119 engine. The standard M113 engines were built in Stuttgart, while the AMG versions were assembled in Affalterbach. Closely related to gasoline M112 V6 engine, the M113 engine had 106mm cylinder spacing, 90-degree V-configuration, sequential fuel injection, and Silitec die-cast alloy cylinder block (Al-Si alloy).

Description

Liners, forged steel connecting rods, iron coated aluminum pistons, one SOHC overhead camshaft per cylinder bank (chain driven), two spark plugs per cylinder.

The M113 engine had two intake valves and one exhaust valve per cylinder. The use of one exhaust valve per cylinder was chosen to minimize cold heat loss and allow the catalyst to reach its operating temperature more quickly. On the crankshaft in the camber of the block, a counterbalancing balancing shaft is installed, which rotates against the crankshaft at the same speed to neutralize vibration.

Engine M113 E 50 4966 cc cm was available with a cylinder deactivation system, which allowed two cylinders to be deactivated on each row when the engine was at low loads and was running at less than 3500 rpm.

The M113 engine was replaced by the M273, M156 and M152 engines.

Specifications and Modifications

Modification	Volume	Bore / Stroke	Power	Torque	Compression ratio
M113 and 43	4266 cc	89.9 x 84.1	200 kW at 5750 rpm	390 Nm at 3000-4400 rpm	10.0:1
			205 kW at 5750 rpm	400 Nm at 3000-4400 rpm	10.0:1
			225 kW at 5850 rpm	410 Nm at 3250-5000 rpm	10.0:1
M113 and 50	4966 cc	97.0 x 84.1	215 kW at 5600 rpm	440 Nm at 2700-4250 rpm	10.0:1
			225 kW at 5600 rpm	460 Nm at 2700-4250 rpm	10.0:1
M113 and 50 (deactivation)	4966 cc	97.0 x 84.1	220 kW at 5500 rpm	460 Nm at 3000 rpm	10.0:1
M113 and 55	5439 cc	97.0 x 92.0	255 kW at 5500 rpm	510 Nm at 3000 rpm	10.5:1
			260 kW at 5500 rpm	530 Nm at 3000 rpm	10.5:1
			265 kW at 5750 rpm	510 Nm at 4000 rpm	11.0:1*
			270 kW at 5750 rpm	510 Nm at 4000 rpm	10.5:1
			294 kW at 5750 rpm	520 Nm at 3750 rpm	11.0:1
M113 AND 55 ML	5439 cc	97.0 x 92.0	350 kW at 6100 rpm	700 Nm at 2650-4500 rpm	9.0:1
			368 kW at 6100 rpm	700 Nm at 2650-4500 rpm	9.0:1
			373 kW at 6100 rpm	700 Nm at 2750-4500 rpm	9.0:1
			379 kW at 6100 rpm	720 Nm at 2600-4000 rpm	9.0:1

M113 problems

Since the M113 is an enlarged copy of the M112 engine, their characteristic problems are the same:

• the crankcase gas recirculation system is clogged, the oil begins to squeeze out through the gaskets and seals (through the crankcase ventilation tubes, the oil also begins to press into the intake manifold);
• untimely replacement of valve stem seals;
• wear of cylinders and oil scraper rings.

The stretching of the chain can occur by 200-250 thousand mileage. It is better not to tighten and change the chain at the first symptoms, otherwise you can also get to replace the stars and everything accompanying.

M113 engine tuning

M113 E43 AMG

The M113.944 V8 engine was used in the W202 C 43 AMG and S202 C 43 AMG Estate. Compared to the standard Mercedes-Benz engine, the following changes have been made to the AMG version:

• Custom forged composite camshafts;
• Intake system with two grooves;
• Larger intake manifold;
• Unique exhaust system with enlarged pipes and modified muffler (system to minimize exhaust back pressure).

Engine M113 E 55 AMG compressor

Installed in the W211 E 55 AMG, it was equipped with an IHI type Lysholm supercharger located between the cylinder banks, which provided a maximum pressure of 0,8 bar and had an integrated air / water cooler. The blower had two Teflon-coated aluminum shafts that rotated at up to 23000 rpm, pushing 1850 kg of air per hour into the combustion chambers. To minimize fuel consumption when operating at partial throttle, the compressor was only operated at certain engine speeds. It was driven by an electromagnetic clutch and a separate poly V-belt.

Other modifications to the M113 E 55 engine:

• Reinforced block with stiffeners and side bolts;
• Balanced crankshaft with modified bearings and stronger material;
• Unique pistons;
• Forged connecting rods;
• Redesigned oil supply system (including sump and pump) and separate oil cooler in the right wheel arch;
• Valve system with 2 springs to increase the maximum engine speed to 6100 rpm (from 5600 rpm);
• Modified fuel system;
• Twin-pipe exhaust system with change-over valve and 70 mm tailpipes to reduce exhaust back pressure;
• Modified ECU firmware.

Tuning M113 and M113K from Kleemann

Kleemann is the most popular company offering tuning kits for Mercedes engines.

Kleemann offers a complete engine tuning program for naturally aspirated Mercedes-Benz M113 V8 engines. The tuning components available cover all aspects of the engine and represent the "Stage" concept of tuning from K1 to K3.

• 500-K1: ECU tuning. Up to 330 hp and 480 Nm of torque.
• 500-K2: K1 + modified exhaust manifolds. Up to 360 hp and 500 Nm of torque.
• 500-K3: K2 + super sport camshafts. Up to 380 hp and 520 Nm of torque.
• 55-K1: ECU tuning. Up to 385 hp and 545 Nm of torque.
• 55-K2: K1 + modified exhaust manifolds. Up to 415 hp and 565 Nm (419 lb-ft) of torque.
• 55-K3: K2 + super sport camshafts. Up to 435 hp and 585 Nm of torque.
• 500-K1 (Kompressor): Kleemann Kompressor System and ECU tuning. Up to 455 hp and 585 Nm of torque.
• 500-K2 (Kompressor): K1 + modified exhaust manifolds. Up to 475 hp and 615 Nm of torque.
• 500-K3 (Kompressor): K2 + super sport camshafts. Up to 500 hp and 655 Nm of torque.
• 55-K1 (Kompressor): customization of the Kleemann Kompressor ECU. Up to 500 hp and 650 Nm of torque.
• 55-K2: K1 + modified exhaust manifolds. Up to 525 hp and 680 Nm of torque.
• 55-K3: K2 + super sport camshafts. Up to 540 hp and 700 Nm of torque.

Improvements are available for: ML W163, CLK C209, E W211, CLS C219, SL R230, * G463 LHD / RHD, ML W164, CL C215, S W220.

In all cases, the removal of the first catalysts will be required.