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Mercedes-Benz M137 engine
The Mercedes-Benz M137 engine is a naturally aspirated, SOHC 60° V12 engine, with three valves per cylinder, 2 intake and 1 exhaust. It was built to replace the larger and heavier, yet more powerful, DOHC, four valves per cylinder, naturally aspirated, 6.0 L M120 V12 unit. The M137 was used briefly between 1998 and 2002 for the W220 S-Class (long wheelbase only) and C215 CL-Class.[1] The architecture is similar to M112 and M113 engines, and is designed to match the overall dimensions of a V8 unit with undersquare internal measurements. The crankcase was cast in a lightweight alloy with "Silitec" (silicon/aluminium) cylinder liners to save weight. The M137 is 80 kg lighter than its predecessor and features cylinder deactivation technology. Both displacement variants have 10:1 compression ratio.[2] The M137 was replaced by the more powerful twin-turbocharged M275 engine. E58Mercedes introduced the M137.970 engine in its 5.8-litre form in S 600 and CL 600 models. The internal measurements of 84 by 87 mm (3.3 by 3.4 in) of bore and stroke translates to a total displacement of 5,786 cc (5.8 L; 353.1 cu in). The resulting power output is 270 kW (367 PS; 362 hp) at 5500 rpm and torque figures of 530 N⋅m (391 lb⋅ft) at 4250 rpm.[2] From 1997 up to 2002, Mercedes produced 11,693[3] examples of the M137.970-powered S 600 and further 6,348 units of the coupé version, CL 600.[4] M137.970 applications:
E63 AMGIn 2001 Mercedes and AMG introduced a series of special high-output models equipped with a larger-displacement M137.980 engine.[5][6] Cars were available through AMG dealers only and sold to selected Eurasian customers. The 2001 S 63 AMG was produced in only 70 units. The 2001 CL 63 AMG exists in only 26 examples and the rarest of all is the 2002 G 63 AMG with only five units produced.[7][8][9][10] The total displacement of 6,258 cc (6.3 L; 381.9 cu in) is thanks to internal measurements of 84.5 by 93 mm (3.3 by 3.7 in).[11] The resulting power output is 326 kW (443 PS; 437 hp) at 5500 rpm and torque figures of 620 N⋅m (457 lb⋅ft) at 4400 rpm.[12][2] M137.980 applications:
See alsoReferences
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