Mercedes M271 Engine 1.8L Specs, Problems, Reliability. The M271 is a series of the inline four-cylinder engines that appeared in 2002. The brand-new generation engine has an absolutely new cylinder block, made of aluminum alloy with cast iron sleeves. There is a balancing mechanism inside the cylinder block. The M271 has an aluminum cylinder head, double overhead camshafts, four valves per cylinder and hydraulic lifters. The engine has variable valve timing system on both intake and exhaust camshafts.
The M271 1.8 L engine has two types of cylinder heads for KE and DE versions (indirect injection and direct injection fuel system). KE and DE pistons are different. The size of the intake valve is 30.5 mm, exhaust – 27 mm. Connecting rods were taken from the M111 EVO engine. The M271 engine has a timing chain and a little supercharger Eaton M65 (Kompressor).
In 2009, the M271 series was updated, and the highlight of these engines became the turbocharger IHI Al 0065/0066 instead of a previously utilized supercharger. The engine control system was altered to Siemens SIM4 LDE.
The broad power series of the M271 1.8-liter engine permitted to change the previous M111 engine series. The M271 family also has a 1.6-liter variation. The next four-cylinder family, the M274/M270, appeared in 2011 and replaced the M271 from the production after a short time.
M271 KE/DE 18 1.8 l Engine Problems and Reliability
1. Power loss. That is among the most common problems with the M271, which caused by soot on valve stems.
2. Engine sound throughout fired-up. The engine had an undependable single-stand timing chain and stretched chain produces a great deal of sound.
Mercedes M271 Engine 1.8L Specs
|Production years||2002-present day|
|Cylinder block material||Aluminum|
|Cylinder head material||Aluminum|
|Fuel system||Fuel injection|
|Number of cylinders||4|
|Valves per cylinder||4|
|Type of internal combustion engine||Four-stroke, turbocharged and supercharged versions|
|Torque, lb ft||140-192/1500-3500|
|Engine oil weight||0W-30, 0W-40, 5W-30, 5W-40|
|Engine oil capacity, liter||5.5|
|Oil change interval, mile||6,000|
|Applications||C 180 Kompressor W203, C 180 Kompressor W204, C 200 Kompressor W203, C 200 Kompressor W204, C 230 Kompressor W203, C 250 W204, CLK 200 Kompressor C209, E 200 Kompressor W211, E 200 W212, E 250 W212, E 200 Coupe C207, E 250 Coupe C207, SLK 200 Kompressor R171, SLK 200 R172, SLK 250 R172, Sprinter W906, CLC 180 Kompressor CL203, CLC 200 Kompressor CL203|
Mercedes M271 Engine 1.8L Modifications
- M271.820 (2009 – present day) – EVO adjustment. Compression ratio is 9.3, power – 184 hp, torque – 199 lb-ft. This motor was designed for Mercedes-Benz C 200 BlueEFFICIENCY W204, SLK 200 BlueEFFICIENCY R172, E 200 BlueEFFICIENCY W212, E 200 Coupe BlueEFFICIENCY C207.
- M271.860 (2009 – present day) – another EVO modification with 202 hp and 228 lb-ft of torque. This motor is for Mercedes-Benz C 250 BlueEFFICIENCY W204, SLK 250 BlueEFFICIENCY R172, E 250 BlueEFFICIENCY W212, E 250 Coupe BlueEFFICIENCY C207.