Are there any problems with the Mercedes M104 engine?

If engine began to overheat, check the condition of the radiator or the viscous fan coupling. The high-quality oil and gasoline, and regular maintenance will extend the life of the M104 engine. This engine is one of the most reliable Mercedes-Benz engines.

Is the cylinder head the same as the M104?

The cylinder head is the same as M104 E30 with four valves per cylinder. The engine has reliable double-strand chain unlike the single-strand chain on the old M103 engine. In 1992 the engine got variable geometry intake manifold.

What’s the difference between the Mercedes M104 and M103?

The main differences are the new cylinder block, new 89.9 mm pistons and new crankshaft with bigger 84 mm stroke. The cylinder head is the same as M104 E30 with four valves per cylinder. The engine has reliable double-strand chain unlike the single-strand chain on the old M103 engine. In 1992 the engine got variable geometry intake manifold.

How much power does a Mercedes Benz m104.991 have?

M104.991 – the same M104.990 but for Mercedes-Benz SL320 R129. M104.992 – M104.991 with compression ratio 9.2, power is 220 hp. Engine is for Mercedes-Benz 320 E W124, E320 W124 (1992-1997). M104.994 – M104.990 engine with another intake manifold. It power is 231 hp and torque – 231 lb-ft. Mercedes-Benz S 320 W140 (1993-1998).

What causes timing failure on a Mercedes Benz?

As a result, Mercedes-Benz was able to minimise instances of a timing chain stretching. However, engines with this revised timing system can still suffer from timing failure – in the 271 CGI specifically, it’s the chain tensioners that is often a source of timing problems.

What causes timing failure on a Mercedes 271 CGI?

However, engines with this revised timing system can still suffer from timing failure – in the 271 CGI specifically, it’s the chain tensioners that is often a source of timing problems. Tensioners apply pressure to your timing chain, keeping it nice and tense, therefore helping maintain fit between the timing chain and the camshaft sprocket.

Can a head gasket be replaced on a Mercedes M104?

An external oil leak from the head gasket at the rear, exhaust side of the engine often precedes the appearance of oil in the coolant, particularly on the M103 and M104. Head gasket replacement is not particularly difficult but the labour time can make up much of the cost involved.

Are there any issues with the Mercedes W124?

Whilst all these engines are long lasting with bottom end work being almost unheard of, there are a few issues to be aware of. All petrol versions can suffer head gasket problems although it is most common on the sixes and least common on the 16-valve fours.

When did Mercedes Benz stop making the M104 engine?

The Mercedes-Benz M104 is a straight-6 automobile engine produced from 1989 through 1999. It has a double overhead cam design with 4 valves per cylinder. It replaced the M103 and was replaced by the M112 V6 starting in 1997. The M104 continued in production until 1999 where its last use by Mercedes-Benz was in the W140 chassis.

How big is the stroke on a Mercedes M104?

The stroke is 73.5 mm (2.3-liter version has 89.0 mm stroke). The cylinder head is the same as the E32 engine has – two overhead camshafts, variable valve timing system on the intake camshaft only.

Navigation