This is accompanied by a fuel-economy improvement of roughly 15 percent over the previous V-6 powertrain, although EPA figures are not yet available. For another, a larger turbocharger flows better and creates less back pressure at high rpm, extending the engines powerband. Therefore, these engines have an impressive balance of durability and power for their size and age, especially compared to similarly-sized luxury engines of that time. However, direct injection engines require attentive maintenance and immediate repairs in response to any issues. combined 11.0. The first thing that starts to fail on this engine is the crankcase ventilation system. Finally, having no accessory drive slices about two inches from the length of the engine, largely offsetting the thickness of the integrated motor/generator. So, look after it with regular, good quality oil changes. MERCEDES BENZ 94-99 W124 M104 ENGINE 24V 3.2 CYLINDER HEAD R1040161601 TESTED. Required fields are marked *. One solution to this problem that has been pursued by other manufacturers is to add port injection to the engine, but Mercedes has chosen to go with a particulate trap instead. This caused my vacuum pump to burn out. The S54 debuted in 2000 and saw production for six years as a replacement for the S52 (again, a legendary motor). However, machines are bound to normal wear and tear, so keeping the regular fluids in check might save dollars. Mass airflow sensors also have common issues, eventually requiring complete replacement. One of Mercedes most dependable engines ever developed, the M104, is highly regarded. Like the Jaguars' E-Type, this engine is also somewhat timeless. Intake and Exhaust - Note that on their own these mods will NOT ADD POWER in most cases, but they can help enhance power after other mods by removing the restriction. The more air you can get into an engine, the more fuel it can burn and uprating the induction with a turbocharger upgrade makes superb power gains. Fast road cams are one of the most significant mechanical changes, but they must be installed by someone who knows what they're doing and they are not always easy to source but you might find a local firm to regrind a stock camshaft. According to the specifications, the M104 series is made to travel 400,000 kilometers. Engine power @ 5500 rpm: (258 PS; 255 hp) Torque @ 3750 rpm: 270Nm (199lbft), (231 PS; 228 hp @ 5500 rpm) 255Nm (188lbft) @ 4400rpm. This can be caused by oil, dirt, or water entering the air ducts. The bore spacing on all M104 engines is the same as M103 engines. Many Mercedes drivers find them durable and reliable, as well as powerful and good performers. Another possible cause of overheating is a failing water pump. Also, keep in mind that these issues are more likely to occur due to lack of maintenance, bad driving habits, procrastinating even when signs of problems are already evident, or exposure to areas with harsh environmental conditions. Is this correct? However, that did not stop Mercedes from continuing to update the M104 and expand its usage for many more different applications. Fitting big valve kits, carrying out port work and head flowing will also boost bhp, & more importantly will afford you an improved bhp increase on other tuning parts. Mapping - remapping provides the most advantage in terms of cost savings, aftermarket ECUs, and piggyback ECUs are all alternatives. Saltwater specifically can cause much faster erosion. 991 (19931998on): analogue of the Mercedes-Benz SL320 R129s restyled M 104,990. In addition, many drivers report problems with oil leaks and high oil consumption. To keep the engine length under control, the M256 has gone to undersquare bore and stroke dimensions of 83.0 and 92.4 millimeters. Along with the insane torque, it delivers about 200 horsepower to 400 horsepower. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. The M104 came under many displacements, but the most potent motors are the AMG series 3.4-liters and 3.6-liters. Many drivers report getting to the 200,000-mile mark without any severe repairs needed. Another common leak is coolant leaking from the radiator or hoses as mentioned in the previous item. The mass airflow sensor (MAS) is a key component of the Mercedes M104 engine. . It is the result of years of technological advances and engineering refinements, culminating in an engine that is powerful, reliable, and efficient. Save my name, email, and website in this browser for the next time I comment. Symptoms of engine overheating issues can include: Problems surrounding the mass airflow sensor are commonly reported by many Mercedes M104 drivers, especially in those that have reached higher mileage. You can leave a response below or join our forum to discuss this article and car modification in detail with our members. They build the engine excellently, and Yamaha's help is noticeable. With these two quick responses, theres no need to fit a tiny turbocharger to minimize turbo lag. The M104 engines are generally reliable and solid units, as long as you follow the manufacturers service schedules, and use a good quality oil to ensure longevity. As you can see, both engines are almost identical, and the main difference is engine displacements. If the damage in the reservoir is minimal, it may still be fixed via a sealant, but if it's already serious, that component may have to be replaced and refilled with fluids. See details for shipping. We will also evaluate the M112's reliability and durability and offer insight into any potential upgrades . High oil consumption. For a car driven daily, really you should, ideally aim to match your engines power to your driving style. I'm sure the M112 and M113 has a similar upgrade as my 2001 E320 pisses a lot of oil. Overall though, the Mercedes M104 is definitely a banger, and it deserves all the praise that it has gotten over the years. We have tips on removing carbon build up. Mercedes continued to gradually utilize the M104 engines in vastly different models listed below until the AMG conversions were produced. Ships from United States. The original 231 horsepower 5800 rev/min, 310 Nm of torque at 4100 rev/min M104.990 (1991 to 1993 onwards). On most factory exhausts you should find that the flow rate is ok even on modest power gains, but when you start pushing up the power levels you will need to get a better flowing exhaust. Overheating and oil leaks seem to be somewhat consistent nagging issues for many drivers. Oil leaks are a frequent, bothersome problem with many engines. This motor can also develop 20 horsepower and 162 lb-ft of torque, so it can provide a useful assist to the engine, particularly at low rpm, reducing the need to downshift when the driver calls. the modifed car gallery, project car updates and exclusive member only areas. The M256 engine, and its predecessor, the M104, are progressively . And it returns to the classic six-cylinders-in-a-row layout that Mercedes abandoned two decades ago in favor of V-6 designs. Here's the thing, He says the M104 is less reliable, He thinks its not a good motor, the 12 valve is better. Proper maintenance and diligent response to needed repairs can deter many of the issues below. Remap Diesels Your Constructive comments on this article, I really want to improve this article with your help and suggestions. It would also be worth reading our unbiased tuning articles to get a full grasp of the benefits and drawbacks of each modification. 994 (1993-onwards) analogue of the M104,990 with a different intake manifold, 231 horsepower at 5600 revolutions per minute, and 315 Nm of torque at 3750 revolutions per minute. Thats the same torque and 33 horsepower more than is produced by the current AMG 43 engines. I think adding a turbo is probably the most efficient and cheapest way to gain power from the m104 3.2L engine. Debuting in 1986, the 4.0-liter saw production till 2006, when the new 3.8-liter V6 overtook the legend (used in the Chrysler minivan). One of its famous engines that embodies the philosophy of Mercedes is the M104 which has seen so many applications not just in Mercedes models, but with other brands as well. To fix this, you'll need to replace the radiator cap and hose. Power varies from 275 to 574 horsepower impressive numbers for its era. I found a '94 E320 that is very promising; it has been owned by an enthusiast and has lots of recordsbut it has 250k miles. Please use our forums if you wish to ask a tuning question, and please note we do not sell parts or services, we are just an online magazine. The stroke is 73.5 mm (2.3-liter version has 89.0 mm stroke). Furthermore, all M104 engines had camshafts . . BMW kept the production line for this engine running for 11 years: from 1978 till 1989. 2.8 L M104.900 [ edit] However, some highly unique inline configurations also do a fantastic job. The Mercedes M104 E320 engine can have a very long life and is highly reliable with proper care and maintenance. One is to replace the radiator cap. The 3.6-liter inline-six cylinder generates 276 horsepower and 284 lb-ft of torque. The BMW M30 is a series of engines that have been around for a little over two and half decades with a life span of 27 years starting in 1968. 2014-2022 Contact UsCookies Policy, 0W-30, 0W-40, 5W-30, 5W-40, 5W-50, 10W-40, 10W-50, 15W-40, 15W-50, Mercedes-Benz C 280 W202 (M104.941), Mercedes-Benz 280 E / E 280 W124 (M104.942), Mercedes-Benz E 280 W210 (M104.945), Mercedes-Benz 300 SE W140 (M104.944), Mercedes-Benz S 280 W140, Mercedes-Benz SL 280 R129 (M104.943). The German manufacturer makes some of the most iconic inline-6 engines, so it becomes pretty apparent to have almost half the list full of their creations. guide to twinchargers if you want to read more. Now they are starting to appear on gasoline engines as well. If the MAS fails, it can cause several problems. Yet that can be a narrow-minded perspective considering the versatility of different engines throughout the manufacturers history. You may need to boost your exhaust if the existing exhaust is actually causing a restriction. Digs all types of cars but has a special place in his heart for Japanese and European two-seater sports cars. It is one of the most costly upgrades but provides the best gains. Modifications But in 1997, the company introduced its first V-6, the 90-degree M112, which shared its basic single-overhead-cam, three-valve-per-cylinder, twin-spark-plug design with the subsequent M113 V-8. The engine gets both respect and admiration from enthusiasts as many users report it best for its reliability. The intake and exhaust durations will alter depending on the chosen cam profile, so large torque gains are on offer for cam upgrades. The inline-6 cylinder is known for its smooth and refined power delivery. Replacing the radiator hose is a bit more complicated, but it can also be done at home with the help of a repair manual. Along with the insane . Many Mercedes drivers appreciate the durable construction of these M104s. 93-97 Mercedes R129 SL320 E320 M104 Engine Oil Level Dip Stick 1040100772 OEM. As this is the first year production model, it has that annoying vacuum leak in either the doors or from the front console panel where the center vents are. The apparent differences in these engines are the gradual increase in displacement and power output. Proper upkeep and high-quality oil usage are vital for most engines, including the M104. The NA inline-6 3.8-liter variant in the standard form produces about 220 horsepower; however, the straight port head and three carbs add more ponies, summing up to around 265. Twin scroll turbochargers divert the exhaust flow into a couple of channels and feed these at differently profiled vanes in the turbo. Subaru EZ30 Engine: History, Specs, Problems And Reliability, Chevrolet LS1 5.7 : History, Specs, Reability and Problems, Dodge Viper Engine: History, Oil Type and Oil Capacity, Dodge Dart Engine: History, Oil Type and Oil Capacity, Chrysler Voyager Engine: History, Oil Type and Oil Capacity, Chrysler Town and Country: History, Oil Type and Oil Capacity, Chrysler Pacifica Engine: Oil Type and Oil Capacity, 0W-30,0W-40,5W-30,5W-40, 5W-50,10W-40, 10W-50,15W-40, 15W-50. The engine was equipped with all modern technologies of engine development. Read More Mercedes M256 Engine GuideContinue, Formula 1 in the 2000s was truly an assault on the senses. Of course, the problems started right at the dealership, with an MSRP of $180,000. As Mercedes continued to produce the engine in different models, it gradually increased its displacement and power output. This is usually caused by a faulty gasket or seal and can be fixed by replacing the faulty part. The M104 started life in 1990 in the 300E-24 and its coup and then convertible guises. This is even true with the very precise piezo injectors in the M256, which operate at up to 2900 psi of injection pressure. Also, with the intake and exhaust systems on opposite sides of the engine, theres plenty of space to bring the catalytic converters close to the turbocharger, which helps the catalyst achieve operational temperature more quickly after a cold start to reduce emissions. The cause of the severe oil consumption is often the wear of valve stem seals. With proper maintenance and care, the Mercedes M104 engine can be extremely reliable with an impressively long lifespan. BMW. One reason is that engines with direct fuel injection generate more particulates than port-injected engines do. But, again, no engine is absolutely perfect or made of stone. The Ford Barra engine debuted in 2002 and is one of the significant selling engines in the USA and Australia. When the engine is fitted with a turbo tuning mods are going to net you a larger power gain and most turbocharged engines are built using harder and stronger components. Let me know your thoughts on high-mileage gas engines. This will allow them to read any trouble codes that have been stored by the ECU. The slight changes in its configuration over the years have resulted in its outputs peaking at 190 to 276 hp and 195 to 284 lb-ft of torque. Mercedess Nine Decades of Six-Cylinder History. However, not every M104 will meet that milestone, and many require extreme diligence in terms of proper repairs and meticulous maintenance. And such a powerful motor can quickly and effortlessly restart the engine during idle-stop mode. The M104 E28 2.8-liter engine is the smallest engine of the M104 series. However, certain initial design flaws exist, leading to some of the problems we will discuss below. not much else. Please drive sensibly we do not endorse reckless driving. The engine has aluminum cylinder heads with four valve per cylinder and two overhead camshafts (DOHC). The only m104 don't recommend is the 104.980. It appeared in 1991. Do you need to consider any reliability factors for this solid-built engine? Mercedes-Benz 320 E and E320 W124 sets. Sadly, the Mercedes M104 engine is a part of that group as well. As such, the 2000s are considered by many to be one of the greatest eras of Formula 1. Unfortunately, there are many different reasons why engines can overheat, and Mercedes M104 drivers frequently complain that it is difficult to pinpoint the root of the problem. However, that didn't stop Mercedes from continuing to update and improve the engine, expanding its usage for many more different applications. They made the engine substantial and can be able to do over 300,000 miles. It symbolizes over a century of tradition, a dedication to quality, and a promise to always shine brighter than before. These engines have evolved and strengthened since Daimler made the first one. Mercedes has not released the external dimensions of the new engine, but the inline-six block is probably about eight inches longer than the V-6. Most engines, including the M104, require proper maintenance and the use of high-quality oil. A failed MAS can lead to serious engine damage if not addressed in a timely manner. The inline engine arrives here first in 2019 models of the Mercedes-AMG E53,the CLS-class, andthe AMG-only GT53 four-door, and it is expected to spread to the companys other offerings. Upgrades to turbochargers and superchargers - forced induction is the most efficient approach to increase air supply, allowing you to burn more fuel and make more power. Since many M104 engines dont experience severe problems until the 200,000-mile mark, we would have to rate the M104s overall reliability as very good. It was designed on the basis of the 3.2-liter engine. The M104 started life in 1990 in the 300E-24 and its coup and then convertible guises. The most common is the contamination of the sensor by elements. The Mercedes M104 can be found in the initially introduced 2.8 L ranging upwards to the 3.4L and 3.6L AMG versions. M110 & M123. Additionally, worn valve stems can also be a common cause of nagging leaks and higher oil consumption. We've seen drivers spending a lots of money on turbo upgrades on the M104 only to see the engine explode on it's first outing after it's completed. BenzWorld.org forum is one of the largest Mercedes-Benz owner websites offering the most comprehensive collection of Mercedes-Benz information anywhere in the world. Here are some of itsmost interesting details. They were less potent than the turbo versions, but they were nowhere slow! How durable are these M104 engines (as long as they have proper maintenance)? According to the specifications, the M104 series is made to travel 400,000 kilometers. But that's with fastidious maintenance as prescribed by the Germans and one owner. Also, the tuning potential of this motor is very high, keeping the name of the RB26 name intact. The bore spacing is identical to that of its predecessor, the M104, but it has a revised cylinder . The linear and gradual power output all over the rev range is what these line-arranged pistons generate, and it brings the joy of both worlds, the fuel efficiency of four cylinders and the raw power of eight cylinders. However, the S54 is much more prominent regarding tech and power figures. The issues about it are fairly few and repairable at their onset. Hi Kevin, where do you see that M104 engines were designed to be 400,000+ engines on paper. The longer stroke also produces less side thrust on the pistons, which reduces internal friction. 3. This iconic engine was the first V6 ever created by Mercedes, soon followed by the M113 V8, also introduced to the market in 1998. Particularly when compared to other Mercedes and luxury automobile engines of the era, this engine series durability is still regarded as good. The Mercedes M112 E32 series is the engine that will be discussed today. Driving on a faulty mass airflow sensor does not directly result in severe engine damage. If the water pump is failing, it will need to be replaced. It was designed on the basis of the 3.2-liter engine. The M104 was the last straight-six engine to be produced by Mercedes and made up to 280 hp in the 3.6-liter C36 AMG. Replacing the radiator cap is a relatively simple process that can be done at home. Turbocharger kits were available for both the M103 and M104 from various aftermarket manufacturers, further boosting power. The Mercedes M104 engine can be quite reliable if you maintain it well. 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