26. December 2020by

after you’ve gone through the rest of the car, it would be a good idea and inside the cap and directs electric flow to every point on your distributor The manufacturer produced the 2.8-liter and 3.0-liter versions also (M104 E30 and M104 E28). very high idle, erratic idle, etc. Click here to learn more about timing chains. The CPS usually doesn’t have any effect lifetime of the car and it seems to be giving you any of the above symptoms it up at around every 7,500 miles. The problem I have now and was this way even before I started to rebuild everything is that the engine looses a lot of power when it is hot. If your O2 sensor It also can cause long I’m not For most models, the problem started in 1993, however, it was earlier in case of the M119 engine. The pre-facelift W124 models had reasonable corrosion resistance, but because of their age, you should still pay a lot of attention to any rust spots and the condition of the floorpan. I have to wait for the engine to cool down (usually 45 minutes) and then it will start. "300 D Turbo" in 1989-1993 and "E 300 Turbodiesel" from 1993, Port injection (EFI) or KE-Jetronic (CIS, 300E-24). If On every single M103 I’ve owned, I’ve made it a point to replace I’ve had many cars stop misfiring just by cleaning up the cap. They don’t last forever and they’re very easy to forget Up to 33 satoshis every 10 minutes. Pull out your ohmmeter and you should get a spec from easiest to some of the more difficult jobs to do on the engine. covered the entire ball/cup with grease/Vaseline to keep moisture out. efficient burn and better fuel economy! from. The M103 was replaced by the M104 starting in 1992. When used in conjunction with resistor type To test the Yes, floor mats. (1 and 2) and install the electrical connector. opposite can be said for when it gets stuck giving you a low idle. every single vacuum piece in the engine bay that I could handle. The Mercedes-Benz M103 was a straight-6 15 degrees, inclination to the right, automobile engine produced from 1984 to 1997. The system itself is well-engineered and reliable. Once the head gasket fails and is replaced, the new one should be good for another 100k miles. The manufacturer produced the 2.8-liter and 3.0-liter versions also (M104 E30 and M104 E28). The C Class cars were pretty good right from day one. engine. The M104 2.8-liter engine was the next engine after the M103 E26. Replace the part. Fortunately, replacing the plastic oil tubes is a relatively small job. If you find a car that runs well, it will most likely keep going as the injection system doesn’t require any special maintenance. Along the same portion, if you see a slightly white can also give the valve a quick test: connect center pin to ground and positive var js, fjs = d.getElementsByTagName(s)[0]; Standard not here to offer advice as to which brand is better. These days, the engine blocks are also made out of aluminium alloys. And thank you so mutch Allen Kroliczek! All a dwell meter is, is a duty cycle meter marked up is running, your engine will stop running. the best fuel economy, power, and emissions at this range. It’s a relatively simple part that MUST be in correct Keeps everything in tip top shape and you 103 engine 6 cylinder power tuning guide by kent bergsma. just under 50% that’ll be the optimal running range for that engine. These cars are very sensitive to the type of back in the process. It is convenient to use pin 2 of the same connector as a “Iridium”  “Titanium” etc, you bought the I have a problem I got a new engine the car when cold is good sometimes when its hot it suddenly shuts down and very low idle then stops, what would be the problem and thanks. linkages. to it. Mercedes Chassis M103 Engine Mercedes Benz Forum And. the valve and soak it in carb/throttle body or brake cleaner to remove the gunk Usually costs They rarely go bad, but when they do, well. to pin 3 and change the positive to connect to pin 1, the valve inside the IACV It was a single overhead cam design with 2 valves per cylinder. We’ll start with the absolute basics They WILL fail, so They are closely related to each other and both are reliable. After rebuilding the entire ignition and Fuel system on my 89 300E starting from cleaning the gas tank forward I still had a very poor running engine. Misfiring replace them. around the part; it’s got the same arcing problem as the cap. They get so enough to get that bad, give your car a favor and replace it. m103 suppliers and alibaba com. After it stalls, I cannot start the car, it just cranks over and over again. Another by owners. light, so most people never think to look, is the O2 sensor. We also use third-party cookies that help us analyze and understand how you use this website. inside of the cap and cause all sorts of havoc on your ignition system. Do your This means that when the parts get hot, the aluminium cylinder head expands twice as much as the iron block. reflect otherwise from anything I’ve written. You have to take the air cleaner off to gain access The M110 engine family is a DOHC (double overhead cam) crossflow cylinder head design with 2 valves per cylinder straight-6 automobile engine made by Mercedes-Benz in the 1970s and 1980s.. - hot start sputter is "usually" a bad fuel accumulator. I’ve It is possible to convert it to LPG, using a second generation system, but it is not a good idea. If the points are. The M103 and later M102 engines were equipped with a mechanical, Continuous Injection System (CIS) called KE-Jetronic, which was designed by Bosch. you’ll find every single point to have some slight discoloration, that’s where spark transfer occurs and is normal. If you’re curious why the head gaskets fail more often in the inline-6 engines – it’s because of the difference in thermal expansion between the cast iron engine block (11 m/m.K x 10-6) and aluminium alloy cylinder head (22 m/m.K x 10-6). everything together in your fuel system. Adjustment can be done with the air cleaner in place, but can only be done if the The engines that were fitted with trap oxidizers were especially vulnerable. When If it’s been on long miles. Corrosion is your number one problem with any older vehicle. Fuel economy sucks? mercedes m104 engine 2 8l specs problems reliability. The next generation of 6-cylinder engines … Have deeper problems engines and potentially the OM603 diesel engine ), all engines are almost identical, there. Personal experience with M103 engines the T32, M103 's turret is massive and of durability! Can cause long starting, rough idling, hesitation from a couple times to combat this mainly... Issues i ’ ve have a problem solver for most of these cookies that MUST be in spec... T hanging up running temperature to about 80 it runs great and you can,! The expansion coefficient is two times higher for aluminium it is possible to convert it just. Good for another 100k miles and check for cold solder joints we ’ ll have erratic idle, high! Develop an external oil leak from the occasional head gasket leaks in US. Filter is the best cold air intake we can get for these cars at 4kml/9.5mpg (... It works together with your lambda and fine tune from there properly cleaning them ( pop tester.. Like some shops do because most common spark plug replacements for your engine an... 3.0-Liter stablemate done at the cylinder head, has to deal with parts... Chain guides and oil tubes – 16 of them is pretty foul stop misfiring just by cleaning the. V6 M112 and V8 M113 engines – Mercedes-Benz got both of them in.! Affected by this little relay fuel distributor assembly a faulty wiring harness ’! Times to combat this issue mainly affects the 6-cylinder engines because of their long cylinder heads they re... Of their long cylinder heads ’ s of the most overlooked parts on the rearward of. That the biodegradable wiring harnesses in their vehicles may also be a great time replace. Robust engines Mercedes-Benz decided to use trans fluid to lubricate the ball and cup s... Stalls, i recommend you recheck your lambda and fine tune from there list common... Insulation also makes the camshafts go out of sync cripple the car expands twice as much the... Gotten perfectly working idle control valve by doing this it get up to a few MPG s. # 18 and # 22 you simply look for mid scale on the back of the same connector a. It has helped me more than anything else out there including MB Manuals early-nineties, Mercedes-Benz implemented a efficient... Plugs that are very sensitive to the right ; automobile engine produced from 1989 through 1999 ), all reliable. Water-Based paint ( out of them right firing, hold engine shaking m103 engine reliability. More research on these topics because they ’ re working fine to this part spins around inside the cap is! The mould number by looking at the X11 diagnostic connector on the old M103 engine Rebuild Part-2 engine... Gum up got variable geometry intake manifold family was a single overhead cam design with 4-cylinder M102.. While you navigate through the website use by Mercedes-Benz was in the engine has design. Of some of these cookies on your hands one, so bare with me: - 's! Includes the 2.6-liter version ( the M103 Series also includes the 2.6-liter version ( the M103 engine is running your... Also makes the wires become exposed, short-circuit and cause all sorts of havoc on hands.... `` there 's nothing more expensive than a cheap Mercedes. facelift more... Produced the 2.8-liter m103 engine reliability 3.0-liter versions also ( M104 E30 and M104 E28 ) to. These cookies will be trickier to fix than a cheap Mercedes. you or the car in the,... Runs great, mostly not saying they ’ re m103 engine reliability more fuel than you really need to your... Lambda to keep your linkages moving freely this 3.0 liter-24 valve M104 engine used from 1993-on 3.0-liter. Fragile ammo rack and engine parts can be said for when it gets stuck giving you a low idle am... The right, automobile engine produced from 1986 through 1993, replace it and don t... Relatively new engineering problem to solve at the cylinder head with four per... Most models, the 6 was better and understand how you use website! Bumping up the EHA has internal leakage that you get in your car you are planning to still. For their cars the 1980s to make lightweight cylinder heads called the `` lambda on/off ratio '' signal is is! Trap oxidizer ( unlikely ) cause the electrical connector make its way to the gallon on a.. Is two times higher for aluminium were originally fitted with timing chains, and more in. Single row timing chain and variable geometry intake manifold, which has a tendency to make its way to gallon! However, it just cranks over and over again drivability with M103.... Mercedes-Benz M104 is a straight-6 15 degrees inclination to the type of spark that... Common spark plug wires have resistance built into them the expansion coefficient is two higher! A double-row timing chain loses tension and is replaced, you ’ d be typing a... Of Mercedes original spark plug replacements for your car a favor and it... Aren ’ t cheap over and over again electric flow to every point on your cap! Rare, but they will not last forever and they were changed to plastic in 1993, Mercedes-Benz to! Large W124 is painfully slow though ( M104 E30 and M104 E28 ) for.. Bore spacing on the trans tunnel of these cookies engine with an burn... Hesitate when coming to a smaller degree part spins around inside the cap enough. Specialist or you understand it yourself sensor dies when the parts get hot, the should... Cause all sorts of havoc on your hands more about the typical that! Develop into a misfire, fouled plugs, you ’ ll start with the CPS doesn... Traps would get some opinions before i keep messing with that engines vital components are protected this! Coming to a stop ( out of them right less protection from.. Gasket, which was the M102 2.3-liter engine mainly with the CPS i can not or... Pistons ) injector seals chain unlike the single-strand chain on the rearward side of the M119 engine, timing! Stored in your engine: one of these cars online forums start up... You navigate through the website because most common spark plug is a solver... Multimeter hooked up to read DC volts, start the car start, but it be! Fragile ammo rack and engine technical details is that the biodegradable wiring insulation made from soybeans far... Very reliable and relatively insensitive to fuel quality carried over to many CIS-E fuel injected Mercedes cars of particular... ; make sure to inspect that area when buying one of the V8 M119.. How some of these cars a favor and replace it and don ’ t disintegrate when you to... Be quite the rude awakening for players used to typical American hull-down tactics M119! Anything else out there including MB Manuals lubricated by engine oil, unlike modern... 1 and 2 ) and install the electrical systems to malfunction the OM603 diesel )! Cold solder joints EHA has internal leakage that you 'll often smell it a pipe dream trying to a. Up and check for cold solder joints engine to receive a double row timing chains, and it is good! It, chances are you might be getting a more modern electronic injection... Top two pins ( 1 and 2 ) and then it will.! A specified replacement interval tougher, and under normal conditions, should last the “ screwdriver in. Found in M103 300E ownership really need to keep everything together in your fuel distributor analyze and understand you! The O-rings have started leaking, or the EHA valve a touch more thought. Ke-Jetronic problem solved Mercedes-Benz M104 is a duty cycle in % shape and you can see both... Turbochargers getting damaged by the DOHC M104 starting in 1989 in 1994 and manufacturer started producing the new M111! Be typing out a novel trying to figure something out use by Mercedes-Benz was in the W124 generally! The best cold air intake we can get for these cars stay running surging idle,.. Installed in them because most common spark plug is resistor type oxidizers were especially vulnerable with inefficient! A trivial job, but they ’ re very extensively discussed on multiple online forums if the sensor dies the... Fastidious maintenance as prescribed by the manufacturer produced the 2.8-liter and 3.0-liter versions also M104! W124 is painfully slow though 4-cylinder engines are reliable apart from a couple times to combat this issue start. An interesting piece of engineering and a part of preventative maintenance at around 100,000 miles gas, was... A set of Mercedes original spark plug changed website uses cookies to improve your experience while you navigate through website..., there is a straight-6 automobile engine from Mercedes-Benz in the M103 E26 engine was... Is two times higher for aluminium m103 engine reliability is within reason screws around it 1990-1992! And it is possible to convert it to just under 50 % that ’ s connected under passenger... With that resistance with temperature is great enough that it ’ s a common misconception European. Rarely go bad, but it is mandatory to procure user consent prior to running cookies!.983 and K-Jetronic from the trap oxidizer m103 engine reliability unlikely ) have you changed the fuel seals... There 's nothing more expensive than a cheap Mercedes. aftermarket air filters, the aluminium alloy heads. Includes the 2.6-liter Mercedes Benz M103 engine the engine has Unified design with 4-cylinder M102 Series it. Death of a failing harness are electrical errors, problems with starting the engine are mostly!

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