Mercedes-Benz OM602 engine
The five-cylinder 602nd is a diesel engine from Mercedes-Benz. It belongs to the generation of new units, produced since 1988. Since that time, several different versions of this engine have been developed.
Technical data OM602
| Engine capacity | 2.5/2.9 liters |
| Maximum power, hp | 88-126 |
| Maximum torque, N * m (kg * m) at rpm. | 231(24)/2400; 231 (24) / 2800 |
| Fuel used | Diesel fuel |
| Fuel consumption, l / 100 km | 7.9 – 8.4 |
| engine's type | Inline diesel 5-cylinder |
| Gas distribution system | SOHC |
| Cylinder block | cast-iron |
| Cylinder head | aluminum |
| Turbocharging | depends on modification |
| CO2 emission in g / km | 199 – 204 |
| Cylinder diameter, mm | 87 |
| Number of valves per cylinder | 2 or 4 |
| Maximum power, h.p. (kW) at rpm | 126 (93) to 4600 |
| Supercharger | Turbine |
| Compression ratio | 22 |
| The piston stroke, mm | 84 |
Modifications
Consider the well-known modifications of OM602.
- 912 - a power unit with a displacement of 2497 cu. see. It develops a power of 94 liters. With. There are 2 valves per cylinder.
- 911 - the same working volume, but the power is higher - 90 liters. With. There are 4 valves per cylinder.
- 962 - a version of the engine with a turbine, with the same volume, but already developing 126 hp. With. Valves per cylinder 2.
Detailed characteristics of the modifications are given in the table below.
| 602.911 | 2497 cu. cm, power 90 hp (66 kW) Australia, USA, Japan |
| 602.911 | 2497 cu. cm, power 94 hp (69 kW) |
| 602.912 | 2497 cu. cm, power 94 hp (69 kW) |
| 602.930 | 2497 cu. cm, power 94 hp (69 kW) |
| 602.931 | 2497 cu. cm, power 84 hp (62 kW) |
| 602.938 | 2497 cu. cm, power 94 hp (69 kW) For Gelaendewagen, 24V electrical system. |
| 602.939 | 2497 cu. cm, power 94 hp (69 kW) For Gelaendewagen, 24V electrical system. |
| 602.940 | 2874 cu. cm, power 95 hp (70 kW) |
| 602.941 | 2874 cu. cm, power 88 hp (65 kW) |
| 602.942 | 2874 cu. cm, power 98 hp (72 kW) |
| 602.946 | 2874 cu. cm, power 95 hp (70 kW) |
| 602.947 | 2874 cu. cm, power 98 hp (72 kW) For Gelaendewagen, 24V electrical system. |
| 602.948 | 2874 cu. cm, power 97 hp (71 kW) For Gelaendewagen, on-board network 24V. OM 602 D29 |
| 602.961 | 2497 cu. cm, power 122 hp (90 kW) turbocharged. OM 602 A. USA, Japan |
| 602.961 | 2497 cu. cm, power 126 hp (93 kW) turbocharged. OM 602 A |
| 602.962 | 2497 cu. cm, power 122 hp (90 kW) turbocharged. OM 602 A. USA, Japan |
| 602.962 | 2497 cu. cm, power 126 hp (93 kW) turbocharged. OM 602 A |
| 602.980 | 2874 cu. cm, power 122 hp (90 kW) turbocharged. OM 602 DE LA |
| 602.981 | 2874 cu. cm, power 122 hp (90 kW) turbocharged. OM 602A DE 29LA |
| 602.982 | 2874 cu. cm, power 129 hp (95 kW) turbocharged. OM 602 DE LA |
| 602.983 | 2874 cu. cm, power 122 hp (90 kW) turbocharged. OM 602A DE LA |
| 602.984 | 2874 cu. cm, power 122 hp (90 kW) turbocharged. OM 602A DE LA |
| 602.985 | 2874 cu. cm, power 122 hp (90 kW) turbocharged. OM 602A DE LA |
| 602.986 | 2874 cu. cm, power 122 hp (90 kW) turbocharged. OM 602A DE LA |
| 602.990 | 63 KW (86 HP) |
| 602.994 | 72 KW (98 HP) |
Service regulations
The OM602 motor needs periodic maintenance.
- Every 15 thousand km, change the oil and filter, as well as lubricate the working systems.
- Once a year, renew the brake fluid, clean the drains.
Cars in which it was installed
The engine was installed on Mercedes C, EG class, as well as on Sprinter vans and onboard platforms. See the table below for details.
| W201 C-class | Base sedan |
| S124 E-Class | Station wagon on W124 chassis |
| S210 E-Class | Station wagon on W210 chassis |
| W124 E-Class | Base sedan |
| W210 E-Class | Base sedan |
| G460 G-Class | gel car |
| G461 G-Class | gel car |
| G463 G-Class | gel car |
| SPRINTER 3-t | van (903) |
| SPRINTER 4-t | flatbed/undercarriage (904) |
| Valixen | Who will tell you the features of the operation of a diesel engine from a Mercedes OM602? What does he love, what does he not? |
| Witch | Motors, like all diesel engines, are sensitive to temperature i.e. the first thing that should always be in good condition in these diesel engines is its cooling system. Any of the OM motor range should work at an operating temperature of 85 degrees !!!! No more, no less, and it doesn’t matter what is +30 or -30 outside the window - this is a guarantee of his health ... When underheated, there will be a loss of power and gradual coking of soot, when overheated, like everyone else, increased CPG wear or curvature of the block head. And second: in view of the fact that there are practically no electronics on the motors, they are extremely sensitive to any kind of air leaks, either through the intake manifold or through the fuel equipment. It can greatly affect the start and uniformity of the motor. A good half of the engine control actuators (especially turbodiesel) are controlled by pneumatics !!!! |
| Nikolai Vorontsev | One of the weak points (in my opinion) is the return line of the fuel line, as it is assembled from pieces of a rubber hose and what year it is and how many thousand kilometers it has traveled, the owner usually does not know ... He usually learns about its existence when clubs are knocked out from under the hood evaporating solar oil. From the outside, it doesn't look very good. |
| Sanya57 | This family does not like a sharp or ragged driving style. Driving with a tachometer in the red zone is contraindicated for this family. The element of these motors is a calm, unhurried movement from point A to point B. |
| Zamers Gelent | the motors seem to be eternal, but the nozzle sprayers still sometimes need to be changed too, since it’s not difficult to do, and they cost a penny. During maintenance, it is possible to add unscrewing the glow plugs at least once every 30-40 thousand km, because over time they refuse to unscrew completely, and getting a broken glow plug out of the head is not easy ... .. |
| Intellectual | The beauty of these motors is that they are iron and without the notorious electronics. Serviceable motors start easily and effortlessly even at -35, the main thing is that the diesel fuel does not freeze and the battery is alive, the rest of these motors are on the drum ... |
| Evolution | Thanks for the info, interesting, I thought there were no people on this forum who loved whirlwinds, but it turns out there are! |
| Yaroslav76 | Well, not so quiet OM602TURBO is pretty good, but OM606TRUBO is generally a hurricane |
| Intellectual | OM601,602,603, which are both atmospheric and turbo, differ in slightly noisier operation, even greater reliability, and these motors have a high-pressure fuel pump with a fully mechanical control, which allows you to continue moving even with a faulty generator and battery. On motors with a vortex chamber principle of operation, which were installed on the W210 sensors and a more complex EGR system, which adds a little smut. On OM604605606, candles of a greater length are used than on OM601602603, which leads to their strong coking, but they coke only when driving for a long time with faulty glow plugs, that is, when the candle is not working, the diesel fuel does not burn out and the slag sticks around the candle ... and then it will be very difficult to unscrew it ... Therefore, the candle burned out, it must be changed immediately and, if possible, change all the candles at once, so as not to disassemble the intake manifold every time, because if one burns out, others will soon start to fly ... checked, and the machine, you, the mersovods will only say thank you at startup =) |
| Victor | Best of all OM 602.982. The main difference from the 604/605/606 series is that it is a direct injection turbodiesel!!!! those. fuel is injected not into the prechamber (located in the block head), but directly into the cylinder (into the piston). The motor can be called the progenitor of modern CDI motors, with the only difference that direct injection is implemented on MECHANICAL !!!! BOSCH distributor type injection pump. It has the following characteristics: 5 cylinders in a row, volume 2874 cm 2, 129 valves per cylinder, rated power 300 l / s, torque 210 Nm. The motor has, even by today's standards, outstanding efficiency .... W8 with such an engine and automatic transmission is easy to put in 8,5-100 liters / 602 km. The motor was assigned to the 124 series, which was installed on 201, XNUMX bodies, but in fact with the engines of the previous generation they only have in common the number of cylinders, their location and the number of valves per cylinder ... Everything else, and most importantly, the principle of mixture formation is DIFFERENT !!! |
| Valixen | Why is 602.982 so interesting? |
| Victor | The Bosch company probably jumped over itself at one time. This engine implements fuel injection in two stages (with the so-called pilot injection), i.e. at the moment of the compression stroke (at the very beginning) the first small part of the fuel charge is injected into the cylinder, and at the end of the compression stroke the second injection (main) ...... THIS is why the engine runs much quieter than the 604/605/606 series, in which the entire portion delivered in one go... This is the main difference from all other diesel engines with mechanical pumps, which has determined a lot of positive aspects: 1. With a low specific power per volume, the motor has a very high torque of 300 Nm (for comparison, in the 606 motor with a power of 177 l/s, torque moment 310 nm). 2. Due to the power system, the principle of which is described above, we have very low fuel consumption!!! Even compared to the 604/605/606 series. 3. Again, due to the power system, the motor can be called completely silent..... After warming up, the noise of the motor can be lost against the background of the sounds emitted by the city... And this is really a fact. The motor runs so quietly that the level of noise emitted can compete with modern engines, and I’m afraid it will wipe the nose of some!!!! 4. Very high reliability of the unit. With proper maintenance, the engine can easily run 500-600 thousand km. This engine came to the 210 Mercedes from a commercial vehicle, namely from a SPRINTER!!! Where, where, but in “commerce” bad units do not take root well. There are legends about 602.982 on the Sprinter, and the reviews are only positive... |
| Dawit | But no one has canceled the disadvantages: 1. Low power and very high torque required a very strict collar from the motor...... Maximum engine speed is 4500 rpm!!! The main work is in a very narrow range of 1500-3000 rpm. Driving is somewhat reminiscent of driving a truck... Shots before the cut-off are contraindicated for the engine... STRICTLY CONTRAINDICATED!!!! Calm, but powerful and confident acceleration with torque is the element of this engine. 2. The engine is demanding on fuel quality.... Electronically controlled fuel injection pump, double the injection pressure (compared to the 604/605/606 series), first cylinder injector with sensor!!! 3. Most 210s with these engines drive in emergency mode!!!! Simply because no one knows this motor, and most importantly, no one knows how it is diagnosed and repaired... Everyone expects that 129 l/s should not go, and they drive like that, completely forgetting that the engine produces 300 nm of torque, and this is a lot, in fact a lot... For this, look for a good service.... |
| Janik | It will sound strange, but if you don’t find an intelligent master somewhere nearby who will know firsthand what 602.982 is, then love with this motor may not work. He will not reveal his secrets if there is even the slightest jamb in electronics. It is in the motor, but there are not many diagnostic tools for this particular motor. In addition to the old diagnosis, the other means are not very good !!!! Sensitivity to air leaks into the fuel system was inherited from its predecessors (meaning engines with mechanical injection pumps) With glow plugs, everything is the same as the 604/605/606 series ... At the slightest malfunction of the system, change it urgently ... delaying the replacement of a faulty candle, you can subsequently get to expensive repair! |
