UMP-421, engine: specifications

The UMZ-421 engine has a rich history. There are several modifications of the specified device. They are actively installed on the machines of the UAZ series. Amplifiers in them are of vacuum type. If you believe the experts, the devices differ in high step. In this case, the tensioners are able to withstand heavy loads. In order to understand the engine in detail, it is recommended to consider its performance.

General Device Settings

Model 421 (engine) characteristics has the following: four cylinders, the diameter of the rings is 100 mm. The compression ratio is located at 8.2. At a frequency of 4000 revolutions, the device produces a power of 82.4 kW. The maximum torque is 221 ks per meter. The maximum speed is 2500 per minute. Specific fuel consumption depends on the type of modification.

Engine arrangement

Model 421 (engine) includes a cylinder block, a carburetor, and a pump. Additionally, a damper device is used. The drive is matched with a fan. In the lower part of the modification there is a choke. In addition, it should be noted that the model has a pass valve. The shaft at the engine is used in diameter of 2.4 cm. The connecting channel is connected to the hose. The locking unit is located at the top of the device. Under the carburetor is a filter. The tensioner for the modification is applied with the tank.

Oil-filling mechanism

The oil-immobilizer on model 421 (engine) is installed in the side of the device. The recirculation valve is designed for high pressure. The exhaust gases exit through the hole. To avoid block wear, a lining is used. The lower shank in the device is protected from gases. A hose is used to drain the waste oil. The filter in this case is absent.

Tire department

The connecting section at the engine is located under the central drive. It has two shafts that are connected through a disk. The valve in the device applies low pressure. The outlet tube is located under the carburettor. A partition is used for the partition. If we consider the engine UAZ-421, then it has a crankcase with a hose. In total there are three filters in the mechanism.

The fixing of the tank is carried out by means of clamps. If we consider the lower part of the modification, there are small holes. The upper shank in the device is fixed under the clamp. A lining is mounted on the engine mount. If you look at the top of the device, there is an air filter. Under it is the block for the connector. A shifter for the 421 engine ("Gazelle") is installed under the tank. It should also be noted that the model has hose connections, which are necessary for cooling the system.

Starter motor

The starter motor UMZ-421 is installed with a closing mechanism. In total, he has three blocks. Experts say that the model is able to work at a reduced speed. A contactor is used to short circuit the circuit. Three conductors are connected to the starter of the device.

Radiator devices

The radiator is connected to the starter. The connector for model 421 (motor) is placed under the block. Shkif in this case is applied to 3 mm. One hose leaves the expander. If we consider the upper part, then we must mention the presence of wire channels for the removal of gases. There are also special fixatives, which are attached to the nuts. In order to disconnect them, the keys are used. In this case, the shaft must be well fixed. After disconnecting the pump, it will be possible to inspect the starter.

Modification 421.10

The specified modification 421 (engine) characteristics has the following: maximum torque 221 ks per meter, the average speed reaches 2500 per minute. A model with an elongated pin is produced. It has a carburetor with a drive. Directly the valve is applied with a tensioner.

Also it should be noted that the device is allocated in a wide way. Considering the engine UAZ-421, you can see that he has a tensioner used with the tube. Channels are produced with overlays. Special attention in the modification deserves a modified starter. The filter is located in the front of the damper. If to speak about disadvantages, it should be noted that hoses from the carburetor often fly out. Additionally, there may be problems with the connector. In this case, it is fixed under the drive. The fan of the model is able to work at increased revs for a long time.

Engine 4215.10

The presented modification 421 (engine) is made with a ventilation case. The drive is applied to two outputs. If we talk about the advantages of modification, it is important to note that it withstands large overloads. The oil pump is of high quality, and the discharge tube is rarely contaminated. Also, experts point to the good conductivity of the channels. Nagar is rarely observed on them. The carburettor is standardly used with a rack. Also it is necessary to say that the connector is installed at the bottom of the engine.

Engine modification 4218.10

The introduced engine 421 (injector) is made with strong seals. Cylinders in this case are on the sides. If we consider the advantages of the model, then long channels deserve attention. The oil block in the device is well protected. Specialists point to the wide mouth of the modification. The radiator is used with additional racks. The air filter is fixed near the rack. In total, the model has three skiffs.

It should also be noted that the fan is able to maintain high revs. The pump is used with a connector. The tensioner is installed at the bottom of the engine next to the lever. The drive is fixed to the nut. In order to make the repair of the device, you will first have to remove the radiator. After that, it remains only to fix the upper pin and turn the bolt clockwise. The extender from the engine is removed with a key. The lining cover is selected in a small thickness.

Starter repair

The starter for this modification breaks down, as a rule, because of the disconnection of the contacts. In order to check them, the connector block is removed with a key. The next step is to inspect the surface of the tank. If oil leaks are visible on it, it is necessary to detect the broken hose. Also, the problem may be the shift of the tank. At the same time, the nozzle is closed.

The approach is inspected last. To disconnect the starter, it is necessary to prepare a Phillips screwdriver. In this case, you do not need to touch the hose. To unscrew the hoses, you can use a screwdriver. The first fastener starter is located near the expander. Hoses in this case are not to be touched. After removing the bolts, it remains only to remove the starter. This can be done independently without attracting the help of others. To check the operation of the contactor, the protective cover is loosened. If the clamping plates are loosely attached to the wires, they must be squeezed. You can do it manually.

Replacing the overlay on the connector

It is quite easy to replace the overlay on the connector. In the event of a leak, the engine must first be flushed. After that it is important to make sure that the problem is in the connector. Further, in order to repair the 421 engine, it is necessary to proceed directly to inspecting the part. To do this, you have to twist the upper shkif. The next step is to inspect the tank of the device. The cover of the model is removed using a key.

The screws at the engine are on the sides. It is worth noting that the lid needs to be lifted very neatly. The lining should not fail to the filter. Also it should be noted that you will have to hold the tank. The cover must be clean and elastic. If you see a darkening, then it will have to be replaced. After the operation, the lid is put in its original place. Fasteners wind up gradually. In this case, you must continuously monitor the position of the lining. If it is not properly tightened, then the cover must be removed again.