The power unit UMZ-417 is a classic engine with four in-line cylinders. A common crankshaft is used to activate the pistons. The engine is equipped with a carburetor, a contact distribution of fuel supply and a gas distribution device of the OHV type, in which the lower location of the camshaft is provided. Consider its characteristics and features.
Description
The UMZ-417 motor has an aluminum cylinder head and a housing. Cast iron sleeves are fitted into the block by means of rubber o-rings. This design refers to the negative aspects of the engine, since it reduces its strength.
The considered power unit is an improved version of UMZ-4141, has a similar configuration with the motor ZMZ-402. Differences of UMP-417 from its predecessor:
- Enhanced compression.
- Another type of camshaft.
- The presence of enlarged intake valves.
- Increased compression ratio.
Some modifications of this engine are equipped with a 421 series crankshaft , installed without stuffing box seals. Only cylinder liners are distinguished from ZMZ motor, which are placed with the help of copper gaskets, providing additional unit strength.
Modifications
Several variations of the engine under consideration have been developed. The most popular among them are the following modifications:
- UMP-417.10. This engine runs on AI-76 fuel and was installed on UAZ vehicles under the 3151 index.
- Version 4175.10 - mounted on GAZelles, has increased power indicators up to 98 horsepower. The engine compression is 8.2, which is enough to use gasoline with an octane rating of 92.
- Modification 4178.10 - is considered the most common model, equipped with a carburetor with a pair of cameras, allows you to operate the cylinder head from the 421st UAZ. In addition, the crankshaft of this model is equipped with an oil seal, and additional interaction is allowed with a hydraulic power steering or clutch diaphragm.
Technical characteristics UMZ-417
The following are the parameters of the technical plan of the considered power unit:
- The working volume is 2445 cc.
- Power - 92 “horses”.
- Revolutions - 4000 rotations per minute.
- The number of cylinders is 4.
- The movement of the piston is 92 mm.
- Compression - 8.2.
- The volume of the oil tank is 5.8 liters.
- Lubrication system - complex type (spray plus pressure).
- Fuel consumption - 10.6 l / 100 km in mixed mode.
- Cooling is a forced-type liquid unit with closed ventilation.
- Weight - 166 kg.
- The working resource is 150 thousand kilometers.
Service and faults
The UMZ-417 engine is uncomplicated in prevention and maintenance. Periodic replacement of engine oil (every 10 thousand km) and adjustment of thermal clearances on the timing valves (after 15 thousand km) are required.
Possible engine malfunctions are listed below:
- Extraneous noise or knock during operation of the power plant. This can be affected by unadjusted timing valve clearances, deformation of the connecting rod bearings, and malfunctions in the camshaft of the assembly.
- Sensible vibration when starting and running the motor. Among the reasons: imbalance of the connecting rod-crank unit, improper carburetor adjustment, failure in the contact ignition system.
- Motor overheating. This may be due to the breakdown of the thermostat, the appearance of an atmospheric plug in the cooling circuit or a malfunction of the water pump.
Modernization
The UAZ UMZ-417 carburetor engines are often subjected to improvement, which is aimed at increasing the power of the unit. One way is to replace the existing unit with an injection system. The cost of such an alteration is not always justified, since it is easier to purchase a new engine with distributed injection.
Among other ways of modernizing the motor under consideration, moments such as:
- Balancing the piston cylinder assembly.
- By milling the head of the block up to 95 millimeters, the compression is increased to an indicator of 9.2.
- Change of the existing full-time camshaft to an analog with a narrow-phase profile.
- Completion of grooves of exhaust strokes up to 39 millimeters with the installation of suitable timing valves.
- Installing the exhaust manifold from the 421st model.
- Replacing the exhaust pipe with a 51 mm diameter version.
These manipulations will increase the power of the power unit to 100 horsepower.
Repair UMZ-417
The repair of the motor in question is divided into current and capital repairs. In the first case, the individual parts are restored or replaced. The capital part provides for the complete restoration of engine values to nominal values, by completely overhauling the installation. This will require disassembly of the motor.
The reasons for the overhaul of the UMZ-417 engine:
- Significant reduction in engine power.
- Reduced oil in the lubrication circuit.
- A noticeable increase in oil consumption (from 450 grams per 100 kilometers).
- Powertrain smoke.
- Increased fuel consumption.
- Extraneous noises and sounds during operation, as well as a decrease in the degree of compression.
Total
Carrying out repair work with this motor, you should adhere to certain rules. During disassembly of the power unit, it is necessary to check each element for wear and the possibility of its further operation.
It is possible to restore the engine's working life by completely or partially replacing worn parts or by reanimating them, if this is rational. The most common replacement parts are the connecting rod and main bearings of the camshaft, valve seats, bushings and other active parts.
Carrying out repair work, it is necessary to remember about standard clearances and tension of the timing. The deterioration of these indicators leads to disruption of the interaction of the rubbing parts, their poor lubrication. This leads to accelerated wear of the elements. Do not forget to put marks in the places of the subsequent installation of still suitable spare parts.
It is worth noting that a reduction in control dimensions is also unacceptable, since it leads to a deterioration in the heat transfer of the pistons and bushings. This leads to excessive overheating. Before starting work, the UMZ-417 power unit should be cleaned of impurities and washed. The process itself is preferably carried out on a rotary stand.