In detail: do-it-yourself a 01 engine repair from a real master for the site my.housecope.com.
FEATURES OF ASSEMBLY AND DISASSEMBLY OF MAIN UNITS AND MECHANISMS OF A-01, A-01M and A-41 ENGINES
When assembling the cylinder block and the crank mechanism, the following rules must be followed:
1. When putting rubber O-rings on the cylinder liner, they must not be twisted in the grooves. The rubber rings and the lower seat belt in the cylinder block (0151 mm) must be lubricated with diesel oil, otherwise the rubber rings may be damaged when installing the liners in the block. The lead-in chamfer on the lower landing belt in the cylinder block must be flat, clean, without nicks.
The ovality of new cylinder liners with the cylinder head fixed should not exceed 0.03-0.05 mm.
2. Before assembling the piston with the connecting rod and the pin, the piston should be heated in an oil bath to a temperature of 80–100 ° C. It is prohibited to press the piston pin into the piston in a cold state.
The connecting rod with the piston must be assembled so that the combustion chamber is displaced towards the long connecting rod bolt. When installing a piston with a connecting rod in the cylinder block, the chamber in the piston must be displaced from the axis of the cylinders in the direction opposite to the camshaft.
3. Compression rings must be installed on the piston with bevels upwards, it should be borne in mind that the upper ring is chrome-plated, and the rest is non-chrome.
Large deformations of the rings must not be allowed when they are installed in the piston grooves, therefore it is recommended to use a special
the device shown in figure 19, which limits the expansion of the rings to an outer diameter of 142.5 mm.
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4. When installing a piston with piston rings in a cylinder liner, a technological tapered mandrel ("false liner") should be used to avoid damage to the rings, as shown in Figure 20.
5. It is necessary to remove the liners from the cylinder block using a puller (Fig. 21), which is inserted into the inner cavity of the liner.
6. Before installing the parts of the piston group in the engine cylinders, the locks of the adjacent piston rings should be located at an angle of 120-180 ° relative to each other. The rings installed in the piston grooves must move freely in them under the influence of their own weight.
The radial clearance between the rings and grooves (when they are covered by a cage with a diameter of 130 mm) must be observed within the following limits (Table 4).
7. When laying the crankshaft into the cylinder block and installing parts of the connecting rod-piston group, it is necessary that the number (standard) of the production (1H, 2H) or repair (PI, P2, РЗ) size of the connecting rod and main journals of the crankshaft correspond to the number ( standard) earbuds.
It is not allowed to install the shaft and bushings of different sizes, as this will lead to seizure of the crankshaft.
Before assembly, it is necessary to clean, flush with kerosene or diesel fuel and blow with compressed air the oil cavities and channels in the cylinder block, crankshaft and in the connecting rods. Nicknames, dents, burrs and marks must be carefully cleaned out. The beds and external surfaces should be wiped dry, and the crankshaft journals should be lubricated with a thin layer of clean diesel oil.
It is forbidden to scrape the liners, file the main bearing caps, put any gaskets between the liner and its bed and between the bearing connector planes, move the connecting rod caps from one connecting rod to another or turn them over, move the main bearing caps from one place to another.
When assembling the piston group and the crankshaft, use wooden or copper hammers and drifts.
eight.It should be borne in mind that tightening the connecting rod bolts must start with a long (tight) bolt. Otherwise, this can lead to a violation of the seating of the spline joint and deformation of the connecting rod bed.
Do not reuse connecting rod bolt lock washers on engine bulkheads and do not use homemade lock washers.
9. It is recommended to tighten the nuts of the main bearing caps in the order shown in Figure 22, in two steps with a torque wrench, using a tightening torque of 41-44 kgm. Install bearing caps in accordance with the numbers stamped on them.
10. The nuts securing the cylinder heads to the block must be tightened in the order shown in Figure 23, in two steps (preliminary and final).
When the engine is cold, the tightening torque of the nuts
fastening of cylinder heads should be 16-18 kgm, in hot - 18-20 kgm.
11. If it is necessary to disassemble the balancing mechanism, use a bearing puller to press out the bearings (fig. 24).
To do this, unlock the bolts 11 (see Fig. 18) fastening the plates 8, unscrew them and remove the plates. Then, with a light blow of a hammer or a punch on the end face of the load-gear axis, move the load to either side until it stops against the inner walls of the mechanism body. Under the influence of the displacement of the load, the outer bearing races will be pressed out of the bore of the mechanism case. Then press out the outer bearing race with a puller. Then press the inner cage with the same puller, and then remove the gear weight from the case.
Assemble in reverse order. It is recommended to press on the bearing simultaneously into the housing and onto the journal of the load-pinion.
It should be borne in mind that the outer ring of bearing No. 12507KM is fitted to the inner race and is not interchangeable with other bearings.
When installing the balancing mechanism on the engine, the marks of the gears and the crankshaft rim must be aligned. After installing the mechanism with the position of the piston of the first cylinder in V. m. t. gear weights must be turned downward with an accuracy of ± 5 °.
When installing the balancing mechanism on the engine between the mechanism body and the cylinder block mating plane, it is necessary to install shims, with the help of which they provide the lateral clearance between the teeth in the meshing of the gear-weight with the crankshaft rim (0.25-0.4 mm on the dipstick). Violation of this clearance during assembly, both in the direction of decreasing and in the direction of increasing it, can lead to increased noise in the meshing and emergency wear of the gear teeth.
The build quality of the balancing mechanism is checked by manually turning the weights in the bearings. The gears must return to their original position under the action of their own weight.
The assembly of the cylinder heads begins with the installation and grinding of the valves. The valves are installed in the guide bushings, while the valve should fit into the bore of the bushing easily, under the influence of its own weight. Then the valve is lapped until the required tightness of the tapered chamfer of the socket (or seat) of the cylinder head and valve is achieved.
After lapping the valves, the head is cleaned of lapping paste and washed.
It is recommended to disassemble and assemble the valve mechanism using a tool (Fig. 25).
For the convenience of dismantling the nozzle cup (when replacing the rubber ring or copper gasket under the cup), you can use a puller (see Fig. 108). When replacing the studs, use a stud driver (fig. 26).
The flywheel mounting bolts, connecting rod caps, the pinion bolt on the camshaft, the pusher axle support bolts, the rocker arm axle struts fastening nuts should be securely locked. In this case, the antennae of the washers should fit snugly against the edge of the bolt or nut. In the case of a blockage with a wire, it must be pulled in the direction of wrapping.
When pressing frame oil seals (cuffs) into body parts (flywheel housing, gear housing cover, cylinder head cap), the oil seal must not be skewed and chipped on its surface.
The sealing lip must be even and smooth. Before installing on the shaft, the gland surface must be lubricated with US grease (grease) or CIATIM-201.
All gaskets must be free from crinkling and tearing.
Rice. 19. Tool for removing and installing piston rings:
1 - case; 2 - screw; 3 - cover; 4 - spring; 5 - earring: 6 - handle; 7 - Axis; 8 - crackers (sponges).
Rice. 20. Tapered mandrel for installing the piston in the cylinder liner.
Rice. 21. Extractor for removing cylinder liners from the block:
1 - disk; 2 - earring; 3 - screw eyelet; 4 - screw; 5 - distance sleeve; 6 - bar; 7 - handle.
Overhaul of an engine is a set of repair work of an internal combustion engine unit aimed at improving the condition of the entire engine as a whole. The word overhaul means that such a repair is serious, requiring good theoretical and practical knowledge. Also, work to improve the condition of the engine is called the internal combustion engine capital.
Overhaul is a complex of repair work related to the replacement of parts that cannot be repaired (mainly pistons, rings, gaskets) and the repair of parts that can be restored to factory condition. After overhaul, the engine restores its power performance indicators (power, compression, noiselessness and smooth operation). Unlike the current or unscheduled (this, for example, the washer fuse blows out or the rear window heating 2107 does not work), overhaul involves the repair of the entire engine, and not individual parts. Therefore, this type of work costs decently, requires experience, time and, preferably, a warm, well-lit garage, if the driver wants to make capital with his own hands.
Since the motor is the heart of the vehicle, it must be repaired in compliance with all rules and regulations, accuracy and skill.
Both gasoline and diesel engines burn out their resource after passing their assigned resource in engine hours (if the engine worked for 1 hour, this is 1 engine hour) or after running in thousands of kilometers.
- You have to top up the engine oil, it goes somewhere.
- Mechanical damage to the engine (crack in the block).
- The compression in the cylinders is below the permissible level.
- Continuous smoke from the muffler is blue or gray (dark gray) thick in large quantities.
- Knocks are heard (this could be the earbud twisted, etc.).
- The car does not pull as before, especially uphill.
- When checking the candles, they are constantly dirty, with carbon deposits, in oil.
- Fuel consumption has become more than it was.
- A lot of gases get into the crankcase.
- Low oil pressure in the system.
- The motor overheats under light loads.
- The engine runs intermittently.
These reasons do not necessarily indicate the need for a major overhaul of the internal combustion engine. If there are many such signs and they are repetitive, then it's time to give the car for capital or do it yourself.
- current or in-line repair (repair or replacement of individual parts, for example, painting a bumper);
- technical repairs according to the schedule (repair or replacement of worn-out parts that have exhausted their resource);
- unscheduled repair of the internal combustion engine (this is when the resource has not yet come out, but the engine for some reason has broken down);
- overhaul or overhaul, or capital is done both according to the schedule after the expiration of a given resource, and after the final breakdown.
The mileage resource for average cars is considered to be about 200 thousand km, after passing which its characteristics decrease and it is time to make capital. There are cars with a resource of 1 million km (they call engines million-strong), although now there are rumors that the resource of new expensive cars, which used to be million-strong, now have a much smaller resource. The more often a car is repaired, the more profitable is the finances of auto manufacturers and auto parts stores, but this spoils the reputation of a brand or a specific car model.
In some cases, with severe wear of the internal combustion engine or severe breakdowns, it is more advisable to swap the engine.
The manufacturer Avtovaz has set the average mileage for VAZ 2114 cars = 150 thousand km. On average, all Russian cars have the same indicators. But, if various problems are eliminated in time, the resource of the motors can easily withstand 250 thousand km. The resource of engines of foreign cars, on average, 200,000 - 300,000 km before overhaul.
Overhaul of diesel and gasoline engines is done in stages:
- Dismantling the internal combustion engine.
- Parts washing and cleaning.
- After cleaning, an experienced auto mechanic is able to determine how much worn out certain parts, whether they can be repaired or is it better to replace them. Troubleshooting is done, that is, after the cylinder head (cylinder head) has been removed, it and the cylinder block (cylinder head) are checked for chips and cracks; examine the cylinders for scuffs and scratches; determine the clearances of mating parts; inspect the condition of the pistons for chips, shells, carbon deposits; inspect the crankshaft connecting rods; internal combustion engine crankshaft research; fingers; bearings; parts of the gas distribution mechanism are also checked (valves, rocker arms, etc.). They also compare the dimensions of important parts with the factory ones.
- After troubleshooting, it is necessary to assess the degree of wear of the entire engine: what to change, what to leave, what to repair.
- If you have never had to completely disassemble the engine, then it would be more correct and better to invite a friend who understands.
- Disassembly is desirable in a warm and well-lit garage.
- During disassembly, put all bolts, washers and nuts in a box with partitions, do not throw everything into one bucket.
- During disassembly, remember the sequence if you are doing this for the first time.
- If you do not know what the parts are called, take the old parts to the store and show them to the seller.
In our do-it-yourself engine overhaul guide, here is the following sequence of actions:
- Dismantling and disassembly.
- Troubleshooting details.
- Flushing disassembled parts.
- Order and purchase of spare parts.
- Block and crankshaft grinding.
- Block head repair.
- Verification work.
- ICE assembly and installation.
- Running in after capital.
- Conclusion.
Depending on the make and model of the car (engine design, number of cylinders, type of gearbox), the process of dismantling the engine may differ. The arrangement of the engine on front-wheel drive and rear-wheel drive is also different.
Carburetor engines are much easier and faster to disassemble, since they are not crammed with electronic devices, in the presence of which, in order to get to the engine itself, you have to carefully dismantle them all.
So, if Kamaz has to make capital, for example, then its diesel engine from the Yaroslavl plant YaMZ-236 will take about 10 hours to dismantle. If you do the same work with heavy-duty analogs of Kamaz, it will take more than 30 hours.
And it takes about 3 hours to disassemble the VAZ engine. And the engines of foreign cars will take about 10 hours.
It is necessary to disassemble slowly, throwing bolts and nuts everywhere. With disassembly, diagnostics have already begun, so to speak.
Defect detection in this case is mechanical, that is, it is necessary to check visually and using measuring instruments the wear of parts.
- inspect the crankshaft and measure its dimensions, check for bends and alignment;
- inspect the cylinder block body (BC);
- check the parts of the connecting rod-crank mechanism for backlash and the condition itself: pistons, cylinders, rings, fingers, connecting rods;
- inspect the cylinder head housing (cylinder head);
- parts of the gas distribution mechanism;
- determine the maintainability of parts and assemblies.
Many people neglect such work as washing the motor. It is advisable to rinse each part and clean it of plaque so that the degree of wear can be determined, and also rinse the cylinder head and BC to detect macrocracks, if any.
After completing the procedure for troubleshooting and screening out those that are fit for restoration and that are not fit, it is necessary to order new parts to replace the unusable ones.When you already know what parts are needed, there is no need to delay with their order and purchase, since new parts still need to be prepared for installation.
- Liners (main and connecting rod).
- Details of the piston group.
- Crank pins.
- Connecting rod bushings.
- Valves (all, both intake and exhaust).
- Oil scraper rings.
- Gaskets (complete set).
- Valve guides and seats.
- Pump with a repair kit.
- Oil filter and pump.
- Other incidental details.
After the issue of spare parts has been resolved, they begin to repair and restore the block and the crankshaft of the internal combustion engine. On a milling and surface grinding machine, the layer of the seat of the cylinder head and the block itself is removed until there are no cavities and chips left. It so happens that there are several deep shells, because of which you have to remove layers in several passes. Usually, depending on the degree of damage, layers are cut off with a thickness of 1 mm, 0.5 mm, 0.25 mm, 0.1 mm, 0.05 mm. After that, they begin to grind the surface to a mirror finish.
There is a special table for grinding the crankshaft, which shows the values of thickness and efficiency after repair in comparison with a new factory one.
Please tell me, I want to disassemble the engine. but 41 repairs, something pressure jumps, what features and what you need to pay attention to when disassembling, repairing and assembling the engine, thank you all in advance!
Does the pressure sensor work? The pressure doesn't just jump. It is either always low or normal.
Please tell me, I want to disassemble the engine. but 41 repairs, something pressure jumps, what features and what you need to pay attention to when disassembling, repairing and assembling the engine, thank you all in advance!
Hello colleague, is the pallet crumpled?
Perhaps the intake in the pallet is unscrewed from trembling, I had this.
I will be noted
Let's take it apart, don't be afraid, here on the forum the guys are normal, they will always tell you if anything. I just bought my own, as I bought the tractor, I didn't even start it, I immediately disassembled it. During the winter I grinded the shaft, bought spare parts, I'll start assembling in two weeks, just for a couple and we will.
The guys will assemble the engine take a photo review what and how