When the internal combustion engine is running on the valves, working edges are gradually produced. Consequently, all valves rise up with time. It is for this reason that it is necessary to adjust the VAZ-2114 valves. The design and drive on this car is much more reliable than on the machines of the classic series.
But still the frequency of checking gaps in the valve mechanism from 15 to 30 thousand km of mileage. If you do not check in time, then the heat gap can decrease, which will lead to the inoperability of the engine. The adjustment is also necessary to implement when replacing VAZ-2114 valves.
Basic signs of breakdown
When thermal clearances decrease or increase or increase, the driver can observe a number of symptoms. The machine can even stuck after warming up to the operating temperature (the metal is expanding when heated). Adjusting the VAZ-2114 is necessary in the following cases:
- A stranger appears from the valve
- When the power is significantly reduced, which is especially noticeable at high load.
- The engine is unstable.
- Sometimes it shoots and claps into the muffler.
- Significantly increases the consumption of gasoline, despite the fact that all sensors are in good condition and the power system is functioning normally.
If you notice one or more signs, you must check the valve status.
Preparation for adjustment
Before starting work, you need to install a car on a flat area, then squeeze the handbrake. It is also advisable to enable increased speed to prevent car rolling. The following should be done:
- Raise any front wheel with a jack. And install a reliable support under the car body.
- Disconnect the Sapuna hose.
- Disconnect the drive cable from the throttle of the throttle. To do this, remove the bracket.
But after that, it is necessary to measure the gaps of intake and exhaust valves between camshafts. On eight-flaped engines, this work is done very simply.
What should be the gaps
On VAZ-2114 cars, valve clearances must be as follows:
- graduation - 0.35 mm;
- inlet - 0.2 mm.
Permissible deviation of no more than 0.5 mm. Please note that the gap measurement should be carried out only on the cooled engine.
All valves that are checked must be closed. In order to understand that the valve is closed, you need to look at the camshaft. The cam located on it will be directed upwards. All exhaust valves are opposite the exhaust manifold. Intake valves are a little more diameter than final.
Verification of gaps
To check the gaps, you need to install the first cylinder into the upper dead point. Check must be carried out according to the following scheme:
First, it is necessary to check the gap value in the 6th and 8th valves, they are on the third and fourth cylinders. Probes must pass with a small resistance between the cam and the pusher. In the event that the probe does not enter or freely penetrates the gap, it is necessary to adjust. It is done with the help of a washer with different thickness.
How to adjust
In order to remove the washers, you will need a special design puller. It is sold at any store. It is not very big enough, so you can easily purchase it at any store. The adjustment procedure is as follows:
- Finish the puller tube on the valve cover fastening studs.
- Create a sickle part of the lever in the gap between the camshaft fist and the adjusting washer.
- Press the puller lever and blend the valve.
- Install the checkbox that is available in the puller kit, between the camshaft and the glass.
- After raising the lever up, remove the puck.
It can be pulled out as two flat screwdrivers and thin tweezers. The second tool is much more convenient to use. Note that it is undesirable to adjust the VAZ 2114 valves, if you do not have enough experience.
Selection of Shab
The most difficult effect in this work is to calculate the thickness of the new washers. According to the procedure for adjusting the VAZ-2114 valves, it is necessary to extract the washers and adjust the gap by the selection of new ones. The selection looks approximately as follows (the data is taken approximate, you will have others):
- Measure the gap between the valve and the cam. For example, it was 0.2 mm on graduation. And should be 0.35 mm.
- And the washer, which is installed in this valve drive, has a thickness of 3.4 mm. You figured out, removing it and looking at the bottom.
- You need to increase the gap by 0.15 mm. Consequently, you need to install a new puck, the thickness of which will be 0.15 mm less than that of old.
- The new washer must have a thickness of 3.25 mm.
If you have a value that does not multiple 5, you need to select the puck, the size of which is closest to the value to the calculated one. By the same principle, the selection of the washers on the remaining valves is selected. But is it worth making the VAZ-2114 valve adjustment yourself? If you have a big set of adjusting washers, you can perform this work yourself.
If you do not have such washers, it is better to leave this work to professionals. The cost of adjusting the valves is about 800 rubles. A set of washers of various thicknesses will cost you at least 2000 rubles. And it's not a fact that there will be one set. But if in your city the problem with good masters or you are accustomed to trust only yourself, you can buy several sets and many years not to know the problems with the setting of the valves.
VAZ-2114 is equipped with a 4-cylinder engine with an upper gas distribution mechanism (timing). Injector 8 The valve system of this model of machines is placed in the head of the BRG block drive on the timing.
In addition to sounds, noise emanating from the engine, there is a specific, which is characterized by a special base. The knuckle of the valve or impaired heat gap, occurs as a result of changes in the distance between cams and levers of the camshaft. And the more the clearance, the louder the sound. This parameter is the value regulated, and is subject to strict compliance.
Violation of the thermal clearance of valves can cause a knock
Where is the knock?
- Another cause of the knock is considered small gap . As we use, the fall in power with all the consequences, including. It is advisable to regulate no later than 15 thousand runs.
- The occasion of the basement in the timing unit can become detonation phenomenon . It is associated with incomplete ignition of a combustible mixture inside the combustion chamber.
- Often the reason lies in low oil pressure at elevated circulation . The launch of the "cold" engine also leads to a knock, especially if there is excessive retention of the pusher. The situation affects the oil supply (depleted) on the valve.
- Lubricant deficiency Also becomes a reason for a specific metallic knock with the subsequent burning of the valve, a reduction in power, an imbalance of the camshaft. The appearance of the knock obliges to check the MRM system, even with a smaller mileage, but after identifying the data of the gap.
- The reason for what low Quality gasoline (below AI 92). It is possible to fix the situation, the bay into the tank is the maximum amount of gasoline, for example, AI 95.
- The motive is also served violation of the ignition distributor . If later - leads to heating and loss of engine power. In the early corner of the advance, the knock begins to listen, especially on a cold engine.
The procedure for performing adjustment on the 8th valve
The procedure is not complicated and easily performed by the driver if there is at hand:
- Water wrench, cape, candle, end.
- A set of probe.
- Valve pressing device with a calibrated retainer.
- Adjusting washers (preferably kit).
- Rag.
Algorithm
The list of mandatory work provides:
- Stop the car on the site (better in the garage), give to cool the engine, preferably below 25 ° C.
- Disconnect from valve cover hoses, brackets, cover, camshaft drive belt. A visual inspection of it is carried out on the availability of worn places or other defects.
Remove the valve cover
- Unscrew the candlesIt will make it easier to turn the crankshaft and installation in the first cylinder NTC. This process is performed by lifting (hanging) front of the machine with the subsequent rotation of the front wheel or the crankshaft gear. It is done after installing 4 transmission of the checkpoint.
Unscrew the spark plugs
- In the exhaust manifold sector. Measure the size of the gap between the swing surface and the pusher. The thermal factor is considered a purely fixed parameter, constituting for inlet 0.2 mm, and 0.35 mm of graduation, with an error of 0.05 mm.
We combine the label of the gear of the camshaft with a risk on the head of the block
- Checking the correctly fixed gap is performed by the dipstick. On the first valve, the dipstick is introduced into the interval between the cam and the adjusting washer, the thickness of which varies within 3 ÷ 4.5 mm. The tool plate should take place with a weak effort. This is considered a normal option. Free entry or inability to push is considered evidence of the need for adjustment. If the dipstick does not climb, use the plate less thickness. The action is repeated until it passes with light friction. The difference between the nominal clearance and the thickness of the probe will give the required thickness of the washer.
Check the clearance to the diploma
- The process involves the valve compression, for which the device (at hand) is mounted on the block head stud. The lever should be placed between the cam and the plane of the washers. Pressing the knob to the device, the lever presses the pusher. The calibrated retainer is inserted into the gap, which holds the valve, leaving the loose washer. This item is removed by tweezers or something pointed.
With the help of the lever, press the pusher and insert the calibrated retainer
- Installation of the new part is made based on the laser tag, on the bottom of the extracted part, for example, 3.5 mm. In the absence of a label, the measurement is carried out by a micrometer. Check shows the clearance of the exhaust valve, for example 0.44 mm. The gap exceeds a fixed 0.09 mm. It became necessary to need a puck with a thickness of 3.94 mm. In a set of this size may not be. In this case, select the size close to the desired figure.
Install a new VAZ-2114 valve adjustment puck
- New washer stacked in place by tag down, in order to avoid abrasion. The lock is removed after pressing the valve. The operation proceeds to the next stage.
An important element of adjustment remains knowledge of the work of cylinders.
Upon completion of the first stage, the camshaft turns 180 ° (turnover floor) for checking 2 intake and 5 graduation. Turning another 180 °, 6, 8 is checked.
In the same method, work with 4 intake and 7 graduation are performed.
The procedure is completed by reverse installation of all parts taken. The cover of the cover is one-time item and is subject to replacement..
Video to adjust valves on 8 VAZ-2114 valve engine
Summary
- Exclude gasoline refueling below AI-92 than save the car from detonation phenomena.
- Check periodically ignition advance angle.
- Observe constantly under the pressure of the engine in the engine.
- Perform adjustment in accordance with the instructions for the car.
Nowadays, any modern car, in addition to electrical, has an internal combustion engine with a gas distribution mechanism. A lot of parameters depends on the service job of this system. And they include fuel consumption, motor pickup, environmental characteristics and other, equally important indicators. The normal function of the gas distribution mechanism provides proper adjustment of the gaps between the valve and its pusher.
If the gap is too large, then the camshaft camshaft will beat the pusher on the plate, and all this will lead to serious damage to the nodes and engine mechanisms. In addition, the valve will not fully open when it is necessary, thereby overlapping the movement of exhaust gases or fuel mixture, and depending on the type of valve. Intakers are responsible for filing fuel, graduation - for spent gases aimed at the exhaust collector.
Principle of operation of the valve mechanism
On the contrary, if the valve is strongly clamped, then mechanical damage to the parts of the motor will be smaller than with too much gap. But the engine itself works - it will be much worse. It is for good engine performance that needs to carefully adjust the valves on VAZ vehicles. This procedure is carried out in several ways. The first - the pusher is moved under the influence of the nut on the rod. The second is the selection of the washer of the gaskets of the desired thickness. The third - automatic, is adjustable under the pressure of motor oil into hydraulic compensators.
I exhibit the gap on the VAZ 2114
In our case, by car VAZ 2114, this procedure is made in the second way, using adjusting washers and a special tool.
First, it should be understood that the correct adjustment on the VAZ 2114 can be performed only at ambient air temperature in 20 degrees Celsius, when the metal is at rest, and is not subject to temperature expansion as a heated engine.
Secondly, for each specific car there is a table of the dimension of gaps when the camshafts raised camshafts.
The following dimension is used for the fourteenth model:
- For intake valves - 0.2 mm with an error of readings of 0.05 mm;
- For exhaust valves - 0.35 mm with an error of testimony of 0.05 mm.
Before adjusting, cool the space under the hood, you can use an ordinary fan. After that, dismantle the valve cover, nozzles, fastening clamps, side protective belt cover of the gas distribution mechanism. By revealing the accelerator pedal cable fastening nut, disconnect it gently. For the convenience of work, remove the air filter housing assembly. Before dismantling, refer to the wheels the anti-collective shoes and turn on the neutral gear. Manual parking brake should also be included.
Required tool
The tool that is needed for full-fledged work:
- 1. Keys horn and end;
- 2. The device to lower the plates of the valves - there is a little more than one hundred rubles;
- 3. A set of specialized probes for measuring gaps in the mechanism;
- 4. Micrometer to determine the thickness of the adjusting washer;
- 5. Adjusting washers - they have a thickness from 3 to 4.5 mm. They are supplied to the market with an interval of 0.05 mm. That is, you can find washers with a size of 3.05 mm, 3.1 mm and so on to 4.5 mm. (One washer has a cost of about twenty rubles).
Valve pusher with adjusting washer
Process adjustment
Check whether the labels on the gear of the gas distribution mechanism drive and on the cylinder cover of the VAZ 2115 cylinder head are stated. The same labels must match the crankshaft pulley and the oil pump cover. Next, you should unscrew the spark plugs to reset the pressure in the block cylinders.
Under the valve lid upon subsequent assembly, place a new gasket treated with sealant in the grooves.
VAZ 2114 valve arrangement
When adjusting, consider which valve is intake, and which graduation procedure is as follows:
5 - release and 2 - inlet;8 — release and 6 -inlet;4 — release and 7 -inlet.
Moving from the camshaft pulley, we freeze the gaps between the pusher and the shaft cam. In places where the clearance corresponds to the norm, we all leave unchanged. In place, where the probe, the corresponding size easily pushes into the slot, add the device to lower the pusher to the plate and insert the checkbox to fix the pusher. Then with special tweezers pull out the adjusting washer and look at its marking. If necessary, measure the thickness micrometer. Next, we select a thicker puck, put it in your place and check the gap first by the desired probe.
Clauses of valve
If he does not fit, then take the dipstick shorter, and so as long as the probe does not fit. According to the difference between the nominal size and size of the probe, which is easily placed, calculated the desired thickness of the adjusting washer. We repeat the procedure until the probe starts inserting into a slight pinching.
If no verification probe is suitable, it means that the valve is pulled !! According to the above operation, remove the adjusting washer and change it into a smaller size.
If there are valves on the VAZ-2114 1.5 or 1.6 for eight valves, this indicates that components need to be adjusted as quickly as possible. Unfortunately, not all car owners immediately begin to eliminate such a malfunction as it leads to more serious consequences. After all, if timely adjustment is not performed, the engine power will largely decrease, the valve will be perhaps, and the camshaft can generally be unbalanced. Do not know how valve gaps correctly adjust on VAZ-2114 8 valves? Then we recommend you to familiarize yourself with the information that will be presented next.
The size of the clearance is measured
You can simply adjust the valves on your own simply, if you precisely follow the instructions and perform the work in stages. Before starting, you should check the size of the gap, and if they do not correspond to the approved value, and the original knock will be heard at the operating engine, it means that the valves must be adjusted. To accurately check the size of the gap, it is necessary to wait for the complete cooling of the engine.
We should not forget that if the measuring device is installed on a hot metal surface, it will not be possible to reveal the exact size of the gap due to the error, which takes place when expanding the metal.
The size of the gap for both gas and gasoline must comply with such indicators:
- inlet valve - from 0.05 to 0.2 mm;
- exhaust valve - from 0.05 to 0.35 mm
The following tools will be required to work:
- rozhkov and candle keys, better to have a set of such keys at hand;
- a tool that helps to draw the pusher valves, its value does not exceed 150 rubles;
- a set of special probe;
- washers for adjusting a thickness of 3 to 4.5 mm;
- device called micrometer.
Phased adjustment
Check and adjust the valves - a simple work with which everything will be done without exception if the instructions will be accurate:
- the pushers take off and fixed at the lowest point;
- the washer for adjusting the gap is removed and its thickness is measured using a micrometer;
- deciding with the desired thickness of the washer, you need to take a suitable element from the kit and install it into the pusher. At the same time, it is important to ensure that the washer has entered the pusher to the side on which its thickness is indicated;
- references are checked the size of the gap.
- For the same scheme, the remaining valves are adjusted, and each time you need to rotate the crankshaft to the half turn, and the adjustment sequence should occur in this order:
- 2nd intake and 5th graduation;
- 6th inlet and 8th graduation;
- 7th inlet and 4th graduation.
There are various knocks. In particular, why the valve is knocking on a cold engine? This question is not as simple as it seems at first glance. Let's try to figure it out.
Sockets engine front-wheel drive cars VAZ
In front-wheel drive cars VAZ engines can have different digital indexes, as motors are installed on different car models. But basically all the power units have the same, and they can differ:
- 8-valve or 16-valve head of the cylinder block;
- Diameter of pistons;
- Carburetor or injection fuel system;
- Minor constructive features (different sensors, collector configurations, etc.).
DVS can occur different stuffs, and it is not necessary to knock the valve. Knocks can happen:
- In a piston group
- In a crank-connecting mechanism;
- In the system of gas distribution;
- In hinged equipment (in the water pump, etc.).
Why the engine is knocking, which may be the cause of the knock:
- insufficient amount of the oil system crankcase;
- wear of parts due to long-term operation;
- factory defects;
- engine overheating;
- motor operation on permanent maximum loads.
The knock has a different character, determine the reason is sometimes difficult to even masters having some experience in repair. But there are characteristic sounds that are defined quite easily:
- a sharp "dry" metal sound, well heard with a sharp press on the gas pedal. So knock rod cervices (liners) of the crankshaft. This is a serious knock, at a minimum, the grinding of the crankshaft is required here;
- the sound of the middle tone, with an increase in the revolutions, it seems that there is something in the engine rolling. Usually so knocking pistons;
- single clicking sound. With an increase in the number of revolutions, it seems to merge, and is similar to the sound of a working sewing machine. So usually the details of the gas distribution mechanism (distribution shaft, pusher).
Knock
How to knock the valve, how to determine it? The knuckles of the valves are usually quite sharp, clicking, high tone. It may not be alone, but at once a few. To understand the reason for the occurrence of various noise in the gas distribution mechanism, you must at least have a little view of its device. GDM VAZ 2114 consists of the following elements:
- camshaft.
- distribution gear.
- Timing belt.
- Pushers.
- Adjusting washers.
- Intake and exhaust valves.
A fundamentally scheme works as follows:
- From the rotating crankshaft through the timing belt, the movement is transmitted to the gear of the camshaft;
- The gear is rigidly fixed on the camshaft (fixed with a key and fastened by a bolt) therefore the shaft is also driven;
- The camshaft camshaft are pressed on the adjusting washer located in the outside of the bottom of the pusher.
- The valve, the valve when moving the crankshaft, opens and closes, the working mixture is filling in the CBOs cylinders, a working cycle is performed.
The cause of the knock may be any link in the gas distribution mechanism. But there are most common causes:
- Big gap between camshaft cam and pusher;
- Wear of the distribution shaft support;
- Wearing a landing place in the head of the cylinder block (GBC) for the camshaft;
- Hardered uneven surface of the adjusting washer;
- Breaking the seat under the pusher in the GBC.
ADJUSTMENT
In any case, if a characteristic valve knock occurs in the engine, it is necessary to check the valve status. In this case, it should be adjusted. To adjust the VAZ 2114 valves, adjusting washers are provided in the factory execution with a thickness of 3 to 4.5 millimeters, the thickness changes every 0.05 mm. Adjust the adjustment as follows (you need a special puller adjusting washers and the washers themselves of various thicknesses):
- Disconnect the gas cable bracket from the valve cover;
- Remove the valve cover (two bolts);
- We dismantle the timing belt cover;
- I exhibit the upper dead point in the first Cylinder of the DVS (there is a label on the distribution gear). How to combine tags, you can see in the repair and operation manual. It is possible to turn the camshaft for the distribution interface bolt clockwise. But it is necessary to do it carefully and without too much effort;
- We check the clearance with a set of automotive probe between the pusher and camshaft camshafts 1 and 3 valve from the timing belt. In the intake valve, the clearance is ~ 0.2 mm, in the graduation it is greater than an average of ~ 0.35 mm;
- Remove the adjusting washer, we look at the marking (three digits indicated thickness). By mathematical calculations, we determine the required thickness to adjust the gap and install a new puck into place. Immediately check the resulting clearance;
- We turn camshaft to a quarter of turnover clockwise and adjust the valve 2 and 5. Even in a quarter - 6 and 8, the valves 4 and 7 are also adjustable through ¼ turn.
- After adjustment, we collect everything in the reverse order, start and listening to the engine.
Other possible knocks in the timing
What if you knock the valve even after a correct adjustment? In this case, it is necessary to check the status of the pushers, the camshaft. To do this, the camshaft is removed and checked:
- The integrity of the camshaft camshafts and the state of its supports;
- Clearance between the pusher and the landing socket in the GBC;
- The condition bed camshaft in the block head.
Many owners of the VAZ cares the knuckles of the valves on the cold engine. But the valve is knocking the same as "cold" and "hot". In the timing of VAZ OVO engines there is no rod, as in some Motor Motors and UAZ, therefore, with heating, the gap on 2114 almost does not change.
Most likely, a knock on the cold occurs not due to the valves, but due to the increased gap between the pistons and the walls of the cylinders in the piston group.
Aluminum pistons as warm up expanding and the gap decreases. Accordingly, the knock disappears.
Periodicity of valve adjustment VAZ 2114
The owners of the car raises the question - how often to adjust the valve on the VAZ 2114 is necessary, if they are not knocking, and should I do the adjustment in this case? According to the factory settings, the valve should be adjusted every 20 thousand km of run during the operation of the car.
Why carry out adjustment works, if not knocking the VAZ 2114 valve? The fact is that with time the landing seat is wearing over time. The valve becomes higher, and the gap decreases. And too small gap threatens power loss and exhaust valve exhaust. Previously, the term clearance in the valves should be checked when the knock and in suspected they are clamped.
