DIY Niva Chevrolet hydraulic lifters repair

In detail: do-it-yourself repair of Niva Chevrolet hydraulic lifters from a real master for the site my.housecope.com.

On cars, a problem very often arises with the fact that the valves begin to knock, or the engine runs intermittently, this may be due to the fact that the hydraulic lifter does not work correctly, therefore, it is necessary to replace the hydraulic lifters for normal operation, the Chevrolet Niva is no exception.

And so let's figure out why the valves are knocking

On classic VAZ engines, a rocker is installed in the gas distribution mechanism, and the gaps in the valves can be adjusted using screws. And on 2123 cars, a hydraulic compensator is installed instead, which in their shape resemble the same adjusting vents, but without gaps, and are adjusted thanks to a plunger pair that work under oil pressure. This hydraulic compensator on Chevrolet Niva cars consists of several parts, and its device is very simple, it consists of:

Frame
Return spring
Upper and lower part of the plow pair

Timing valves can knock for the following reasons:

Insufficient oil pressure in the system
Clogged oil valves due to dirty engine oil
Insufficient oil level in the lubrication system
The seat under the expansion joint is worn out
Parts installed in the system, due to poor quality, require replacement

As a rule, the GC knocks when the car is not yet warmed up, and a minute after the car is started, the knock disappears. This is due to the fact that the oil supply occurs with a certain delay, and you can try to eliminate this problem by replacing the oil filter along with the oil. If the knocking occurs while the engine is warmed up, this is already more serious, therefore, it is necessary to remove the hydraulic lifters and the camshaft and clean all the channels. If after that the knock remains, then it is necessary to change the GCs themselves.

Video (click to play).

But the valve knock appears not only due to the fact that the hydraulics are faulty, but the reason for this may be the following:

Camshaft cams worn out
The valve stem end is worn out
The surface of the rockers is worn out

But it also happens that the hydraulic lifter on a Chevrolet Niva car causes intense wear of the camshaft and rockers. If a valve knock occurs, then driving is not recommended for the following reasons:

Parts of the gas distribution mechanism fail
Due to the rather large clearance, power is lost in the valves, increasing fuel consumption
This knock is unpleasant to the ear.

Already with low mileage this knock may appear, this is because initially from the factory they are installed on the Chevrolet Niva, low-quality expansion joints, the reason may also be insufficient rotation of the main engine at the factory, but if the hydraulics are still inoperative, then they can be replaced, for example, with those, which are produced by the German company INA, they are one of the most reliable, you can also purchase derivatives for this car at AvtoVAZ, they come in two samples of the old and new and differ in cylinder heads.

Basically, they are sold by the piece, but their price is not cheap, and ranges from three hundred to four hundred rubles, but the adjusting bolt will cost half the price. If the adjustment occurs every ten thousand kilometers, then it will be more convenient to put an adjusting bolt, since there will be fewer problems and it turns out cheaper.

If there is a knock, do not rush to remove the valve cover, first change the engine oil in the engine
Fill in the same brand of oil, this will reduce the chance that the HA will become clogged.
They should not be tightened too much, as the constriction will lead to a quick failure.
Before installing new ones, it is advisable to rinse the old ones in gasoline in order to clear it of toxins, then check it by pressing the plunger with your finger and if it returns to its original place, it is serviceable

Replacement of hydraulic lifters Chevrolet Niva. If the driver agrees to adjust the valves every 10 thousand km, then the New hydraulic lifters on the Chevrolet Niva are not cheap, and there is no guarantee that they will not knock again.

How to change hydraulic lifters on a Chevrolet Niva video. If the driver agrees to adjust the valves every 10 thousand km, then it is better to install the bolts - there are fewer problems, and the repair is cheaper.

Perhaps the main thing is that the installation of hydraulic lifters on the Niva requires incredibly fine adjustment and great care, which means that it will take much more time.

Repair DIY repair. Here I will clarify - it is imperative to check the marks when the leading branch of the chain is stretched, the one that is pressed by the damper, well, and not to confuse the timing mark on the sprocket with other holes, of which there are also enough. Posted on 24 January - And one more very important nuance - all hydraulic supports that you install and those that are already on the car must be tightened with the same torque. Such hydraulic lifters "Niva Chevrolet" were distinguished by easier installation compared to their predecessor. Despite the extensive list of positive aspects, there were some drawbacks that arise during the assembly line.

The principle of operation of hydraulic lifters, as well as their diagnostics are described in the article Why hydraulic lifters knock on hot and cold. In this article, we will talk about how to change hydraulic lifters on a Chevrolet Niva. Such a replacement is necessary if the problem is not in the oil system or the oil that does not match the engine, but in the malfunction of these parts.

If you are going to change your HA outdoors, find a clean, dry, level area and work on a calm, sunny day.

Wait for the engine to cool completely. If you open the hood, this process will go faster. Engage neutral and disconnect the battery. Now you can start replacing the hydraulic lifters. For your convenience, we have created a step-by-step guide to help you with this. What you need to replace hydraulic lifters To work you need the following tools and materials: flat and Phillips screwdrivers; ratchet wrench with extension and a set of nozzles; socket wrench tube for 10 and 12; soft wire, wire or plastic clamps; torque wrench; valve cover gasket; clean rag.

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The Russian SUV Niva Chevrolet was originally equipped with two types of engines - this VAZ-2123 with volume 1,7 liters, and Z18XE from the German company Opel with a volume 1,8 liters. If the latter is installed on your car, then, as a rule, it does not cause any hassle and malfunctions, but with the Russian analogue it is much more difficult, since the valves periodically begin to knock, forcing the engine to work intermittently, requiring replacement of hydraulic lifters.

When removing the bolt, keep the sprocket and chain still.

The order in which the bolts are removed does not matter.

Only after these works can one proceed to dismantle the hydraulic lifters.

After dismantling, put the parts aside.

Install the previously fixed chain.

On this, the work on replacing the hydraulic lifters can be considered completed.

Hydraulic lifters on "Shniva" close.

If you hear a knock of valves, do not rush to start replacing hydraulic lifters, try changing the engine oil first.

Pour in high quality oil, with a viscosity 10W40 - in summer, and in winter 5w30 or 0w30. Please note that if the oil is constantly filled in the same and changes on time, that is, every 7-10 thousand kilometers, then the clogging of the hydraulic lifters is significantly reduced.
If you dismantled the hydraulic lifters, try flushing them in gasoline, having previously disassembled them. After cleaning, check them for operability by pressing on the plunger with your finger, and if it is serviceable, it will return to its original position.

As you know, on standard or, more simply, "classic" VAZ engines, a rocker was mounted in the gas distribution mechanism, and the valve clearances were adjusted with special screws.

However, on the 2123 engine for the Chevrolet Niva, hydraulic compensators are provided, made in the form of exactly the same adjustment bolts, and the clearances are adjusted due to the operation of the plunger pair and the required oil pressure in the engine.

Despite all the apparent complexity of the design, it is arranged in the engine very simply and consists of only four parts:

Hydraulic lifter housings.
Recoil spring.
A plunger pair, or rather, of two parts, upper and lower, that is, a plunger and a check valve with a piston.

Among the various reasons why the valves on the Chevrolet Niva begin to knock, it is necessary to highlight the main ones:

Insufficient oil pressure in the system.
The oil channels in the engine are dirty, and from this there is an intensive contamination of the entire lubrication system.
The lubrication level in the system is insufficient.
The seat for the hydraulic lifter is worn out.
Parts and components of hydraulic lifters are worn out.

It happens that the hydraulic lifters begin to knock right after starting in cold weather, and literally immediately after 30-60 seconds it goes away. This is explained by the fact that the oil arrives at the hydraulic lifters with a delay, and does not have time to provide them with the required amount of lubricant.

This problem can be solved after changing the oil and oil filter. And when the valves knock when the engine is "hot", the usual oil change is no longer enough, you will have to remove the "head", the camshaft and clean the channels. If this procedure does not bring any results, you will have to change the hydraulic expansion joints.

Please note that valve knock that occurs due to the fault of hydraulic lifters can have consequences, expressed in the following:

The presence of wear on the camshaft cams.
Rocker surfaces will have severe wear
Valve stem worn.

It is highly discouraged to drive with such a “knock” for a long time, because this directly affects the wear of the timing mechanism parts, fuel consumption will increase and power will decrease.

Hydraulic lifters installed from the factory are not always of high quality, because they can knock almost immediately, as the car left the assembly line, having very little mileage. As practice shows, the cause of such a malfunction is the insufficient force with which the bolt is tightened at the factory, and this is - 2-2.2 kgf ... However, if these parts are already inoperative, then you have to choose what to replace them, since there are options.

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Now let's start replacing hydraulic lifters:

Carefully remove the cylinder head cover by screwing the valve cover fasteners. General photo of the mechanism
Then we check the performance of the hydrosupport. We press alternately on the levers of the valve drive so that the plungers of the supports go down to the limit. If it is hard enough to carry out this action and the support does not lend itself well to your onslaught, then the hydraulic lifters are in order. Otherwise, the levers easily move forward and backward.
We turn slowly the crankshaft head, while it is required to align the mark on the camshaft sprocket with the mark (tide) on the base of the camshaft bearing housing.
Using a regular Phillips screwdriver, press down the chain tensioner plunger until it stops.
We unscrew the bolt securing the camshaft sprocket, the movement is made counterclockwise. Remove the camshaft sprocket bolt
Without releasing the tensioner plunger, unscrew the sprocket from the camshaft without disconnecting it from the base of the chain. In this case, the chain must be tightly attached to the drive of the oil pump. Correctly secured chain at the base of the oil pump
We fix the sprocket together with the chain at the engine mount. Fastening a sprocket with a chain

After all the parts have been installed, we clean the valve cover from dirt, dust and oil drips.... With a small brush, remove the remnants of the sealant and the old gasket from both surfaces of the bases, this can also be done with the back of a penknife. Apply sealant to the perimeter of the bearing cover and install the purchased gasket, while making sure that it does not crawl out over the edges of the upholstery. Apply the exact same layer to the opposite surface and fix it with light pressure. If you still have questions about the repair, you can watch a video on replacing hydraulic lifters in two parts.

In the life of every motorist there comes a moment when it is necessary to make a serious and decisive choice. The classic Shakespearean dilemma is “to buy or not to buy, that is the question”. Which car will be most suitable. Many opted for domestic models and did not regret it.

Each machine has its own strengths and weaknesses. If your choice fell on a new model Niva with the name "Chevrolet" in addition to "mechanics", then this is what you need. It occupies a leading position among those few who are ready to challenge the Russian off-road, and it has undergone a serious restyling in comparison with previous versions. Purchasing spare parts for Niva will not be a difficult task, and with proper maintenance and care, the car will serve you for many years. But it will break down over time, like any other.

Perhaps you caught yourself on the fact that you already understand your car well, as they say, from a half-word. There something creaks and makes noise, here it groans and thunders. Any extraneous noise causes an adrenaline rush, and immediately there is an irresistible obsessive desire to grease, spray, change and put on. And this is good. This is roughly what the harmony of man with a machine looks like.

But imagine such a conditional situation when the engine is already started and starts to warm up a little. When suddenly your sensitive ear picks up some suspicious knocking just in the area of the engine head. You get behind the wheel and drive off. The knocking seems to disappear for a while, at least nothing is heard due to the roar of the engine. As soon as the car stops and idles, the knock appears again.

The diagnosis is simple - it is the hydraulic lifters (valves) knocking.

The first thoughts that come to your mind may not be the most appropriate in this situation. For example, do you need to run to the store for new parts or urgently drive the car to the car market to sell it before it collapses. We will act "one step at a time."

If you hear the clatter of valves even with a well-warmed engine, then there is something to worry about, but early to panic. Usually only one valve fails, not all at once. It is impossible to determine which one "died" without skills and special tools. Therefore, you will have to buy and replace the entire kit. But more on that later.

Replacing hydraulic lifters for beginners is a very difficult process. You can call such a process the import word restyling, because we will change the state of our machine, and it will feel completely new. If you doubt what will happen, drive the car to the service station, and the trick is in the bag. But more economical and persistent motorists may want to try their hand, and you can acquire the skill, and get to know the hardware better. Now is the time to run for a new set of valves. Yes, and you will have to buy a new gasket. Have you bought it? We are starting the replacement.

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We act strictly in the order described below:

We remove the cover of the hydraulic lifters and put it aside.
We fix the chain on the camshaft sprocket with a wire and carefully remove it.
Unscrew the crankshaft bed mount and remove it.
We dismantle the rockers and lay them out in the order they stood.
We remove and radically throw the hydraulic lifters into the bucket.
We clean thoroughly and lubricate the places where we will install new units with engine oil.
We screw in the hydraulic adjusters with effort very tightly.
Putting everything that was removed earlier in the reverse order.
You will need a wide-blade screwdriver to place the new parts back in place.
We will not put the lid back in place yet.

Now we begin the process of thoroughly cleaning the valve cover from oil and dirt adhering from the inside, which has literally eaten into the metal. The process is not very fast and not pleasant, but extremely important. Therefore, we are not in a hurry, because when will we be able to get to her next time?

In the same way, we clean the seat for the gasket, cutting off and cleaning off the remnants of the sealant, as well as pieces of the worn out gasket. By the way, the old gasket should have been in the bin for a long time. And no assumptions on the topic that suddenly it will come in handy. What tools do you need for this? A regular screwdriver, the back of a knife, or even a spatula can come in handy.

After that, a thin layer of sealant is applied to the clean, degreased surface of the lid at the point of contact with the metal. This should be done carefully and evenly distribute the sealing material squeezed out of the tube. Now put the spacer in place. All these actions need to be done with pinpoint accuracy, making sure that nothing is skewed and the gasket does not protrude outward.

Now it remains to tighten the retainer correctly. In no case should you first twist one side, and then the other, since the gasket will still skew and squeeze to the side. Screw diagonally, tightening gradually to the end.

Most often, hydraulic lifters do not fail completely, but become heavily contaminated, as a result of which they are simply not able to perform the task assigned to them correctly. Or only one breaks, as noted above. If you have the time and desire, you can try to get the hydraulic lifters back from the bucket, which we had previously thrown there, and carry out restoration work.

To do this, you need to disassemble the units and rinse everything thoroughly. After that, reassemble everything in the reverse order. Sometimes there are situations when additional replacement of the adjusting bolts leads to good results, which also fail over time. What to do is up to you. The main thing is that the machine starts up again and pleases you with the uniform hum of a steadily working engine.

There is a special offer on our website.You can get a free consultation of our corporate lawyer by simply asking your question in the form below.

Often, when it is required to replace hydraulic lifters on a Chevrolet Niva, the car's engine runs intermittently. In many cars, they knock on a cold engine; when it warms up to operating temperature, the sound disappears. The reason is simple, the oil pump delivers oil to them with a delay, the "treatment" is also quite simple: by changing the oil and the oil filter. But if they continue to knock on a hot engine, then an appropriate repair or replacement is needed.

Replacing hydraulic lifters in a Chevrolet Niva is carried out when the sound cannot be eliminated by other means. To do this, you can try to flush them or remove the camshaft and clean the channels. If this does not help, then you need to put on new "gidrics". The process of performing work can be divided into 2 stages: preparation of parts and tools and the repair itself.

First of all, removing the valve cover, you will damage the gasket under it, so you need to purchase a new one. It costs from 100 to 500 rubles, depending on the manufacturer and quality. Additionally, you will need a sealant, if it is not in your garage, it is advisable to take care of this in advance, since a gasket is installed on it. Naturally, new hydraulic lifters are bought. From the tools you need to prepare the following:

A set of car keys;
Ratchet wrench;
Screwdriver (Phillips and flat);
10 cm soft wire or nylon tie;
Large syringe for pumping oil;
1 - 2 liters of gasoline;
Rags;
Metal brush.

The machine is placed on a flat surface, the neutral speed is switched on;
With the help of a screwdriver, the rubber corrugation of the air duct (tortoise) is removed;
The branch pipes that block access to the valve cover are disconnected;
With a 10 key, 8 bolts of its fastening are unscrewed;
The serviceability of the hydrosupport is checked. All levers must be pressed in turn, while the plunger must go down completely. If pressing is given with difficulty, and the support practically does not move, the "hydrics" are working. In the opposite situation, when the levers move freely, we continue to disassemble the car;
The crankshaft head is carefully rotated until the mark on the camshaft sprocket is aligned with the mark on the gears;
A Phillips screwdriver presses the tensioner plunger;
The bolt securing the working gear is unscrewed;
The plunger at this time can be fixed in one position by screwing the cap nut onto it;
In this case, the camshaft sprocket is unscrewed, but not disconnected from the base. Below, in the pallet, the chain must also be firmly fixed and tensioned;

After the engine is assembled, it is advisable to clean the valve cover from carbon deposits, dust and old oil. The same is done with the surface on which the new gasket is placed. It is imperative to remove the remnants of old rubber or cork, sealant. This is done with a clerical knife or spatula. The installation of a new gasket is carried out on the sealant layer. When installing the cover, it is necessary to control the tightening torque of the nuts and not allow them to skew.

Older hydraulic lifters should not be overtightened. From this they quickly deteriorate, but it is also not recommended to leave them weakened. The tightening force should not exceed 2 kg / s.

Having disassembled the upper part of the car engine and removing the old "hydrics", before changing to new ones, you can try to disassemble and wash them. If you need to make an effort to press the lever, then replacing the hydraulic lifters on the Chevrolet Niva is no longer required, flushing helped. If the procedure does not bring results, we change to new ones.

And so let's figure out why the valves are knocking

Frame
Return spring
Upper and lower part of the plow pair

Timing valves can knock for the following reasons:

Insufficient oil pressure in the system
Clogged oil valves due to dirty engine oil
Insufficient oil level in the lubrication system
The seat under the expansion joint is worn out
Parts installed in the system, due to poor quality, require replacement

But the valve knock appears not only due to the fact that the hydraulics are faulty, but the reason for this may be the following:

Camshaft cams worn out
The valve stem end is worn out
The surface of the rockers is worn out

Parts of the gas distribution mechanism fail
Due to the rather large clearance, power is lost in the valves, increasing fuel consumption
This knock is unpleasant to the ear.

If there is a knock, do not rush to remove the valve cover, first change the engine oil in the engine
Fill in the same brand of oil, this will reduce the chance that the HA will become clogged.
They should not be tightened too much, as the constriction will lead to a quick failure.
Before installing new ones, it is advisable to rinse the old ones in gasoline in order to clear it of toxins, then check it by pressing the plunger with your finger and if it returns to its original place, it is serviceable

Video (click to play).

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