Replacing the head gasket on a VAZ-2114 is quite difficult, since it is necessary to know the design features of this engine, as well as to have experience in carrying out such operations on similar engines.
The choice of the gasket should be approached seriously and carefully, since the normal operation of many nodes depends on its condition. If the process described in the article seemed difficult enough and the motorist is not able to carry out the operation on his own, it is recommended to contact a car service, where they will help and do everything quickly and efficiently.
The cylinder head gasket (cylinder head) is undoubtedly an important part of any car - the VAZ 2114 is no exception - because it is thanks to it that 3 systems remain sealed at once: gas distribution, cooling and lubrication (oil). Hence, it is quite natural that this element is a disposable part, so in case of some kind of malfunction, do not even try to fix it, but immediately replace it.
Bubbles are a sign of leaks, and since the cylinder head gasket must ensure this tightness, most likely, it is in it.
Exhaust gases escape through the cylinder head gasket.
The situation is rare, but possible, especially for those motorists who like to tighten the fastening nuts.
This sign indicates that antifreeze has entered the engine cylinders. Perhaps this hit occurs just through the gasket of their heads. I advise you to read the article: White smoke from the exhaust pipe.
When checking the oil level, a white emulsion like foam is found on the dipstick.
This can happen again due to leaks in the cooling system, which can be the result of a damaged cylinder head gasket or (less often) the presence of a crack in the block itself.
Reduced engine power and increased fuel consumption.
They can be a sign of a variety of breakdowns, including breakdown of the gasket between the cylinders.
The coolant (coolant) is oily.
Like all of the above signs, it does not require an unquestioning replacement of the cylinder head gasket, but calls for a thorough diagnosis.
1. De-energize the car by removing the negative terminal from the battery.
2. Fix the piston of the 1st cylinder in the TDC position.
4. Make sure the supply pressure is low enough. To do this, look at the rear end of the fuel rail for an element that looks like a wheel tire spool with a cap. Unscrew this cap, press on the spool and drain the fuel into a container prepared in advance. Screw the cap back on.
Attention! Be extremely careful and attentive with this item. The first couple of hours after stopping the car, do not even touch the spool, you will burn yourself - the fuel will fly out in the form of a sprayed torch and is quite hot!
5. Disconnect the muffler pipe from the exhaust manifold. To do this, unscrew the nuts securing the bracket with the pipe under the bottom of the car. After removing the bracket, removing the corresponding nuts, remove the clamp and release the front pipe.
6. Remove the cylinder head cover by simultaneously disconnecting the intake and exhaust manifolds, the throttle assembly and the receiver.
7. Loosen the clamp of the air inlet to the throttle pipe and disconnect the plug from the mass air flow sensor, remove the pipe from the throttle assembly with an air intake hose and an air filter.
8. Using a screwdriver and a “10” hex socket, disconnect the hoses coming from the air outlet, loosen all clamps and unscrew all fastening screws together with washers.
9. Disconnect the harness pads from the sensors: throttle position, oil level and pressure, coolant temperature, knock and crankshaft position - as well as the idle speed control and injector harness.
10. Remove the lugs of the explosive wires from the spark plugs.
11. Pull the harness out from under the receiver.
12. After unscrewing the fastening nuts, remove the timing cover, and then the belt itself.
13. Having fixed the camshaft toothed pulley from scrolling, unscrew its fastening bolt together with the washer.
14. Carefully, without touching the oil seal, remove the pulley from the camshaft.
15. Having removed the mounting bolts, dismantle the rear cover of the camshaft drive.
17. Using the hexagon, loosen the cylinder head bolts in sequence - half a turn. And then, in the same sequence, unscrew them to the end. Such slowness and order will exclude the possibility of deformation of the cover.
18. Remove the cylinder head and using a screwdriver, using this tool as a lever, disconnect the cylinder head from the gasket.
nineteen.Clean all surfaces and elements released during the repair, remove oil from the threaded holes.
20. Place a new gasket on the dowel sleeves (the hole for the oil passage in it should take place between the 3rd and 4th cylinders).
21. Make sure that the camshaft and crankshaft are still in the TDC position. To do this, inspect 1 cylinder. Both valves must be closed.
22. Fasten the cylinder head together with the gasket with the retaining bolts, pre-lubricated with a small amount of engine oil. Tighten the bolts in 4 stages as follows:
Stage 1 - with a force of 20 N • m (2 kgf • m);
Stage 2 - with a force of 69.4–85.7 N • m (7.1–8.7 kgf • m);
Stage 3 - rotate 90 degrees;
Stage 4 - finally put the squeeze, turning another 90 degrees.
23. Reassemble all removed items in reverse order.
As you can see, replacing the VAZ 2114 cylinder head gasket is a rather laborious and complicated process, so if after reading this article you still have even the slightest doubts and / or questions, it is better to entrust this work to professionals.
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The power plant of a car is a rather complex device, consisting of many mechanisms and systems that interact with each other. The basis of any engine is the cylinder block and its upper part is the block head.
Structurally, it did not work out to connect these two parts without placing gaskets between them for tightness between the specified elements of the power plant, as well as to ensure the connection of the channels of the lubrication and cooling systems so that the working fluids do not mix and do not penetrate the cylinders. At the same time, the gasket must perform its functions in very difficult conditions - high pressure, significant temperature, exposure to oil and coolant.
Any cylinder head gasket (cylinder head) consists of many layers, including sheet steel, cardboard, fiber, cork. All of these layers are well compressed and covered with a layer of sealant.
Regardless of the gasket material, there is always the possibility of breakdown. And if you do not pay attention to such a malfunction in a timely manner, then it can lead to significant damage to the power plant and overhaul with the replacement of the cylinder-piston group or cylinder block.
Signs of breakdown of the cylinder head gasket
The main signs of a gasket breakdown are:
If such signs appear, the only option for eliminating this malfunction is only to replace the cylinder head gasket of the VAZ 2114.
It is noteworthy that this gasket is disposable, and is replaced every time, therefore, any modification of the engine associated with the removal of the head must be accompanied by a replacement.
Engine repairs associated with replacing the gasket, although laborious, can be done independently, having the necessary equipment at hand.
Everything that is needed to perform the operation is indicated below:
sets of open-end and socket wrenches (you will especially need keys for "10", "13", "17" and "19");
a set of heads of the same dimensions, as well as a special head "Torh";
torque wrench;
screwdrivers;
pliers;
tanks for draining technical liquids;
rags;
sealant;
Installing the cylinder head
You also need a new cylinder head gasket and valve cover gasket. With all this, you can begin repairs. The sequence of actions for repair is as follows:
Before assembly, check the head bolts for the hood, their length should not be more than 13.5 cm, if they are longer, they can no longer be used.
You should also check the plane of the head. If it was overheated, it is possible that it was warped and repairs would be required in the form of facing the plane.
During assembly, the head mounting bolts are tightened in a specific sequence and with a strictly defined tightening torque. Then everything is assembled in the reverse order of disassembly.
Disassembly is carried out in the same sequence if the power plant is being modified.
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The design of any internal combustion engine, including VAZ 2109 8-valve engines, provides for the following components:
The combustion chamber;
Valve mechanism;
Cast lines;
Exhaust manifolds;
Intake manifolds.
If you perform boring and correct the current state of the manifold and cylinder head channels, you can increase the cylinder filling ratio, which leads to an increase in engine output and power. It is not uncommon for the revision to be performed as the final stage to increase the volume of the internal combustion engine.
Modification of the cylinder head is carried out to achieve the following goals:
Increase the diameter slightly;
Remove defective casting areas;
Correct fillet radii;
Polish the channels.
The geometry of the collectors, together with the cylinder head lines, changes during the revision process. If the work is done incorrectly, you can not only fail to achieve the desired increase in power, but also lose the efficiency of the motor, lead to its rapid wear and tear.
To complete the boring procedure for the cylinder head channels, you will need:
Ball cutter corresponding to the required bore diameter (29, 31, 32 mm);
Sandpaper;
Cones;
Drill;
Calipers;
Smaller hose than bore.
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To modify the collectors, it is necessary to complete two main stages of work.
Obtain the required channel diameter by milling the collectors
Polish the tract with special tools and devices. To do this, you need to attach medium-grain sandpaper to the hose, and attach the hose to the drill. Due to the rotation of the nozzle inside the bore, the desired effect is achieved
When performing this operation, the most important thing is to maintain the standard location of the axis of the channels and the shape of the section of the flow path.
When modifying collectors, there are a few important rules to follow.
Before starting to bore the cylinder head manifold, be sure to accurately determine the location of the manifolds in relation to the cylinder head. To do this, you need to install a pair of pins.
The diameter of the opening of the inlet pipeline can be made less by 1-1.5 millimeters than the diameter of the counter windows in the head. Largely because of this, many owners of the VAZ 2109 refuse to bore the collectors.
The exhaust manifold openings in diameter can be equal to or larger than the diameter of the cylinder head mating paths by 1-1.5 millimeters.
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Before you start creating the new geometry for the inlet and outlet ports, remember that the boring results must be consistent with the manifolds you have already machined.
To comply with this condition, it is necessary to dock the pipeline with the cylinder head and set the required geometry by boring on the traces obtained. To obtain a clear mark, use solid oil or plasticine, which is used to process the end of the cylinder head.
The boring of the cylinder head channels should be aimed at obtaining the following diameters.
Channel diameter
The path in the block head is processed in accordance with the following sequence:
It is bored with a milling cutter from the manifold side to the valve sleeve;
Boring is carried out from the side of the combustion chamber. Make sure new valve seats are in place;
Boring geometry using cones of various configurations;
Channel grinding.
Before starting to work on processing the inlet and outlet channels of the cylinder head, pay attention to several important recommendations of specialists:
Additionally, it is not necessary to process, refine the inner surfaces of the inlet channels with sandpaper. Defects on the surface obtained as a result of milling will contribute to the accumulation of drops of gasoline and its evaporation;
When machining the intake port of the fourth cylinder, you will definitely open the channel of the oil system. It will be necessary to install a sleeve turned in accordance with the dimensions;
When modifying the channels, pay close attention to the observance of the diameters.Having made the holes larger than the prescribed size, you run the risk of opening the cooling jacket, which runs next to it. If you do this, your cylinder head will be unusable.
It is imperative to install the bushing in the quarter inlet. Otherwise, you will leave one-on-one thin aluminum wall with oil pressure when the engine is running. A breakthrough of such a wall will be inevitable.
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At the final stage of the cylinder head revision, you will need to install a new gasket on the end face of the block head and modify it in accordance with the boring.
Be sure to rework the chamfers and valve seats.
Modification of the block head is a rather complicated, time-consuming process that will require increased concentration and caution in your actions. In this regard, we recommend that you contact professionals, or do such work with your own hands, having received the necessary knowledge in advance.
Periodically, the cylinder head gasket may fail due to wear of its material or its burnout. The main signs that it is time to replace the gasket with a new one are the appearance of local leaks of oil and coolant at the point of contact between the cylinder head and the motor.
It should be remembered that when replacing the gasket, it is important not only the tightening torque of the cylinder head of the VAZ 2114, but also the entire sequence of operations - after all, the replacement itself is a very important and serious procedure, errors during which can lead to engine malfunction.
In order to do it correctly, you will need:
set of socket heads;
extension;
ratchet / crank;
torque wrench.
The replacement process itself should be carried out according to the following scheme:
Disconnect the wires suitable for the emergency oil level and coolant temperature sensors.
Drain off coolant.
Dismantle the thermostat.
Remove the air filter housing.
Disconnect the inlet exhaust pipe from the manifold.
Remove the casing as well as the camshaft belt itself.
Disconnect both damper rods from the carburetor.
Disconnect the wires suitable for the cylinder head.
Disconnect hoses suitable for cylinder head by loosening their clamps.
Remove the cylinder head.
Remove worn gasket.
Clean the contact surface of the cylinder head from the remnants of the gasket material.
The installation of the gasket and the installation of the cylinder head in its place is carried out in exactly the same sequence, but in the reverse order. At the same time, it is worth paying close attention to such a factor as the tightening torque of the cylinder head of the VAZ 2114 8 valves - we will talk about it below.
Before proceeding with the installation of the block head, you should first pay attention to the condition of its bolts. They must have good threads and be in accordance with the required standards in length.
The normal overall length of the cylinder head bolt is 135.5 mm. If the bolts removed during the replacement of the gasket meet this parameter, then they can be reused. If the bolts have lengthened during engine operation, then they can no longer be used and new ones should be purchased.
Having dealt with the bolts in this way, and having installed them in place, you should proceed to tightening. It is performed without fail only with a torque wrench. Tightening the bolts "by eye" can lead to very serious consequences, up to and including damage to the engine itself.
And so, how to stretch the head on the VAZ 2114 correctly? First, remember to start tightening the bolts from the center outward.
This diagram looks like this:
Secondly, tightening should be performed in four stages (each of which is performed in exactly the same sequence as indicated in the diagram above).
At the first stage, we tighten each of the bolts with a torque wrench with a force equal to 2 kgf / cm2.
At the second stage, we tighten all the bolts with a force of 8 kgf / cm2.
At the third stage, we tighten the bolts, turning each of them at an angle of 90 degrees.
At the fourth stage, we again turn each of the bolts (still adhering to the diagram at the beginning) through an angle of 90 degrees.
After all four stages are completed, the tightening of the cylinder head bolts can be considered complete.
Tightening the cylinder head bolts should be taken as seriously as possible. It is necessary to perform all its stages strictly in the same order and with equal effort on each of them. Failure to observe this rule can lead to rapid wear of the gasket and the appearance of oil and coolant leaks.
A tool such as a torque wrench, which allows bolts to be tightened with equal torque, requires great care and skill.
The approximate sequence for tightening the bolts with such a wrench is as follows:
set the holder to the "zero" position;
start a smooth rotation of the instrument, while monitoring its readings;
if the rotation of the tool (especially at the initial stage of tightening) occurs without changing the torque on the indicator, then this may indicate a slight internal tension of the fasteners. This is completely normal and the rotation of the instrument should be continued;
when reaching the tightening torque corresponding to the required, the movement of the tool should be stopped.
Instead of a torque wrench, you should not use any other tool (including a mechanized one with the ability to normalize the tightening force). After all, only a key can achieve absolutely precise and smooth tightening of the bolts, due to which the gasket will be evenly pressed over the entire surface of the block. This will help to maximize its service life, to avoid burnouts, oil leaks and coolant leakage.
Video (click to play).
You can find additional useful information from the video below:
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Disconnect the negative terminals from the storage battery.
tool. Further, this tool must be used as a lever in order to slightly raise the head, and then completely remove it.
