Replacement of an epiploon коленвала VAZ-2109: the instruction, ways. VAZ-2109: replacing crankshaft oil seal with own hands

On the crankshaft of the engine on both sides are installed special seals - seals. They are designed to contain oil inside the engine, do not allow it to flow out during operation. Like any other mechanism, they eventually wear out and must be replaced.

Symptoms of crankshaft oil seal wear

Cracks appear on the worn element, it becomes rigid. The part begins to pass through the engine oil, splashing it under the hood.

First you need to determine which of the oil seals is out of order:

• If the front seal of the crankshaft is worn out, the grease marks will be visible on the front of the pallet right under the stuffing box and on the oil pump cover;
• If the rear is worn out, the oil will be on the gearbox.

Causes of wear of the element

It occurs for the following reasons:

• Natural wear during long-term operation;
• Incorrect installation of this stuffing box;
• Overpressure in the crankcase;
• Backlash of the crankshaft itself.

Earlier, the incorrectly installed sealant will not last long and will soon fail. As a result, the crankcase ventilation system becomes clogged or the breather hose is broken. This leads to the appearance of excessive oil pressure in the crankcase of the engine, which squeezes and twists the oil seal with its force. Because of this, it wears out more quickly and skips lubrication. The same symptoms occur when the backlash of the crankshaft is too high, which squeezes out the element. This is caused by the wear and tear of the semimers of the main bearings. They in their normal operation exclude the crankshaft play. When the semirings wear out, the shaft starts to walk from side to side, from which the semicircle falls into the crankcase. The crankshaft itself begins to grind the main bearings and the connecting rod caps.

In case of late replacement of semirings, the element may not be installed on its seat. This will threaten the driver with the replacement of the entire cylinder block. It is worth bearing in mind all these reasons, always check the correct operation of the engine and, if a problem is detected, it must be fixed. Otherwise, the new omentum will last very little time, and it will have to be changed again. In order not to lead the motor to oil starvation, it is necessary to replace the crankshaft oil seal in time (on the VAZ 2109 car including). Below we will consider how to do this.

Replacing the front crankshaft oil seal with your own hands: methods

The operation should be performed with an assistant. Such a job, like replacing the crankshaft oil seal on a VAZ 2109 car, is a fairly long process and depends on which gland is changing: front or rear. If the first, then this is not such a complicated operation, which can not be said about the rear element. To get to it, you need to remove the gearbox, clutch, unscrew the flywheel of the engine and then begin to dismantle and install.

Replacement of an epiploon crankshaft VAZ 2109 (2 ways):

• On site, without removing the oil pump assembly;
• With removal of the pump assembly.

The first way is done much faster. But sometimes you have to work in a tight space. Although drivers and auto mechanics use this method most often. It is possible to work both from the side of the hood, and in the inspection ditch.

Replacing the epiploon of the crankshaft VAZ 2109: step-by-step instruction

First, the car is installed on the handbrake. The nut of fixing the generator to the tension bar loosens, and the generator drive belt is removed. Next, you need to call an assistant to turn on the fifth gear and keep the brake pedal depressed to prevent cranking. This will prevent the accessory drive pulley bolt from loosening. For convenience, it is possible to remove the front right wheel and unscrew the pulley fastening bolt with a long collar.

What next? Having removed an element, it is necessary to reach to a gear pulley of газораспределительного the mechanism. To do this, the plastic protective cover is disassembled, one wheel is hung out from the car, the third or fifth gear turns on. By rotating the wheel clockwise, two marks are placed: on the pulley of the camshaft and the crankshaft.

Then you can remove the timing belt. Using a flathead screwdriver, the toothed pulley of the crankshaft is pinned and removed , and then the key on its flange. Now with the screwdriver you can pick out the old stuffing box. It we poddevaem for the most extreme contour. This should be done with care, so as not to leave scratches on the flange of the crankshaft.

These deformations will wear out new oil seals faster even when properly installed. Some people use a clever way of removal: screw the screw into it, squeeze the pliers and pull it out together with the sealant. Before installation, the working (internal) surface of the stuffing box is lubricated with engine oil. Next, install on the seat. The new oil seal should be pressed using a turned mandrel or bar, gently tapping it with a hammer.

It is important not to damage the body of the element. The new seal should be pressed to the stop and clearly stand on its seat without distortion.

The second method

Replacing the epiploon crankshaft VAZ 2109 in the second way implies the removal of the oil pump entirely. Changing the seal is very convenient in this case, but you will have to spend more time. After completing all of the above, unscrew the 3 bolts of the engine sump, directly under the pump cover. The cover fastening elements are then unscrewed. The oil pump is carefully removed. After removing the old one and pressing the new oil seal, its working surface is lubricated with oil, and everything is installed in the reverse order to removal. The challenge is to install the oil pump in place.

It needs to be properly centered so that the element correctly performs its work and is not squeezed out. As can be seen, on the VAZ 2109 car, replacing the crankshaft oil seal, made by yourself, is quite understandable and not very difficult work. If it was possible to detect the axial free running of the shaft above the norm, this indicates the wear of its semirings. They should be replaced immediately, so that no complications arise.

Change semirings

To do this, do not remove the crankshaft VAZ 2109. Replacing the stuffing box, semirings, liners (sensor crankshaft, note immediately, you must also shoot) begins with the search for the location of the elements. These parts are on the sides of the central (third) main bearing. On the side of the middle crankshaft support, a cermet semicircle of yellow color is installed. On the other hand - steel-aluminum. Elements should be tight, and depending on the wear of their nests, they come in three sizes:

• Standard;
• The first repair;
• Second repair.

What next?

Preliminarily draining the oil from the engine of the car, unscrew and remove the pallet. Then unscrew the two bolts securing the cover of the middle main bearing. It is removed and the gap between the bearing and the half ring is measured with the help of probes. Add to it a standard parameter of 2.31 mm.

As a result, the required size of the new semiring is obtained. After this, by pushing out the old half-ring, they are installed in their nests. It is important that the new element is freely entered. After the work done, all the removed parts are installed back.

The result

So, we found out how the crankshaft oil seal is being replaced (VAZ 2109 including). The driver is required to monitor the condition of the sealing elements, check the free axial running of the crankshaft, so that in the future the operation was without any negative consequences.