How to replace the front and rear crankshaft oil seals on a VAZ 2109

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Crankshaft oil seals or seals work in rotating mechanisms and act as protective dampers. Their main task is to protect the working device from oil leakage. Thus, the oil seal is a sealing element.

Brand new cuffs

Causes of failure

Traces of oil drips are the main and main sign that indicates wear of the crankshaft oil seal. The presence of traces of oil indicates that the tightness of the engine lubrication system has been compromised.

Oil seals can be destroyed under the influence of several factors:

• Natural wear and tear, aging of the rubber used for the manufacture of crankshaft oil seals;
• Incorrect installation, which led to premature wear and loss of functionality. This usually happens during repairs at dubious service stations or when an inexperienced car owner does the replacement with his own hands;
• Mechanical damage to the element;
• Use of a defective, counterfeit oil seal.

The blame should not always be placed solely on the cuffs, which come in front and back. Before you suspect seals, make sure that other potential causes are not to blame.

Checking node status

By checking all elements of the lubrication system, you can make sure that the cause really lies in worn out, deformed oil seals. And then they can be replaced with new elements.

If problems are detected with the crankshaft seals, the only correct solution is to replace them.

Second method

Replacing the VAZ 2109 crankshaft oil seal with the second method involves removing the entire oil pump. Changing the seal in this case is very convenient, but you will have to spend more time. Having completed all of the above, unscrew the 3 bolts of the engine sump, directly under the pump cover. Then the cover fastening elements are unscrewed. The oil pump is carefully removed. Having removed the old one and pressed in the new oil seal, lubricate its working surface with oil, and everything is installed in the reverse order of removal. The difficulty lies in installing the oil pump in place.

Rear oil seal

It is necessary to replace it if an oil leak appears and lubricant gets onto the clutch discs. Because of this, clutch efficiency drops significantly or disappears completely.

Back cuff

The reason for the appearance of oil on the clutch discs may also be the front oil seal, the replacement of which we will talk about later.

To replace the rear crankshaft oil seal, follow these instructions:

• De-energize the car by disconnecting the negative terminal from the battery;
• Remove the flywheel;
• Remove the clutch housing rear shield;
• Using a socket wrench, remove the rear oil seal holder mounting bolts;
• Remove the oil seal holder, taking the sealing gasket along with it. It will be replaced when installing a new rear oil seal;
• Using a vice, clamp the holder into place. Arm yourself with a mandrel (such as a core) and press the damaged rear oil seal out of the holder;
• Clean the holder with a rag, removing all dirt. Make sure that the holder has no mechanical defects, damage, or chips. If they are, you will also have to change the holder itself;
• Having picked up a new, quality-tested oil seal, arm yourself with a mandrel that matches the diameter of the oil seal. This will allow you to press the element into place. Please note that the cuff must be mounted with the working edge inward;
• Be sure to change the rear oil seal holder gasket. This recommendation does not depend on the condition of the old gasket;
• To facilitate the process of fitting the oil seal onto the crankshaft flange, make a small chamfer around the perimeter with a needle file;
• The edge is lubricated with ordinary engine oil, like the crankshaft flange, after which the element is put on the holder;
• Using a wooden stick, straighten the edge of the cuff;
• Reassemble the structure following the reverse dismantling sequence.

Before assembly, make sure the front oil seal is in good condition. If there are signs of wear, deformation, or oil leakage, it is better to also replace it along with the rear crankshaft oil seal.

Replacement Guide

Before you begin, make sure you have all the necessary materials on hand. Read the instructions carefully and watch the video.

Front cuff

The front cuff is in a more convenient place than the back one and wears out faster, so let's start with it.

Tools

To change the front crankshaft oil seal of a VAZ 2109, you need standard tools that almost any car owner has:

• a set of keys, sockets and screwdrivers;
• rags;
• capacity.

This video shows one of the replacement methods for a VAZ 2109. It also explains what caused this malfunction.

Stages

1. As with other work related to the power unit, the first thing you need to do is turn off the power to the car. To do this, remove the negative terminal of the battery.
2. Now you need to loosen the bolts that secure the generator.
3. We directly remove the belt drive itself.
4. Drain the engine oil into a prepared container.
5. We dismantle the protection of the power plant.
6. Remove the oil pan.
7. Remove the camshaft belt. Here you need to act carefully and carefully. The crankshaft and camshaft must under no circumstances turn. Otherwise, the valves may be damaged due to the pistons hitting them.
8. Remove the crankshaft pulley. This is done using two screwdrivers.
9. The key will also need to be removed.
10. After unscrewing the two bolts, we remove the oil receiver.
11. Next, unscrew the six bolts and remove the oil pump.
12. Take a large flathead screwdriver and remove the old cuff.
13. Now you need to thoroughly rinse the pump cover with gasoline and wipe it off.
14. The place where the new cuff will be installed must be lubricated.
15. We install the new one so that its working part is directed inward.
16. We press in the cuffs using a mandrel of the appropriate diameter.
17. We return the pump to its place.
18. Now all that remains is to install the dismantled components and parts in reverse order.
19. Pour the drained lubricant into the motor. You can, of course, take advantage of the opportunity to replace it.

That's it - the procedure is completed.

It is not necessary to remove the oil pump; you can change the front oil seal in place, just like the rear one!

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Back cuff

The rear cuff is located in a slightly different place and to replace it we will have to work a little more.

Tools

To replace the rear oil seal, we will need almost the same tools as when replacing the front one.

Stages

1. Disconnect the negative terminal of the battery.
2. The first step is to remove the flywheel.
3. Next, remove the rear shield of the clutch housing.
4. Unscrew the bolts that secure the rear cuff holder.
5. We dismantle it along with the gasket.
6. Place the holder itself so that it is convenient to work with it.
7. We remove the old cuff from the holder.
8. Use a rag to thoroughly clean the holder. Immediately inspect its condition to see if there is any damage - chips or cracks; if such occur, then it must be replaced.
9. We install a new one in the socket.
10. Using the appropriate diameter of the mandrel, press it in. Make sure that the working edge is turned inward.
11. Regardless of the condition of the holder sealing gasket, it needs to be replaced.
12. We lubricate the edge and flange of the crankshaft with machine lubricant.
13. We install the holder.
14. We install the removed components and parts.

Replacing the front crankshaft oil seal on a VAZ 2108, VAZ 2109, VAZ 21099

Welcome! Today you clicked on this link not by chance, since you are looking for detailed instructions on how to replace the front crankshaft oil seal, then we will provide it to you. The instructions for replacing the oil seal will apply only to cars of the Samara family. At the end of the article you can find a visual video that describes in detail the replacement of the crankshaft oil seal!

Summary:

Where is the front crankshaft oil seal located? • It is located in the oil pump cover itself, or to be more precise, it is located on the toe of the crankshaft. In order to see it you will have to remove the timing belt cover. (You will learn how to remove the timing belt cover in this article as we proceed)

• When the cover is removed, turn your attention to the lowest crankshaft pulley, which is indicated by a red arrow in the photo. It is under this pulley that the front oil seal is located.

When should you replace the front crankshaft oil seal? It must be replaced if:

1. The appearance of various kinds of cracks, breaks and defects on it.

2. The oil seal must also be replaced when it becomes oily, that is, when oil leaks are detected on the oil seal.

Note! It is not always necessary to immediately change the oil seal when oil leaks are detected, because oil can also ooze through the oil seal for the following reasons:

• When the crankcase ventilation system is dirty. (You can learn how to clean the ventilation system from the article specifically dedicated to: “Cleaning the system”)
• And also when the hoses of the crankcase ventilation system are strongly pinched. In this case, inspect all system hoses for kinks and correct the problem if possible.

What's next?

After draining the oil from the car engine, unscrew and remove the pan. Then the two bolts securing the middle main bearing cover are unscrewed. It is removed and the gap between the bearing and the half ring is measured using feeler gauges. You should add to it the standard parameter of 2.31 mm.

As a result, the required size of the new half ring will be obtained. After this, by displacing the old half-ring, they are installed in their nests. It is important that the new element fits in freely. After the work has been done, all removed parts are installed back.

So, we found out how to replace the crankshaft oil seal (including VAZ 2109). The driver needs to monitor the condition of the sealing elements, check the free axial movement of the crankshaft, so that further operation will be without negative consequences.

Preparatory work

This sealing collar began to be used in the very first cars and, due to the simplicity of its design, is used in the modern automotive industry to this day. During operation, the oil seal practically does not touch the surface of the rotating surface; the gap between the parts is sealed due to the vacuum created by special notches on the end of the sealing collar.

Replacing the front crankshaft oil seal on a VAZ 2109

In order to start replacing the crankshaft oil seal, you need to collect the appropriate set of tools, including:

• Spanners of different solutions;
• Screwdrivers of different diameters;
• Rags;
• Bucket to drain engine oil;
• Hammer;
• The diameter of the mandrels coincides with the diameter of the oil seals.

Before starting the main work, you need to do the following:

• De-energize the car, or rather the engine compartment, separating the wires from the battery;
• After this, it is necessary to loosen the bolts that are attached to the generator compartment, then remove the belt; The field drains the oil into a bucket;
• The engine protective cover and oil pan are removed;
• The toothed belt driving the camshaft is dismantled.

Upon completion of the preparatory work, you can begin the main work, that is, replacing the front and rear crankshaft oil seals.

Where is?

Before you start replacing, you need to have an idea where they are.

The front one is located directly in the oil pump cover, or more precisely, on the toe of the crankshaft. To get to it, you need to remove the cover covering the timing belt.

Front oil seal location

The rear one is located behind the clutch system and to replace it you will have to dismantle a number of bulky components.