Replacing the crankshaft rear oil seal: step-by-step instruction

Every car owner tries to keep the car clean. However, many people forget about the cleanliness of the engine compartment. Specialists recommend to perform an external cleaning of the power unit every 1-2 years. But this operation will be effective only if there is no leakage of oil on the gaskets and other sealing elements. And today we will look at how to replace the rear crankshaft oil seal with our own hands.

How to determine?

Determine this fault is very simple - by hanging drops of fresh oil between the clutch housing and the engine. It is worth noting that the removal and installation of this element, as well as repair of running gear, is performed in the inspection pit, and best of all - on the lift.

How to do?

Let's look at how the rear crankshaft oil seal is replaced with our own hands. To do this, remove the gearbox. Preliminarily fix the machine with the help of stops and proceed to the dismantling of the transmission.

Removing the gearbox on the rear drive

It is worth noting that this procedure has differences in front-and rear-wheel drive cars. So, in the latter case, the cardan shaft, which is fastened to the rear gearbox on bolts, is dismounted. Next, to remove the transmission, turn off the negative terminal and take out the starter. We also need to remove the clutch slave cylinder. Experts recommend removing it with a hose. When dismantling, pay attention to leaks. If the cylinder anther is damaged or there are traces of fluid on hoses and seal points, these parts should be replaced with new ones. Otherwise, you literally lose the grip - the entire level will flow out, through the cracks in the hose or anther. After that, loosen the bolts securing the gearbox along the contour. On frame cars it is attached to the "suspension" - as a rule, it is supported by 4 bolts. Also, the shift knob is unscrewed. In the future, it will interfere with us. Then the box can be safely removed.

It is important to know

When dismantling, remember that the weight of the transmission can be several tens of kilograms and one to cope with the dismantling will be difficult. If possible, call for an assistant. Also from the transmission will drip the oil, since there are no sealing holes - this is normal. The gearbox is placed on a wooden surface. Do not put it on the asphalt - so you will damage the important structural parts of the transmission. If the dismantling is obstructed by the silencer pipe, first remove it from the outside. When assembling the elements of the exhaust system, it is better to put new gaskets (between the intake pipe and the catalyst, as well as the resonator).

Front-wheel drive

To do this, you will need a jack. We unscrew the semi-axle nut, lift the front part of the car and remove the left wheel. If the stand comes out with difficulty, you can dismantle the steering wheel. Next, unscrew the nut of the second semiaxis and be heated using a copper inset. It is necessary to remove all the "hinged" from the box. This can be a cable and a speedometer sensor, clutch, backstops, reverse wires. Then the gearbox mounting bolts are removed in a circle. The latter is shifted with semiaxes. To disengage the gearbox from the engine, loosen it slightly and slide it back. Then it is necessary to remove the clutch basket and flywheel - for this use the head and a ratchet wrench.

Tip

Replacing the rear crankshaft oil seal - the procedure is very serious, requiring the dismantling of many components. To make the assembly not time-consuming, we put all the bolts from each unit into a separate box. It is advisable to sign each of them, for example, "propeller shaft mounting bolts". Even with enough experience, do not ignore this advice. Practice shows that the assembly of elements in this way takes much less time.

What to do next?

After that, the replacement of the crankshaft rear oil seal is made equally on the front and rear-wheel drive vehicles. To dismantle the old element, you must use the self-tapping screw. It is screwed onto the edge of the crankshaft seal. Having twisted it on some turns (to metal), we take in hands pliers and we take out an epiploon outside. If the size of the crankshaft rear oil seal is too large and it is difficult to exit, you can screw in the second screw and pull out the element with two hands and tools. You can also use a special puller. Then it is necessary to remove the body of the rear sealant and, after installing a new one there, put it back. It often happens that the gasket of the case is damaged, so we carefully look at its condition and, if necessary, replace it. In addition, the replacement of the crankshaft rear oil seal assumes that the bearing is operational (it includes the primary transmission shaft). It is diagnosed like any other bearing - if it is noisy or jammed during rotation, it is no longer subject to further exploitation. When installing the clutch basket, it is important to pay attention to its integrity. If the petals are bent inside or unevenly, and the knot itself has cracks, it must also be replaced. The squeeze bearing is also checked for malfunction. The clutch fork must not have cracks. If it finds the slightest defects, it must be replaced. It is inexpensive - as a rule, 300-500 rubles for domestic cars.

When assembling it is important to center the clutch basket to the disc. An unremarkable lifhak from experienced motorists - use the primary gearbox for this. Install it in the hole, and then - secure the clutch mechanism. After this, the gearbox can be safely installed in its place.

Why is the crankshaft rear oil seal leaking?

One of the most common reasons is the presence of vibrations. With mileage, wear on the inside of the seal increases. As a rule, the resource of the element is 100 thousand kilometers. When this mileage is reached, experts recommend not only to replace this part, but also to diagnose and repair the running gear. Not only shock absorbers and struts for the vibration damping ability, but also silentblock suspensions are checked. It is also possible to dry out the stuffing box due to long parking. For example, this happens if the car "overwintered" in the garage. Curing and drying of the seal entails premature wear and tear (loose fitting of the part to the plane). The new item is numbered by the brand of the car. For example, the crankshaft oil seal for Kopeyka is 2101-1005034. As for new elements, the sealant can leak due to improper installation. This happens because of its uneven placement on the plane. But this is not always the case. The leakage of the new stuffing box is due to the increased pressure of the crankcase gases. As a result, they simply squeeze the sealer outward. The element is displaced, a leak is formed. Also, the malfunction is caused by a punctured oil filter. The presence of streaks on it indicates a poorly fitting sealing element. By the way, a new filter must be twisted with one hand. Do not clamp the device categorically.

Conclusion

So, we figured out how to replace the crankshaft rear oil seal. As you can see, you can do this yourself. The main thing is to correctly sort the bolts, so that the assembly does not turn into a continuous torment.