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Reading time: 11 minutes. Updated 08/04/2019
Replacing the crankshaft pulley oil seal (negative result), as well as changing the oil and adding antifreeze
The cold has arrived on you too! I open the hood and there is oil all over the front cover of the engine. After looking at the whole thing a little, it turned out that oil was flying from under the crankshaft pulley. I did a little searching on the Internet about what and how, bought what I needed and went ahead with a friend to change the oil seal. We removed the hood to make it easier and started. In principle, everything went well, there were only minor problems with the pulley nut, in order to break it you had to put on a 38 key and rest it against the stabilizer and with short turns of the key, break it off with the starter, but there was one catch, a 38 key that I bought in the store “Samara” for 850 local money turned out to be made of such shitty metal that at the first pull of the starter it simply bent, I thought that was ALL! At this point the repair was completed, but then the father brought out a normal peasant wrench for 36-38 made of durable alloy, put it on, a friend turned it with the starter, the nut was easily unscrewed. photo of keys:
We replaced the oil seal, having previously lubricated it on the outside with sealant, cleaned the pulley and the seat for the oil seal and rinsed it with gasoline. We attached the pulley, tightened the nut, changed the oil in the engine, with an oil filter, by the way, like many people I probably don’t have a special one. a wrench for unscrewing the oil filter, some people twist it with a belt, but I hammer a screwdriver into it and unscrew it. It's not the same for everybody :-). Even after replacing the thermostat (I changed it in the fall), the car practically does not reach operating temperature, and now it’s generally so cold, well, just on the sly, we covered the radiator with cardboard and removed the fan from the pump pulley, now it’s better, the car warms up noticeably faster, and Even when the thermostat opens, the engine does not cool as much as before. Also, in the process, opening the radiator cap, a lot of air came out (I think it’s because of the heater radiator, which leaks a little, I already bought a new one, I’ll change it soon), lifting the front part of the car, they filled in antifreeze, about a liter o_O came in, I was shocked, after This made the stove heat better. While they were pouring antifreeze, we saw for the first time an unusual spiral inside, I personally, without attaching any importance to it, pulled it out. Here is a photo:
The crankshaft oil seals (cuffs) act as plugs that lie at the ends of the shaft to prevent oil from leaking out and dust from entering the engine. Signs of wear on the crankshaft seals, both front and rear, are splashing and oil leaks. The standard service life of oil seals is no more than 150 thousand km.
When is it necessary to replace the crankshaft oil seal?
- if an oil leak occurs in the pulley area, or at the junction of the engine and gearbox;
- when the oil seals are “squeezed out”, that is, they are displaced outward from their places, which indicates increased oil pressure;
On the injection model there is a crankshaft position sensor; it measures and synchronizes its rotation frequency with the fuel supply. If the sensor has limited the engine speed, then the reason is also a faulty oil seal. The sensor is placed on the oil pump cover.
What reasons lead to premature wear of oil seals?
- poor material, counterfeit parts;
- increasing engine speed, using low-quality fuel, incorrect ignition timing;
- engine overheating;
- long-term operation on old oil and a dirty filter.
During winter operation of the car, the breather can become clogged with snow, and the increased gas pressure can “squeeze out” the seals.
The front seal changes much faster than the rear. To replace the rear one you need to spend much more time.
Regardless of which oil seal (or both, as recommended by the experts) will be changed, the following is required:
- put the car in the pit.
- de-energize the battery;
- engage first gear to lock the crankshaft;
- securely secure the vehicle with the parking brake.
Replacing the rear oil seal
Now we are changing the rear crankshaft oil seal (cuff) on the VAZ 2107. This will require more time, patience and strength, since to access it you need to disconnect the gearbox. All preparatory work is carried out to the same extent, but the car is in neutral gear. Since you need to hang the rear wheels, you need to do this in a pit, and not on an overpass. The external size of this oil seal is 90 mm, and the internal size is 70.
First you need to disconnect the cardan from the gearbox:
A car's engine can become oily for various reasons, but mainly oiling occurs precisely when the oil seals are deformed, which need to be replaced from time to time with new ones.
Note! To replace the front crankshaft oil seal, you will need to take with you: Wrenches, as well as a special “36” wrench, which is designed for unscrewing the crankshaft . You will also need a couple of screwdrivers, it would be advisable to also stock up on a mounting blade, mandrel, hammer and bit!
Summary:
Where is the front crankshaft oil seal located? The oil seal is located in a special hole allocated for it in the camshaft drive . In order to at least visually understand where the oil seal camshaft drive cover is circled in red , and the blue arrow indicates the crankshaft pulley immediately behind which the oil seal .
When should you replace the front crankshaft oil seal? As mentioned above, the oil seal must be replaced if various types of deformation are detected on its surface, due to which engine oil will immediately begin to flow out of the car engine seal
We all know that when the engine is running, the car’s crankshaft rotates, so when the engine is running, due to a deformed oil seal, oil can come out of the engine in a splashing stream, which is why usually the entire front part of the engine will always be oily.
Question? Why are you changing the crankshaft seal ? (Write your answer in the comments)
Where is?
The oil seals are located in small holes on the camshaft drive covers. Being at the ends of the shafts, they perform two roles, the first is to prevent oil from leaking out and the second is to protect the components from dust and dirt entering the system. The camshaft cover is circled in red in the photo. The blue arrow shows where the crankshaft pulley is located, behind which the cuff is located.
Shaft cover
How to replace the front crankshaft oil seal on a VAZ 2101-VAZ 2107?
Note! At the moment there are two ways to replace the front oil seal , one of them is fast and the other is slow but more careful, which one you choose is up to you! (The slow method is described in the article. And the fast method is described in the video clip which is located at the very end of the article)
Removal: 1) At the beginning of the operation, remove the camshaft from the vehicle engine. (How to remove the cover, see the article: “ Replacing the chain tensioner shoe,” in paragraphs “1-8”)
Note! the oil seal before and have experience in replacing it, then the camshaft drive does not need to be removed from the car engine, but the oil seal can be replaced immediately on the installed cover.
But there is one “But” here! If we take into account that there will be little space for replacing the oil seal, then there is a possibility that the oil seal will be pressed into the drive cover with a distortion, which may require repeated replacement of the oil seal, but only with the cover removed!
the oil seal using a hammer and punch .
Note! to remove the oil seal only from the inside of the cover, otherwise removing the oil seal will be problematic!
Installation: 1) First, lubricate the new crankshaft oil seal , and then install it on the outside of the cover in its place. When installing the oil seal, be sure to orient its working edge towards the centering protrusions, which are indicated by the letter “A”.
Note! So that you understand what the working edge of the oil seal is, look just below the photo and you will understand that the working edge differs only in the presence of a spring!
2) Next, using a mandrel of a suitable diameter and a hammer, press in the oil seal until it stops.
3) Now pick up the previously removed camshaft and look at its condition; if it is severely compressed or deformed, then replace the old gasket with a new one.
Note! To ensure that leaks through the camshaft , it is recommended to apply a thin layer of silicone sealant to it on both sides.
And for the convenience of installing the cover, it is recommended to glue the gasket to the cover itself with glue so that it does not fly off during installation!
4) Next, install the cover together with the gasket installed on it in its place, and then tighten all the bolts and nuts that secure this cover.
5) Then, using a special mandrel, center the drive cover so that it is level with the crankshaft .
Note! If you don’t have a special mandrel, then use the previously removed crankshaft to center the cover, but how to do this, you ask? To do this, install the crankshaft , and then tighten the nut securing it!
6) Now lightly tighten all the bolts and all the nuts securing the camshaft .
7) And then finally crosswise tighten all the bolts and nuts that secure the cover.
Finally, tighten all the bolts that secure the oil pan to the engine.
Note! After the entire operation has been completed, install all remaining parts in the reverse order of removal!
Additional video: Don’t know how to replace the front crankshaft oil seal ? Then, in this case, check out the video, which describes in detail the instructions for replacing it.
Video “Replacing the crankshaft pulley on a VAZ classic”
This video talks about oil leakage due to wear on the crankshaft pulley.
The front oil seal of the VAZ 2101-2107 engine is used to prevent engine oil leaks in the place where the accessory drive pulley is attached to the end of the crank. Although the sealing lip is made of high-quality fluorine rubber, over time its working edge wears out and lubricant leaks into the gap. Today we will share a method for replacing the front crankshaft oil seal of a VAZ “classic”. Even a novice driver can cope with the job, because to do this you don’t even have to remove the camshaft drive cover from the engine.
In what cases should the pulley be removed?
Most often, it is necessary to dismantle the crankshaft pulley when changing oil seals. The role of the O-rings is to prevent oil from the crankcase from reaching engine components. Over time, the seals wear out, crack, and as a result, oil leaks appear. To fix this, you need to change the seals. During this procedure, you have to remove the crankshaft pulley.
Also, the need to dismantle the crankshaft disk arises when replacing the timing belt on a VAZ 2107 injector. It is changed according to the regulations specified in the operating instructions for the VAZ 2107 injector, as it wears out after a visual inspection or if it breaks. During a technical inspection, the pulley must be inspected to identify any defects. If chips or scratches are found, the part should be replaced.
Damaged part with broken part
The procedure for removing the product itself is not difficult, but some problems arise.
Firstly, with access. The pulley we are interested in is located in the lower part of the engine compartment behind the generator. It is difficult to get to because other engine components are in the way. Before removing the pulley, you need to remove the alternator and power steering belt.
Secondly, the crankshaft pulley mounting nut is very difficult to unscrew. When it is put in place, it is screwed with great effort. This is necessary so that it does not unscrew accidentally while the car is moving, as this can lead to expensive repairs. While the engine is running, the nut is tightened even more. In addition, the process is aggravated by high operating temperatures, at which oil coking and metal corrosion occur under the influence of the external environment.
Why does the oil seal wear out prematurely?
- use of counterfeit spare parts;
- pouring low quality gasoline into the vehicle, constantly running the engine at high speeds;
- motor overheating;
- dirty filter and untimely oil change in the car.
The front oil seal is the easiest to change. The rear one needs to spend much more time.
To replace the oil seal you need to perform a number of simple manipulations:
- The vehicle is driven into a pit;
- The battery is de-energized;
- We start the first gear to fix the crankshaft;
- Fixing the vehicle
Removal instructions
With the clutch disengaged, the crankshaft can be easily turned with a wrench.
To carry out the removal procedure, it is necessary to secure the shaft from turning.
There are special devices that are bolted to the pulley into the technological holes, preventing the shaft from turning. If there is no such device, then you need to install supports under the wheels and place the car on the fourth. You can also secure the crankshaft flywheel by inserting a long screwdriver or pry bar between its teeth.
Why do you need to change crankshaft seals?
Oil leaks on the rain cover may also indicate wear of the crankshaft oil seal.
Replacing parts that have expired and do not perform the necessary functions allows you to avoid failure of other parts, which extends the overall life of the vehicle.
Replacing crankshaft oil seals does not depend on operating time or total mileage. It depends on the:
- Operating conditions.
- The age of the car.
- Driving style.
- Periods of engine maintenance and prevention.
Oil seals can be changed in a timely manner if cracks are visible on their surface and the rubber loses elasticity . Such measures will significantly extend the life of the motor.
Consequences
A worn oil seal is no longer able to hold oil, which begins to come out and settle on surfaces.
If you do not change the seals in time, this can lead to the following consequences:
- Oil consumption will increase significantly.
- Dirt will begin to accumulate under the hood, which can lead to unstable engine operation.
- Rubber parts under the hood that get oil on them will begin to deteriorate.
- If oil gets on the battery terminals, it will break the contacts and, accordingly, there will be problems with starting the car.
And the oil seal may simply suddenly collapse, which can lead to undesirable consequences on a long journey.
Why is it necessary to change on time?
Naturally, timely repair of parts that have become unusable will extend the life of both the engine and the VAZ-2110 vehicle itself. The time after which it is necessary to change the oil seal directly depends on how old or new the car is, on the driving style of the car owner and operating conditions.
If you change them in a timely manner, this will help reduce the cost of car repairs, because such measures eliminate engine oil leaks, which negatively affect the operation of the engine.
If you do not change it in time, the VAZ-2110 car will “eat” more motor oil, and the engine itself will begin to collect dirt and dust, which cannot but affect the stability of its operation. Engine oil leaks negatively affect car parts that are not made of metal, and the contact in the terminals will become much worse, which, in turn, will affect how the car starts.
Any car has parts, for example, crankshaft cuffs, that need to be changed according to the manual or as they wear out. Replacing the VAZ 2110 crankshaft oil seal, as well as valves, can be done at a service station or with your own hands.
