When operating VAZ-2110, 2114, 2115, owners are faced with the problem of engine oil appearing in the air filter and corrugation. This happens in 8-valve and 16-valve engines. As a result, the air filter clogs prematurely and loses the required capacity, and this leads to a change in the parameters of the fuel-air mixture. The car's power decreases, and the engine wears out more intensely. Often the appearance of oil in the air filter and bellows leads to failure of the mass air flow sensor, which will require its replacement.
Reasons for the appearance of oil in the air supply system
To make sure that the engine is throwing oil into the air filter of the VAZ-2110, 2114, 2115, it is enough to disconnect the corrugation, in which you can see oil splashes and drips. Sometimes when replacing a filter you can see that it is not just dirty, but saturated with machine oil. To identify the cause of oil getting into the air filter, you need to completely remove the pipe so that it does not interfere with operation, for which you need to loosen the clamp and disconnect it from the throttle valve.
This will open a tube above the throttle valve with a hose connecting it to the valve cover, where excess oil is supplied. You need to remove the rubber tube from the valve cover and try to blow it out. If the throttle tube is not blown through, it means the system is clogged, and this is the reason for the appearance of oil in the corrugation and air filter. This situation is due to the fact that the oil does not return to the cylinder block through a rubber hose, but is discharged under pressure into the air supply system, first of all into the corrugation, and then to the air filter.
Much less often, squeezing oil into the air filter bellows indicates severe wear of the piston group, in which case a major engine overhaul will be required, but more often the problem lies in the obstruction of the throttle valve tube described above. It happens that the rings on the pistons have already come together in a row, they leak oil, and the engine requires serious repairs, while no traces of engine oil are observed on the air filter and in the bellows, they are absolutely clean.
Why repair or replace a damaged pipe?
If the inlet pipe of the air filter, located between the latter and the engine, is damaged, uncleaned air that has not been filtered will be sucked into the engine. What this can lead to was discussed above. The consequences of failure of the air intake pipe in front of the filter are also obvious. Firstly, it will take air from a place not intended by the designers, which means it is either not cool enough or not clean enough. In the second case, the filter will become dirty faster and will not be able to provide the engine with the required volume of air - the engine will begin to “suffocate”, its power will decrease. Secondly, a torn pipe, and especially one shortened compared to the original length, will not be able to fully protect the filter from road debris and dirt, which, again, will lead to rapid clogging of the filter element. This function of the air intake pipe was mentioned above.
Purchasing and installing a new air intake pipe will cost much less than frequently replacing the air filter. The cost of the pipe between the filter and the engine is nothing compared to the cost of repairing the latter. Even in extreme cases, when it is not possible to buy or there is no high-quality, necessary product on sale, you cannot leave the pipe in a deplorable condition. You should try to repair it using tape, adhesive insulating tape, cuttings or fragments of other pipes.
How to prevent oil from getting into the air filter
The simplest solution is to simply break through the clogged tube using soft wire with a diameter of 0.8 mm. But since the entrance to this tube is angled, you need to act very carefully, in addition, this does not always lead to successful cleaning of the tube. When the connector is cleaned with wire, you need to try to blow out the tube again; if air flow is restored, oil will no longer get into the air line.
You need to blow through the throttle tube through a rubber hose; this can be done with your mouth, using a special syringe or a hand pump, which will help create sufficient pressure. When the pipe is cleaned, air passes freely, and oil will not enter the engine air supply system, being discharged into the cylinder block; the bellows and filter will remain dry and operate normally.
Why is the Priore corrugation needed and why is the Priore corrugation replaced?
A running engine transmits vibration to the exhaust system and body. To reduce its level, reduce noise from the exhaust wave, as well as chatter, loads on other elements (for example, to protect against the risk of loosening suspension elements) and overheating of the pipe, a corrugation is installed on the Lada Priora. It seems to serve as a buffer between other more expensive parts and the risk of their breakdowns.
In appearance, the corrugation resembles a flexible tube with a metal braid. Made from high alloy stainless steel.
Two most important characteristics of corrugation:
- Plastic. The corrugation should, like a spring, bend easily to compensate for the effect of vibration on the exhaust system during engine operation and while the vehicle is moving.
- Tightness. If it is broken, then no matter how well the corrugation compresses and stretches, its use does not make sense.
The two main types of corrugation are with double or triple outer braid. Double-braided corrugations are more often purchased for cars with a gasoline engine; they are more flexible and have a lower price (although the difference in price is not so great). With triple braiding, which is more rigid, it is used for both gasoline and diesel vehicles. It makes sense to install it on used cars as well.
Cleaning the throttle body
If it was not possible to pierce the tube with wire, you need to completely dismantle the throttle valve. This is done as follows:
- the pipes approaching the damper from above are removed;
- the latch is removed and the cable controlling the gas is removed;
- the electronic throttle position sensor is disconnected;
- unscrew 2 13 nuts securing the damper (one higher, the other lower).
The throttle valve is easily removed from the engine block, after which it needs to be cleaned. This does not require additional equipment and tools; all work can be done in a regular garage.
To clean the throttle valve, we take the same wire with a diameter of 0.8 mm and clean the tube from the reverse side. We periodically use a cleaning aerosol that will help wash away any remaining carbon deposits and other debris from the pipe. You can use a liquid lubricant like WD-40, which also removes carbon deposits and other contaminants well. After this, the pipe is purged again, and if air passes through it, the throttle valve is replaced and engine oil will no longer appear in the air filter.
When assembling the air filter, you need to thoroughly clean the corrugation so that there are no oil stains left on it. If the filter itself becomes dirty, it is better to replace it, otherwise the air supply to the engine will be difficult, which will negatively affect its operation. After this, the car can be operated normally.
To check the effectiveness of the repair, after a month it is advisable to remove the air filter bellows and carefully inspect it. There should be no oil drips or splashes in its opening. If they appear, you need to clean the throttle tube again using one of the proposed methods. But recurrence of the problem after a month of operation is rare.
Video: oil in the air filter and bellows, cause and solution
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Basic faults
There are many muffler malfunctions, but the most common are two:
- Problem with lambda probe. The lambda probe is a sensor that monitors the emission of waste substances to ensure ideal operation of the exhaust system. The sensor fails after a hundred thousand mileage. Unfortunately, the sensor is not repaired, but replaced with a new one.
- If you hear a characteristic knocking sound in the muffler, this may also indicate that a crack has formed in the muffler itself. This symptom is confirmed by the noise increasing as the engine speed increases and decreasing when the engine is turned off. The malfunction can be eliminated in two ways: by welding or completely replacing the part, and the second option, of course, is more reliable.
Replacing the muffler corrugation
In this video, I will show you how to repair a car exhaust system. Replacing the muffler corrugation
, Opel.
