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Defective crankcase ventilation / KGE? Our information!

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Recently updated on September 21, 2023 at 07:50 am

Defective crankcase ventilation / KGE? Our information!

[Update: 21.09.2023] This post was updatedto take more recent information into account. Who makes a defective Crankcase ventilation noticeable? And why is there a crankcase ventilation at all? The "blowby" gases (these are gases that pass from the combustion chamber past the piston into the crankcase and are sometimes normal) and the change in volume of the moving pistons make one vent from the crankcase  necessary. If it weren't there, a Overpressure build up, the one Overuse the components and seals. A Schaden would be preprogrammed. And at best separates the ventilation also that Olive oil (Oil mist) from the air / exhaust gas / oil mixture. That makes a possible Oil separator.

Defective crankcase ventilation - symptoms?

The mixture of gases will be out For environmental reasons back into the intake tract of the motor directed and should be so little oil as possible include. If there is an above-average amount of oil, the well-known coking occurs Abgasrückführungsventil (EGR) or the intake tract. But that's another topic!

Defective crankcase ventilation / KGE? Our information!

  • Out of round Engine running, engine jerking. (usually occurs particularly strongly in the cold state)
  • Increased Oil consumption.
  • Appropriate Entry in the fault memory of the vehicle, for example in relation to False air, etc.
  • Fluctuating Idle speed, possibly Saw of the motor.
  • Im Neutral the engine suddenly stops.
  • Engine control lamp shines .
  • An Hisswhich can be heard in the area of ​​the crankcase ventilation.

How can problems with crankcase ventilation arise?

Defective crankcase ventilation / KGE? Our information!

Basically is False airentering the system for the symptoms mentioned responsible. This happens when the components of the crankcase ventilation leaky be or brechen. Reasons for this are how already at the beginning addressed, including the general aging of the components, a high thermal load and also the oily blow-by gases. When it comes to a bigger one damage comes is also the formation of Oil vapor possible in the engine compartment.

Can I continue driving with a defective crankcase ventilation system?

As it may be that the mentioned Symptoms Auch another reason you should get into that asap Workshop drive so there the exact Cause for the problem diagnosed can be. Normally there are no major ones consequential damagesif you despite the defective crankcase ventilation continue, but it can be yet. It all depends on which part the crankcase ventilation Defekt having.

How does the repair work?

Defective crankcase ventilation / KGE? Our information!

How the repair ultimately proceeds depends on the method of construction of Motors from and also from how well reachable This is. As a rule, it is necessary to have various components such as Airbox or the throttle expand. You should also know that in the event of a defect not always all parts exchanged Need to become. In some cases, it is enough to have that Valve of Crankcase ventilation to exchange, If the Plot for the problems that arise Defekt of Crankcase ventilation pipe is it is enormous wichtigthat you check that yet Plastic residue im Suction area available. If that is the case, it can be too expensive consequential damages come when the residues are not removed.

What does the repair cost?

Defective crankcase ventilation / KGE? Our information!

How high they Costs failing to repair depends on what the cause of the problem is and which engine is installed. The Material costs are not particularly high and are usually only 20 to 200 EUR. VAICO, RIDEX, TOPRAN Febi Bilstein and Meyle are well-known brands that offer such Spare Parts to produce. In addition to the costs, there are those for the workload become due. In most cases, the repair takes between approx. 30 Minutes and 2h claimed. If we assume an hourly wage of EUR 70, the result is: Costs between 35 and 140 EUR. So overall you have to deal with an amount between 50 and 300 euros expected.

Defective crankcase ventilation and the HU!

As already mentioned, most of the time False air into the system drawn. Which part of the crankcase ventilation is defective is shown here not significant. That false air can ultimately be responsible for you emissions test not pass. Because of this, you should still before the main inspection take care of solving the problem. The mentioned is also possible Light up of Engine control lamp a problem. If this lights up at the time of the main inspection, the inspector will issue the sticker refuse. The illumination of the MKL counts as gross defect.

What to look for when buying a used car?

Defective crankcase ventilation / KGE? Our information!

Due to production, some engines tend to vent the crankcase sooner or later for Problems ensures. Therefore, you should primarily consider purchasing one Used cars watch out for the symptoms above.

Overview of the important facts:

  • Generated during combustion Blow-by gases flow into the crankcase. Due to the Environmental protection not without further ado draußen. Hence, they are given by a Oil separator filtered and afterwards again the combustion fed. The Crankcase ventilation.
  • It's not always easy to find one Defekt the crankcase ventilation ascertainbecause the Symptoms Law unspecific and the entries appearing in the error memory often for another defect speak.

By the way: As already mentioned, diagnosis is not always easy. At a Petrol engine it can help briefly with the engine running oil filler cap to open. If no defect present, should be a short Change of idle speed to make noticable. If that is not the case, this is an indication of a defective crankcase ventilation, because if there is a defect False air is in the system. You can also use a Leak detection sprays can Pipes of ventilation spray. When it comes to a Change of speed If it comes to idle, this suggests that the corresponding location leaky at a hunt.

Find and repair tutorials

https://www.youtube.com/watch?v=WMFplyrJVUA

Everything about crankcase ventilation

The Crankcase ventilation is an essential element in the vehicle that ensures that there is no excess or negative pressure in the crankcase. A properly functioning system is important not only for the performance of the engine, but also for its longevity.

Effects of a defective crankcase ventilation

If the crankcase ventilation is defective, this can have serious consequences. Incorrect air can get into the system, which is particularly problematic when testing emissions. The incorrect air distorts the results of the exhaust gas measurement, which can lead to the test failing. In more modern vehicles, diffuse error messages can also be stored in the error memory. Increased vacuum in the crankcase can also cause the engine to sweat oil and various seals and other components to suck in dirt particles from the air.

The symptoms of a defective crankcase ventilation are varied: A increased oil consumption, the engine stalling when idling, speed fluctuations, a hissing noise in the ventilation area or the check engine light can be signs. If you notice that your crankcase ventilation may be defective, you should not immediately stop in a panic, but you should still go to a workshop as soon as possible. Prolonged operation with a defective crankcase ventilation can lead to further damage to the engine.

Things worth knowing about crankcase ventilation

It is important to know that almost every car engine has a crankcase ventilation system. For environmental reasons there has long been one closed crankcase ventilation required by law. Truck engines are also increasingly moving towards closed systems in order to comply with environmental regulations. An essential component of many crankcase ventilation systems is the Oil separator. This prevents the engine from becoming dirty by filtering oil particles from the escaping air. A mixture that is too lean, caused by too much air supplied, can have serious consequences. This can cause the engine to overheat and, in the worst case, damage pistons or valves.

Conclusion

Crankcase ventilation is a critical system in every vehicle. It ensures that the engine works efficiently and prevents potential damage. If there are signs of a defect, you should act quickly and consult a workshop.

Defective crankcase ventilation / KGE? Our information!

Of course that had not happened yet!

tuningblog has countless other articles on the subject of car and auto tuning in stock. Do you want to see them all? Just click HERE and look around. In part, we would like to provide you with news but also off the tuning. In our category Tips, products, information & Co We have reviews of car or accessories manufacturers, new ones Tuning Wiki Terms or one or the other Leak veröffentlicht. Following an excerpt of the last articles:

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Defective crankcase ventilation / KGE? Our information!

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About Thomas Wachsmuth

Thomas Wachsmuth - He has been an integral part of tuningblog.eu since 2013. His passion for cars is so intense that he invests every available penny in them. While he dreams of a BMW E31 850CSI and a Hennessey 6x6 Ford F-150, he currently drives a rather inconspicuous BMW 540i (G31/LCI). His collection of books, magazines and brochures on the subject of car tuning has now reached such proportions that he himself has become a walking reference work for the tuning scene.  More about Thomas

a comment

  1. Our oil separator on the car is probably broken. So it's good to know what they actually do. A separation of oil mist and air seems to be important.

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