Valve cover: flow and Troubleshooting

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2018-03-21 00:36:12

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In the process of machine operation, motorists have to face different problems with his car. One such leak is the valve cover. About why it occurs and how to fix it, will talk in this article.

The Valve cover and gasket

Any driver who has seen what is under the hood of his car, aware of the location of the valve cover. It protects the mechanism, locking it from outside influence. It also provides protection from oil leakage. Element attached to the cylinder head through bolts and special gaskets cut to the shape of the head and cap.

valve cover

It depends on a sufficient tightness. On unsatisfactory condition of said strip resulting oil leak. In this case, you will need to be replaced.

However, before proceeding to the repair, you need to understand the reasons that led to depressurization of the part, as otherwise the seal will have to change again and again.

Oil from under valve cover

The Cause of any leaking lubricating fluid, from which the connection elements of the motor it may happen, basically, is the poor ventilation of the crankcase. It can be not only a valve cover, and fuel pump, and distributor, and more.

During the operation of any piston is pulled out part of the exhaust gases through the seal they seep into the crankcase of the motor. If the power unit is new, the amount of seeped gases will be minimal. But with good mileage of exhaust gases in the crankcase typed a lot, and eventually formed the excess pressure flows to the valve cover. To reduce it, a new car, there is an additional ventilation system designed specifically for the Carter motor.flowing valve cover

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Crankcase Ventilation

Diesel powertrains equipped with two types of ventilation: for idling and for high engine speeds. Both systems consist of rubber tubes, through which the gases sucked into the intake manifold. Such a valve closes the system at idle. If it will not function, it will cause the formation of a very poor mixture in the intake manifold. As a result, the motor will start to shake, or worse, stall.

In order to Gaza, Carter took off with the oil dust in the valve cover mounted oil separator. It can become clogged with carbon and not work. Then the oil gets into the intake manifold through the filter, causing, of course, the smoke of the engine.

oil from under the valve cover

The Engine provided with the injection, has a single pipe suction gas, but closer to the throttle channel is divided into two. One that has a larger diameter, enters the manifold up to the valve, and smaller, which is usually clogged with slag, after it. Through this channel of smaller diameter is implemented ventilation at idle, and through the second — when the shutter is open. If the channels are dirty and the ventilation is not performed, and the exhaust form the engine is so strong overpressure that can not withstand any gaskets or oil seal. That's why the blow-by gases begin to flow out.

If you have found that is flowing the valve cover, before you attempt to repair the damage, you must fix the ventilation system so that even at a thousand revs a piece of cardboard on the valve cover would tightly cling to her. After all, when worn mechanism will not be able to get even at two thousand rpm, because the exhaust will break into the crankcase, and the oil leak will continue again and again.

Rinsing cap

When it detects that the valve cover is sweating, take it off and wash and gasket change. You may be surprised at the result. Do not forget about lubrication washers and bolts, by which is secured a valve cover. When washing you need to try to wash the oil separator below the mesh in it at least slightly clean. Setting the lid back on and tightening the screws, be careful not to disrupt the thread and not to crush the item.

valve cover Opel Astra g

16V

On the other hand, if you constantly maintain the oil level regularly adding it, leaks oil from under the valve cover there is nothing to worry. But with the 16V motor, mounted, for example, “the Lacetti” in which the candles are located in recesses, the condition can result in the failure of the ignition system. Therefore, valve cover “the Lacetti” in this case needs to be removed and the leak is fixed be sure.

Replacement pads

To replace the pads, you need to think in advance about the availability of all components, i.e. new constructions Hermetica and degreaser.

The Replacement is done on a cold motor, not to get burns and injuries due to hot parts.

The Procedure is as follows:

  1. A Car driven into a garage or on a level ground, open the bonnet.
  2. Remove the filter cover and Unscrew the bolts.
  3. Remove the remaining fasteners and the cover from the cylinder head.
  4. Connection of the elements is cleaned of the existing sealant and degrease.
  5. Handle new item sealingtool and do the installation in reverse order.

valve cover Lacetti

After the replacement, the head should be cleaned and start the motor. Upon detecting the leak immediately, most likely a gasket or sealant was of poor quality or the installation was in incorrect order.

In Order to avoid negative consequences, all parts, including valve cover “Opel Astra” G, on which is installed the aforementioned engine 16V, gaskets, sealants and everything else should be purchased in trustworthy stores selling auto parts.


Article in other languages:

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BE: https://www.tostpost.com/be/a-tamab-l/19341-zatamkavaya-vechka-cyachy-yae-l-kv-dacyyu.html

DE: https://www.tostpost.com/de/autos/19352-ventildeckel-flie-en-und-fehlerbehebung.html

ES: https://www.tostpost.com/es/coches/19363-de-v-lvula-tapa-el-fluir-y-la-soluci-n-de.html

HI: https://www.tostpost.com/hi/cars/10794-valve-cover-flow-and-troubleshooting.html

JA: https://www.tostpost.com/ja/cars/10795-valve-cover-flow-and-troubleshooting.html

KK: https://www.tostpost.com/kk/avtomobil-der/19341-klapandy-a-pa-a-u-zh-ne-ony-zhoyu.html

PL: https://www.tostpost.com/pl/samochody/19300-pokrywa-zawor-w-nieszczelno-i-j-rozwi-zywanie.html

PT: https://www.tostpost.com/pt/carros/19303-funcionamento-da-v-lvula-tampa-fluir-e-sua-resolu-o.html

TR: https://www.tostpost.com/tr/arabalar/19345-valf-kapak-ak-ve-onu-sorun.html

UK: https://www.tostpost.com/uk/avtomob-l/19332-klapanna-krishka-tekti-usunennya.html

ZH: https://www.tostpost.com/zh/cars/11591-valve-cover-flow-and-troubleshooting.html






Alin Trodden - author of the article, editor
"Hi, I'm Alin Trodden. I write texts, read books, and look for impressions. And I'm not bad at telling you about it. I am always happy to participate in interesting projects."

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