What is PCV?

by yaww

Positive Crank Case Ventilation is an emissions developed in the 1960s that efficiently ventilate the oil carat and engine block, while also burning the toxic gases that will spread to the environment on the engine, providing little power and protecting the environment System. I suggest you do the PCV conversion to your older model engines, even if it's not an EFI system. My recipes are for 55-57 V8 engines but you won't have any trouble finding what's mentioned on other engines

Road Draft Tube

In the combustions that occur while the engine is running, some of the waste and hot gases escape the rings and create pressure on the oil carve. These gases should be discharged from the motor's block in order not to damage the engine and to prevent the oil from distorting the chemical properties. The engines we're talking about are 31 mm behind the block, next to the distributor. There is a ventilation hose attached to a hole in diameter (Road Draft Tube), the hose continues on the shunt side from behind and ends there with the tip open. When you reach a certain speed with the car, the minus pressure at the end of the hose creates an outward airflow and ventilates the engine car. The ventilation cover (also the oil filling cap) that provides fresh air to the engine is at the front of the engine block. But:

– As a result of the efficient discharge of burnt and toxic gases from the sump, your oil loses its property in a very short time, it is necessary to change
– Due to oil vapor, oil is transmitted to the road and sherzumana becomes polluting
– You give flammable and toxic gases into the atmosphere, the flammable oil vapor you pay for will be wasted
– When the car is not cruising, there is no efficient ventilation, the vapours come out of the front ventilation cover and make the smell of oil in the car


Above you can see the flow of Road Draft Tube and PCV systems. So as a result, you have to go back to PCV.

How does PCV work?


It is a valve with a string mechanism in pcv. One end of the carburetor (or PCV input in EFI) is connected to the gas butterfly under the gas butterfly or attached to the vacuum in the frog, while one end is connected to the valve cover. In a idling vehicle (the engine vacuum under it is a lot because the gas butterfly is closed), using the vacuum under the butterfly disrupts the balance of the vehicle. The PCV has a pressure system that works upside down inside, the PCV valve shuts off when the vacuum is multiply and the ventilation is reduced. However, when the gas butterfly is opened, the vacuum decreases and the valve is opened thoroughly, increasing air passage. This means that poison gases from the carve are absorbed and given to the engine and burned again. Since the air we absorb must enter the engine from one place, the other valve has an air lift cover (breasher). In addition, the protection mechanism inside of the sudden reverse pressures (in cases where the carburetor comes on fire) closes and prevents the carat from igniting. Do not bother cleaning pcv you will not succeed. Change it at 10,000 km. You can tell if it works, shake it, and when it shakes it, it needs to click the part inside.


What are we going to do?

One PCV valve and hose are coming out of our set. We're going to dismantle the Road Draft Tube and put a rubber seal on the 31 mm hole that will lower it to the PCV valve thickness. Then we will attach the PCV here with a tight ness that will not come out (don't miss anything inside), and we'll connect the other end to the PCV entry in the EFI system. We don't have a new future frog (manifold) oil filling pipe (also an air-taking pipe), so we're going to remove the other valve cover (make sure not to damage the seal when you remove it, and if it's damaged, get a new one) and

Alternative 1 – Drilling a hole of about 1.5-2 cm, leaving no share in the same thickness, and 2 cm outside. We will boil a metal pipe that will be in length. Likewise, we will make a similar link there by drilling under the air filter (on the side where the air is dust-free). Then we'll connect the two connections with a hose.

ALternative 2 – We're going to get a vent door with a heat filter and we're going to drill and connect the hole accordingly (I chose this because I don't want any extra black ugly hoses on my engine)

As a result, with the first connection we make, we absorb the gases in the engine itself and get fresh air with the second connection. We'll also fill the engine oil from the valve cover with the help of a funnel.

In the following example, you can also see the introduction to the Road Draft Tube on the left side of the 6-cylinder engines, and the suction manify.


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