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Exhaust Valve Control
Exhaust Valve Control
Post: Exhaust Valve Control – How to Control Your Exhaust Valves

Exhaust Valve Control – How to Control Your Exhaust Valves


Your exhaust valve control is an essential component of your car’s engine and regulates the flow of exhaust gases from the cylinders. If your exhaust valve is not working correctly, it can cause several problems, including loss of power, increased fuel consumption, and excessive noise.

To keep your exhaust valve in good working order, it is essential to check and adjust it regularly. This process is not complicated but requires knowledge about your engine’s workings. Here are a few tips on how to control your exhaust valves:

  1. Check your owner’s manual. This should be your first port of call when attempting any kind of engine maintenance, as it will contain specific instructions on how to check and adjust your particular car model.
  2. Identify the problem. Before you can start adjusting your exhaust valve, you need to figure out what the problem is. Several things can go wrong with an exhaust valve, so it is essential to narrow down the possibilities. Common problems include a sticking valve, an improperly sealed valve, or an obstruction in the valve itself.
  3. Adjust the idle speed screw. If you think the problem with your exhaust valve lies in its sealing, then you can try adjusting the idle speed screw. This screw controls how far the valve opens when the engine is idling. Turning the screw clockwise will open the valve further while turning it counterclockwise will close it slightly.
  4. Adjust the mixture screws. If you think the problem lies in how the mixture screws are set, you can try readjusting them. The mixture screws control the fuel and air that enters the cylinders. Turning them clockwise will decrease the fuel entering the cylinder while turning them counterclockwise will increase it.


What is Exhaust Valve Control?

An exhaust valve in an internal combustion engine opens to allow burnt gases from the engine cylinder to be expelled. The intake and exhaust valve control are opened and closed by the camshaft, which is rotated by the crankshaft via a timing belt or chain.

The exhaust valve is opened slightly before the piston reaches Top Dead Center (TDC) on its compression stroke. This gives the burnt gases enough time to be expelled from the cylinder before the fresh air/fuel mixture is drawn in on the intake stroke.

One complete turn of the crankshaft will open and close each valve twice — once for the intake stroke and once for the exhaust stroke. Most engines have two valves per cylinder: one intake and one exhaust valve.


How to Control Exhaust Valves

Exhaust valves are essential to the car’s engine and must be controlled to keep the engine running correctly. There are a few different ways to exhaust valve control, each with advantages and disadvantages. Let’s take a look at the most common methods.


Exhaust Valve Control – Adjust the Valve Lash

The most important thing you can do to keep your exhaust valves closing tightly is to adjust the valve lash regularly. The valve lash is the clearance between the tip of the valve rocker arm and the valve stem. The valves will not sit properly and leak if the lash is too tight. If the lash is too loose, the valves will rattle and may not close tightly, resulting in a loss of power.

To adjust the valve lash, you will need a feeler gauge and a wrench that fits the nut on the end of the pushrod. First, remove the spark plug from the cylinder you will be working on. This will make it easier to turn the engine over by hand. Next, locate the pushrod for the exhaust valve you will adjust. The pushrod will be located under a cover on top of the rocker’s arm.

Using your feeler gauge, measure the clearance between the tip of the pushrod and the valve stem. Use your wrench to turn the adjustment nut on the pushrod to increase or decrease the clearance. Once you have set the correct clearance, replace the cover over the pushrod and adjust the other exhaust valve control.


Adjust the Rocker Arms

If your engine is idling too high, one possible cause is that the exhaust valves are not closing all the way. To fix this, you will need to adjust the rocker’s arms. This is a relatively simple process but requires a few tools.

First, you will need to locate the rocker’s arms. They are usually located near the top of the engine, on either side. Once you have found them, you need to loosen the bolts that hold them. Be careful not to remove the bolts entirely, as you will need to put them back in place once you have adjusted the rocker’s arms.

Next, use a wrench to turn the adjusting screws on the rocker’s arms until they are tight. Ensure you do not overtighten them, as this can damage the engine. Once you have tightened the adjusting screws, you can replace the bolts and start up the engine to see if the problem has been fixed.


Adjust the Valves Themselves

You’ll need to learn how to control your exhaust valves to get the most power out of your engine. You can do this by adjusting the valves themselves or by installing an aftermarket controller.

The easiest way to adjust your exhaust valves is to turn them with a screwdriver simply:

  1. Locators that hold the valve in place.
  2. Use a 
  3. Users turn the screw clockwise or counterclockwise until the valve is loose.
  4. Rotate the v
  5. Rotate is in the desired position.
  6. Tighten the screw 
  7. Tighten in place.
  8. You can install an aftermarket

Et controller if you want more control over your exhaust valves. These controllers allow you to adjust the timing and duration of the exhaust pulse, which can significantly increase performance and power.


Exhaust Valve Control – Conclusion

We hope this guide has helped you understand how to control your intake and exhaust valves control. We encourage you to experiment with different settings to find what works best for you and your car. Remember, there is no perfect way to do things, so don’t be afraid to try something new. And as always, if you have any questions, feel free to reach out to us on our forums or social media.