Fuel combustion makes power production possible for the engine. The process of burning the air-fuel mixture, however, also creates harmful by-products: toxic exhaust gases. These gases need to get out of your vehicle; otherwise, the engine can't function as efficiently as possible.The exhaust valve forces out these gases out of the cylinders and directs them into the exhaust manifold. Any valve malfunction can trap the exhaust fumes in the cylinders, which means the engine needs to work doubly hard to expel them, and this results in the loss of engine power.The gases could also cause vital engine parts to corrode and incur damage eventually. So make it a habit to check the exhaust valve regularly. Replace defective valves as soon as you can. It won't be an easy job, but it'll spare you dozens of more serious problems. Quality replacement exhaust valves are available at Carparts.
• Helps the engine expel harmful exhaust gases
• Directs exhaust gases out of the cylinders and into the exhaust manifold
• Resilient against extreme heat and pressure
Fixing a Stuck Exhaust Valve and Getting Through Morning Sickness
Morning sickness isn't just for pregnant women; it's also experienced by vehicles with a stuck exhaust valve. You see, when the engine is cold, the clearance between the valve's stem and guide is at a bare minimum. So, the first sign of a stuck exhaust valve, which is intermittent hesitation or miss in engine speed, is usually observed in the morning when the engine is first started. As soon as you notice such symptom, help your ride get through it by fixing its stuck exhaust valve.
Difficulty level: Easy
What you'll need:
- Carburetor cleaner
- Flathead screwdriver
- Socket wrench
- Wire brush
Step 1: Park your vehicle on a level ground, turn the engine off, and engage the emergency brake. Allow the vehicle to cool until its components are cool enough to touch.
Step 2: Open the hood and find your way to the exhaust valve, which is usually mounted on the exhaust manifold. Consult your vehicle's manual to know the valve's looks and location.
Step 3: Have someone rev the engine while you're observing the exhaust valve. The plunger mechanism must freely move up and down; if it doesn't, then it's time to clean your sticking valve. Turn the engine off and allow the engine and exhaust components to cool down completely.
Step 4: Disconnect the vacuum hose from the exhaust valve so that you can gain access to the bolts holding the valve in place. With a flathead screwdriver, unscrew the hose clamp, slide it up the hose, and gently take the hose off the valve.
Step 5: Using a socket wrench, loosen and remove the screws that secure the exhaust valve in place. Set the screws aside; you'll need them as you reinstall the exhaust valve. Remove the valve from the manifold.
Step 6: Pour the carburetor cleaner into a bowl and soak the valve for ten minutes. Take the valve out of the bowl and spray additional carburetor cleaner into the valve plunger mechanism. Give the cleaner time to penetrate the stuck grime.
Step 7: Clean the valve using a rag and wire brush, paying more attention to the plunger mechanism to remove all carbon and grime. Continue cleaning until the plunger is now able to smoothly move up and down. Rinse the valve with warm water and allow it to air dry completely.
Step 8: Put the exhaust valve back in place. Mount it on the exhaust manifold and put every screw back. Use the socket wrench to tighten the screws. Connect the vacuum hose into the valve and secure the connection with the hose clamp. Tighten the clamp with a flathead screwdriver and close the hood.
Dealing with a stuck exhaust valve is easy, but the task may last for a couple of hours or even days, depending on how easy or hard it is to clean the plunger mechanism and make it work seamlessly once again.