Most Common Acura Integra Exhaust Valve Problems
An automobile's exhaust valve works inside the cylinder heads to allow fumes to exit the chamber. In this process, it turns extremely hot, reaching around 1200 to 1350 degrees Fahrenheit. And even though it is made of sturdy alloy material, it can still have a number of problems. Here are the most common problems with an Acura Integra exhaust valve:
Sticking exhaust valve
Have an assistant rev up your engine while you observe the exhaust valve, which is mounted on the exhaust manifold. Observe the plunger mechanism to see if it is moving up and down freely. If it doesn't the valve is sticking and must be cleaned right away.
Leaky exhaust gasket
When the exhaust gasket is leaky, it causes the valve to burn at high speeds and temperatures. This, in turn, will cause the engine to misfire at low speeds because it loses power. You will feel a jerking action while driving.
No compression on cylinder
The engine works effectively and efficiently when all the cylinders have compression. If any of your vehicle's cylinders does not have any compression, the exhaust valve is most likely burnt out. This will cause the engine to run slower and be more susceptible to damage. To check cylinder compression, use a compression gauge or an engine analyzer.
Irregular exhaust emissions
Another common problem with the exhaust valve is having smelly, black smoke coming from the exhaust pipe. Sometimes, you can even smell the odor of rotten eggs. This happens when the exhaust valve is totally burnt out because it allows raw fuel to enter the exhaust system. This raw fuel partially burns and leaves sooty residue inside the pipes and especially the catalytic converter. To solve this problem, you may need to replace the two manifold gaskets, oxygen sensor, plugs, and wires.
Broken exhaust valve
An exhaust valve can break either at the head or the stem. The valve may break at the head because of the stretching that is caused by the constant heat and sudden drops in temperature. When it breaks at the stem, it may be caused by heavy wear in the keeper grooves, allowing the stem to snap off. This also results when the stem height hasn't been properly installed.