Top Chevrolet S10 Exhaust Manifold Problems and the Reasons behind Them
Your Chevrolet S10 truck is equipped with a reliable exhaust system, which prevents your vehicle from becoming a notorious pollutant. The exhaust system's emissions cleaning process starts with the exhaust manifold. It is the receiving area for spent fuel and air that come from your truck's engine block before they are transported to the catalytic converter for conversion. Although it is made from the toughest cast iron material, your Chevrolet S10 exhaust manifold's rigorous job and its regular exposure to extremely high temperature makes it susceptible to immediate wear and tear. Here are some of the most common symptoms of exhaust manifold failure and the reasons behind them:
Foul exhaust odor
If you smell a strong odor of raw gasoline inside your Chevy S10 truck's cabin even if the windows are all rolled up, your exhaust manifold is probably leaking. When your exhaust manifold has a leakage problem, a portion of the fuel and air that is released by the engine escapes through the cracks and seeps through the interior of the vehicle. The scent is also especially strong outside the vehicle near the engine bay as well as the areas surrounding the exhaust manifold. This particular symptom is easier to detect during the cold months when the vents are open for hot air and the windows are closed. In some cases, welding the exhaust manifold can still solve this problem. But for cracks that are beyond repair, replacement is the only solution.
Cracks or leaks in your exhaust manifold can produce loud banging or popping noises everytime the cylinder fires. Tapping, ticking, and rattling noises may also indicate a broken exhaust manifold. These noises are especially noticeable when the engine is cold or when the vehicle is in idle mode. Sometimes, these noises may also be a sign of an engine knock. To make sure that it is a case of an exhaust manifold trouble, wait for the slight hiss that follows the popping or tapping noise. Another type of sound you need to watch out for is the thunderous buzzing noise produced by the exhaust manifold. Once you hear this, it means that your gasket is lost or the exhaust manifold is detached from the engine or the rest of the exhaust system. When this happens, immediate replacement and repair are in order.
Other troubleshooting tips
Excessive shaking is another indication that your exhaust manifold already reached the end of its service life. Other symptoms include low fuel efficiency, power loss, and emissions test failure. You may also want to check the surface of your exhaust manifold and the gasket for physical damage.