Before getting into how to tell if your Subaru has an exhaust problem, we should first delve into the components that comprise that make up that system. The Subaru exhaust system starts at the manifold that is connected by bolts and a gasket to the engine. At the end of the manifold are collector gaskets that will attach exhaust tubing that will route away from the engine bay and out the back end of the car. Between the collector gaskets and tailpipes, your Subaru may contain a muffler(s), catalytic converter(s), or possibly a resonator. These three items are what dampen the sound of the exhaust as well as filtering the exhaust gases to make fewer emissions.
All of these components work together to remove waste gases from under the hood and allow the engine to exhale, so to speak. The exhaust system will also contain sensors that feed information back to the car’s computer to tell it how much fuel to use, and if the system is operating correctly.
The most notable way to identify if you have an exhaust problem is to listen. Leaks are the most common issue exhaust systems are susceptible to. Holes can develop at any point and are likely to happen due to age and vulnerable places where rust is present. Gasket failure can also cause an exhaust leak which will make a whistling sound when the engine is revved to higher RPM’s. At times it can be difficult for someone that isn’t trained in automotive diagnostics to locate the source of the leak. Even the smallest hole or leak in the tubing or mufflers can cause problems for how the exhaust system works. More massive holes or gaps will produce louder sounds. While you may think that it is alright to drive a car making these noises they can be harmful to the engine and affect its performance.
Muffler and exhaust service can fix rough idle issues and poor fuel economy. M45 Automotive can identify any problem throughout the system and make repairs or replacements as needed. Muffler repair can include welding areas in the muffler that have developed a hole. This is only beneficial if the inside of the muffler is still in excellent condition. If the muffler can’t be repaired, it may need to be replaced with a new one.
A faulty oxygen sensor can throw the exhaust system entirely out of whack. These tiny sensors, if not working, will illuminate the check engine light on the dash alerting you there is an issue. While having a check engine light on is not great and can inspire worry. A quick check with a code reader from a technician at M45 Automotive can identify the problem with high certainty.
If your Subaru is experiencing loud noises or whistle sounds, particularly when accelerating, or if the idle is rougher than usual, this may indicate an exhaust issue that should be checked out. Having matters repaired with exhaust services can stop the noisy leaks, improve fuel economy and give your Subaru back performance it may have lost.