Symptoms of a Bad or Failing Exhaust Manifold

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Cost of Replacing a Bad or Failing Exhaust Manifold

If the exhaust is excessively loud, there are engine performance issues, or the engine bay smells burnt, you may need to replace the exhaust manifold. Our certified technicians can come to you and diagnose the problem. You will receive a $30 credit towards any follow-up repairs that result from the diagnostic. Following are example prices for Exhaust Manifold Repair. Click on the button below to get an upfront quote for your car.

Cars Estimate Parts Cost Labor Cost Savings Average Dealer Price
2010 Mitsubishi Outlander $501 $242.20 $259.00 21% $639.95
2004 Volvo C70 $591 $345.90 $245.00 18% $722.15
2014 Volkswagen CC $449 $147.58 $301.00 26% $609.83
2007 Land Rover LR3 $361 $235.06 $126.00 15% $428.56
2010 Lincoln Navigator $598 $136.48 $462.00 29% $845.98
2007 Chevrolet Corvette $364 $182.38 $182.00 21% $461.88
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How to Diagnose a Bad or Failing Exhaust Manifold?

exhaust manifold

Exhaust manifolds are an engine component that is found on all internal combustion engines. Exhaust manifolds are usually made of cast iron or stamped steel and are designed to collect exhaust gases from the engine cylinders and transport them into the exhaust pipes for expulsion. The exhaust manifold is attached to the engine cylinder heads and has ports that collect exhaust gases from each individual engine cylinder. Cast iron manifolds are usually one piece, while stamped steel ones are usually welded together. Both are designed to withstand the high stress and heat conditions required to trap and transport exhaust gases. While they are heavy duty in nature, they can still be prone to issues, and can cause problems with drivability when they have a problem. Usually a bad or failing exhaust manifold will produce a few symptoms that can alert the driver of a potential issue.

1. Noisy engine exhaust

One of the first symptoms of a problem with the engine exhaust manifold is an excessively loud exhaust. If the exhaust manifold cracks, breaks, or leaks, it can cause an exhaust leak that will lead to a noisy exhaust. The vehicle may produce a hissing or tapping sound from the engine bay that may get louder when the engine is accelerated.

2. Decreased power, acceleration, and fuel efficiency

Engine performance issues are another symptom that can be caused by a problematic exhaust manifold. If the exhaust manifold cracks or leaks, it can cause an exhaust leak that can negatively affect engine performance. An exhaust leak can cause the vehicle to experience a reduction in power, acceleration, and even fuel efficiency.

3. Burning smell from the engine bay

Another symptom of a problem with the exhaust manifold is a burning smell from the engine bay. If the exhaust manifold has any issue with the heat shield or exhaust leaks the excess heat can cause damage to nearby electrical and plastic components. Exhaust manifolds can reach temperatures in excess of nine hundred degrees Fahrenheit which can cause any nearby or contacted components to burn up. Burnt components may produce a plastic burning smell that is sometimes accompanied by smoke and can lead to other issues so any burning smells should be checked out to make sure that they are not a major issue.

While exhaust manifolds are usually built to be heavy duty to enjoy a long service life, they can still be prone to issues simply due to the high stress conditions they are constantly under. If you suspect that your vehicle’s exhaust manifold may be having an issue, have the vehicle inspected by a professional technician, such as one from YourMechanic, to determine if the vehicle will need an exhaust manifold replacement.

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Recent Exhaust Manifold Repair reviews

Excellent Rating


YourMechanic Exhaust Manifold Repair Service

Average Rating

4.8/5

Number of Reviews

86

Rating Summary
76
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3
76
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3

Cesar

6 years of experience
162 reviews
Cesar
6 years of experience
Arrived on time, did a very difficult job quite well in less time than was estimated. By buying my own parts online and having YourMechanic install them literally saved me thousands.
2009 BMW 328I - EXHAUST MANIFOLD - ISSAQUAH, WASHINGTON

Tabitha

14 years of experience
48 reviews
Tabitha
14 years of experience
Professional attitude,job was done in good time. Much better than going to the auto shop and less expensive. You’re able to relax in the comfort of your home while the job is done..Highly recommended .
2001 FORD MUSTANG - EXHAUST MANIFOLD - SPRING VALLEY, CALIFORNIA

Brian

21 years of experience
29 reviews
Brian
21 years of experience
I had a great experience. The mechanic was early. He went right to work. When finished, he showed me the damaged parts, explained what was done, and answered all of my questions. He even gave me a reference to another mechanic that does welding that he doesn't do. Price was great and I wasn't charged until the work was complete
2009 SATURN AURA - EXHAUST MANIFOLD - KEYMAR, MARYLAND

Joseph

17 years of experience
238 reviews
Joseph
17 years of experience
Joseph was on time and really helpful. He found an issue with the oxygen sensor when replacing the exhaust manifold and, even though it caused him to be late for his next appointment, he still picked up a new one and only charged me for the cost of the part.
2010 CHEVROLET MALIBU - EXHAUST MANIFOLD - SALT LAKE CITY, UTAH

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