Symptoms of a Bad or Failing Exhaust Manifold

Our certified mechanics come to you · 12-month, 12,000-mile warranty

GET A QUOTE Get a fair and transparent estimate upfront
Red-stars EXCELLENT RATING ON

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
2004 Kia Spectra $944 $853.21 $91.00 4% $992.96
2007 GMC Sierra 1500 HD Classic $254 $128.26 $126.00 20% $321.76
2003 Mitsubishi Montero Sport $712 $501.95 $210.00 13% $824.45
2005 Mercedes-Benz SL500 $827 $407.16 $420.00 21% $1052.16
2007 Acura RDX $861 $363.63 $497.00 23% $1126.88
2013 Audi S7 $2985 $2704.80 $280.00 4% $3134.80
GET A QUOTE FOR YOUR CAR Get a fair and transparent estimate upfront

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.

engines
exhaust system

Fast and easy Exhaust Manifold Repair service at your home or office.

GET A QUOTE FOR YOUR CAR
Get a fair and transparent estimate upfront

Recent Exhaust Manifold Repair reviews

Excellent Rating


YourMechanic Exhaust Manifold Repair Service

Average Rating

4.4/5

Number of Reviews

96

Rating Summary
86
7
0
0
3
86
7
0
0
3

Scott

31 years of experience
206 reviews
Scott
31 years of experience
Car runs great, and is so quiet, my brother who is a mechanic said it sounds like a new car.
2009 NISSAN ALTIMA - EXHAUST MANIFOLD - DENVER, COLORADO

Russell

24 years of experience
145 reviews
Russell
24 years of experience
Russell was an excellent and very professional / knowledgeable mechanic. Will recommend strongly.
2006 TOYOTA MATRIX - EXHAUST MANIFOLD - WALNUT CREEK, CALIFORNIA

CESAR

12 years of experience
20 reviews
CESAR
12 years of experience
Ceasar did an amazing job. Because of him I definitely refer friends and family to your company. Ceasar was did a great job and glad we had him as our mechanic.
2008 NISSAN ALTIMA - EXHAUST MANIFOLD - SACRAMENTO, CALIFORNIA

Richard

8 years of experience
246 reviews
Richard
8 years of experience
Great guy, great work!
2008 CHEVROLET TRAILBLAZER - EXHAUST MANIFOLD - NASHVILLE, TENNESSEE

More related articles

Symptoms of a Bad or Failing Flexible Clutch Hose
Common signs include difficulty shifting, low clutch fluid, and feeling no resistance at the clutch pedal.
How to Find the Keyless Code on a Ford Explorer or Mercury Mountaineer
Many Ford Explorers and Mercury Mountaineers were manufactured with an option known as the Ford keyless entry keypad. Some models refer to it as SecuriCode as well. It...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...

Related questions

Q: Manual transmission and power surging

Hello! Thank you for writing in with this question. This concern is likely related to the Throttle Position Sensor (TPS). If the TPS is faulty, it sends an incorrect signal to the vehicle’s computer system, which can result in surging...

Q: Why Is it so Important That a Car Passes Emissions Testing?

Emissions testing provides several very useful functions for our daily lives. The combustion gases that come out of the tailpipes of our vehicles are comprised of carbon monoxide (CO), hydrocarbons (HC), oxides of nitrogen (NOx), carbon dioxide (CO2), and oxygen...

Q: How Long Does an Engine Usually Last?

How long an engine lasts requires a long list of variables to consider before a time frame or mileage can be given. I have seen engines last less than 40,000 miles and others that lasted more than 300,000 miles. When...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1-800-701-6230 · hi@yourmechanic.com