Skip the auto shop - Our mechanics make house calls

Q: Second cracked exhaust manifold with rumbling sound

asked by on

I already have another cracked exhaust manifold. This is the 2nd one that has cracked since I bought it. The first time it happened, it was a small crack which also had a ticking sound. The current crack is larger and makes a rumbling sound, which causes my engine to sound very powerful. My repair shop told me the crack is so small that I shouldn’t be concerned about it causing any damage to the engine. Also, I live in an area where we never have cold weather. So I just endure the rumbling, but when I have clients with me in the car, it can be annoying to them. Can you give me advice as to how to fix this problem?

A: Hi. We will be happy to assist you with you...

Hi. We will be happy to assist you with your 2003 Infiniti M45. I believe it would be best to replace the cracked exhaust manifold. Your vehicle has two exhaust manifolds. It's likely that the one you replaced cracked before the other and now the second manifold is cracked and leaking, which is the noise you are hearing. Replacing the second manifold should resolve your problem. Have the condition of both exhaust manifold gaskets checked as well. If you want to have this verified, a certified technician from YourMechanic can come to your car's location to diagnose the noise you are making.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: What is the evaporative emissions control system?

Gasoline evaporates, even in the gas tank of your Accord. If those fumes are allowed to escape into the atmosphere, they create hydrocarbons that damage the environment and also contribute to smog/air pollution. To help combat this problem, your car...

Q: Dashboard blistering

Hi. The only way to repair a blistering dash board is to replace it. Alternately, you could push a dash board cover over it to hide the cracks. Covers such as these are sold online and at auto parts stores....

Q: cost of maniverter

Depending on the engine you have this price would be pretty close if both of them are being replaced. If this is for only one then it is high. You can get each manivertor online for less than $500 each...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...