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?

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
  1. Home
  2. Questions
  3. Second cracked exhaust manifold with rumbling sound

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Can an automobile’s coolant system malfunction if a EWS Control unit is calibrated wrong?

Hi Bob. The EWS control unit is a security system, which to my knowledge has no relation or impact on the cooling system. The only thing that could impact the cooling system would be if for some reason the coolant...

Q: The pipe that goes from my catalytic converter and connects to my mufflers is rusted off. What is that pipe called ?

Hello, the pipe between the catalytic convertor and muffler is called an intermediate pipe. You may need to replace the mufflers if that connection is also rusted. If you'd like, a certified Your Mechanic Technician can come to your location...

Q: My car is accelerating on its own.

Inasmuch as you are writing in about uncommanded (aka, "unintended") acceleration, I can tell you the National Highway Traffic Safety Administration, one of the Federal agencies that tracks vehicle defects, would love to hear from you. You can file an...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...