Q: Rattling on startup

asked by on

I have a high-mileage van with around 250,000 miles on it. There is a loud rattling noise when I start it up. When it is under load, the noise seems to disappear. I had the belts removed as I thought it might be causing the noise, but it still can be heard. What could it be?

Thanks for writing in about your 2000 Voyager Plymouth. You may have problems with your exhaust catalyst rattling inside the exhaust. When the substrate starts to break up inside, they will rattle inside the housings. As the exhaust heats up, they may stop rattling but as time goes by, the rattle can get worse as they break up in the converter housing. Have someone inspect the noise and verify that they need to be replaced.

Was this answer helpful?
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. Rattling on startup

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: Oil in the water

If you open the oil cap and see a white moisture on the top of it, you may have a head gasket cracked. A block test should be performed to verify a head gasket crack. If you would like to...

Q: White smoke coming out of car

Hello. Depending on what the smoke looks like and also depending on what fluids you are losing would help me to determine the problem. If the smoke has a blue cast to it then it may be burning oil. If...

Q: Noise when I accelerate and turn right.

Hi there, It sounds like you have a failing constant velocity (CV) joint on one of the front axle shafts. When CV joints fail, they often make a loud clicking or grinding type noise, which could be interpreted as a...

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...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.