Skip the auto shop - Our mechanics make house calls

Q: Loud rattling noise

asked by on

Just got a rebuilt motor put into my car because of shot head gasket. now there is this loud rattling noise coming from the passenger side of the car when the car is still. The noise stops once you accelerate the car... not sure what the problem is.
My car's transmission is automatic I believe.

Changing an engine is a big job that involves many little details, and sometimes all of the details don’t get completely ironed out. It could be that one or more of the exhaust heat shields was not put back in place just right. It probably rattles at idle because four cylinder engines are just shakier at idle, and then they smooth out when they speed up. Try reaching under the car with the heel of your hand and banging on the exhaust system. If you hear the same sound that has you worried, then you’re on the right track. This type of issue can be difficult to diagnose, so if you need assistance, a YourMechanic certified technician can come to your location to inspect your vehicle’s rattling noise and help make any repairs.

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. Loud rattling noise

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: Where are the grocery hooks located and how do you use them?

Ever go to the grocery store, load up your trunk, arrive home and find that your bags have spilled and your food is now all over the place? Your car has grocery hooks to help prevent this from happening. They’re...

Q: Car rattle noise in the middle of console - 2006 Chrysler 300

Hey there. I recommend having an expert drive the vehicle to verify the noise so the noise can be isolated to an engine or transaxle problem. With the symptoms you describe, a rattle that only happens over 40 mph may...

Q: Car jerks makes noise and runs at a slow speed while driving

Check to see if the air filter and housing tubes are all hooked up and not cracked going to throttle body. Have the computer system codes checked to see what codes are stored and then have the codes pinpoint tested...

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...
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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.