Q: Car rattles after starting

asked by on

My car starts with a rattling sound, but then it goes away after driven a bit.

Hi. It’s difficult for me to say without hearing the noise firsthand, but there are a couple things that come to mind. The first is the hydraulic valve lash adjusters. The lash adjusters use oil pressure to keep the lash between the rocker arm and valve at a constant rate. When the engine is cold, it sometimes takes oil awhile to reach the adjusters. As a result, you have a rattling or tapping noise when the engine is cold. This is a common problem with the vehicle you have. The second thing that comes to mind is an exhaust leak at the manifold. This is more noticeable when the engine is cold and often goes away as the engine warms up. This is because the exhaust manifold metal expands. My best advice is to have a trained mechanic, such as one from YourMechanic, listen to your vehicle’s noise.

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. Car rattles after starting

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: Glitter like flakes in radiator

Hi There, Unfortunately, this may be a couple of potential issues. This could be leftover remnants of a stop leak fluid that may have been put in the radiator at some point. Additionally, it may be small particles of potentially...

Q: Q: Car vibrates at Idle when AC is turned on

Hi there. Typically when the AC compressor is cycling, it will draw more power from the engine, which might make an existing rough idling engine "feel" worse. This could be caused by fuel system components like mass air flow sensor,...

Q: My vehicle occasionally heats up and blows cold air out of the heater vents.

If you are getting the heater to work sometimes and other times not then it is due to the engine cooling system has air in it. You should have the cooling system purged of air and then retest system. As...

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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
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.