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: Q: Fuel injecter circuit open

Hi Danny. Thanks for the question today. When a fuel injector circuit is open, it means that the fuel injector or the electrical harness connected to it is damaged, which prohibits the injector to open and close as required. The...

Q: Alternator is not working and the instrument lights are out.

If the charging system is not working, that is something that needs to be corrected first. Your car has a whole network of computer modules that will behave very strangely if the system voltage is not correct. Once you have...

Q: Banging sound at slow speed at left rear wheel well area

Hi there. Raise up the vehicle and check all of the suspension, sway bar, ball joints, and the shock absorbers. Makes sure that everything is tight. If everything is tight, lower the vehicle and do a bounce test on the...

Related articles

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...
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.