Q: Car rattles after starting

asked by on

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

A: Hi. It's difficult for me to say withou...

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.

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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Car window won't roll up

Hi there. A window that will not roll up is usually caused by a bad regulator or motor, however, this could also be an electrical problem, such as a failed switch, or bad wiring. As these things often require disassembling...

Q: Brake lights not working

From the description provided, it appears that you are experiencing an electrical problem with the brake lights on your Jeep Liberty. Having aftermarket equipment installed can sometimes cause problems, especially if they were not installed correctly. I would recommend enlisting...

Q: vehicle will turn over but not start

Vehicle electronics are very sensitive to voltage fluctuation. Crossing battery terminals/jumper cables can do a lot of harm when mistakes like this are made. Your symptoms sound like a shorted PCM (Power Control Module). Since you can't get the vehicle...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
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...