Q: Engine rattles when I I turn on my engine for the first time in the morning. It seems like it only does it when it's cold

asked by on

My car engine rattles when I turn on the engine for the first time in the morning. It only rattless for a while for about 5 seconds after that the car doesn't do it all day. It only does it when the car has been off for more then 8 hours. I was wondering if it's maybe the timing belt as I've read other comments about this problem and also maybe the engine oil?

Here's the link of the video of how the engine sounds when I turn it on for the first time. https://youtu.be/1nsmncAMRJQ

My car has 90000 miles.
My car has an automatic transmission.

Hello. Most likely, the noise you describe is coming from one or both of the camshaft phasers on your engine. These devices which are operated by engine oil pressure, vary camshaft timing (relative to the crankshaft), enhancing engine performance and fuel economy. Since these devices are operated by engine oil pressure, when the engine is off overnight, engine oil drains out of them, and it take the first few seconds of engine operation to refill them when you first start the engine each day. For those few seconds, a metallic rattle can be heard as you have experienced. While not immediately threatening, they should be replaced when the timing chain service is done on your engine.

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. Engine rattles when I I turn on my engine for the first time in the morning. It seems like it only does it when it's cold

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: Key won't turn over, 2009 Pontiac G8

An engine that cranks but doesn't start is lacking one or more of the following: compression, fuel, or spark. You need to check for each of the following to determine the cause. You can check fuel pressure using a dedicated...

Q: Rattling noise on a 2002 Honda Passport

It's a 14-year-old Honda Passport and if you hear rattling sounds, a lot of times it is those little stabilizers bolts where the sway bars go and keep the car nice and tight for cornering. On each side there will...

Q: Can a wide turn on a pickup be fixed?

Long bed trucks do have a large turning radius, made even larger if the vehicle is 4x4. As the dealer said, this cannot be changed. However, if you feel the turning radius is abnormally large and others of the same...

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...
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...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...