New drivers can be quite startled by the sound of a “normal” cold engine. When you first start your car, if you hear a ticking sound, a rough idle, or the car seems to hesitate for a second, it’s natural to think that something is wrong with the car. But most of those sounds and symptoms are just symptoms of a cold engine with parts still warming up and fluids starting to move. Here’s why your car sounds funny in the morning, and what you can do to figure out if it’s normal or not.
- Pay attention to how long the symptoms last. If the noise goes away after a minute or so, it’s probably fine. If it goes away after 5 minutes, it could still be fine. If the noise never goes away, it could be a problem. Start the car and listen. Don’t rev the engine. Try to determine where the noise is coming from. Is it coming from the top of the engine? The bottom of the engine? The wheels? The easiest way to do this is to stand outside the car when you start it in the morning and walk around it. You can’t hear the car as well when you’re inside the vehicle, so go stand outside. Repeat this a few times and see if it happens every morning. If it happens every morning and goes away at the same time every morning, it’s probably fine. If it happens sometimes, but not other times, you may have a problem.
- Don’t put the car in gear and hit the gas to “get the rough idle out.” This can mask symptoms and potentially make the problem worse if the oil isn’t fully up to pressure yet. Just let the car sit and idle. If the symptoms improve over time, that’s a good sign. If the car starts shaking and the shaking slowly goes away as the car warms up, that’s probably okay. If the shaking persists, you may have a problem. If you’re still not sure, turn the headlights on and off. Turn the A/C or heat on and off. If the idle improves when you turn something on or off, that might give you a clue as to what’s going on without using any tools.
- Repeat step 1 a few more times. Spend a total of 15 minutes doing this. Then let the car warm all the way up. Turn it off. Wait a few minutes. Then start it again. See if the car sounds any different when it’s warm than when it’s cold. Compare the sound of the cold car to the warm car. This will help you figure out what sounds are related to a cold engine. You can also touch hood of the car with your hand (very carefully, as it can get hot quickly) to see when it starts to warm up. Over time, you’ll get used to the sound of a cold engine. This process may seem really silly, but it helps you figure out if there’s a problem with your car or not.
The goal here is to learn enough so that when you hear a funny noise, you don’t just think “that sounds funny” but instead think “oh, that sounds funny. I wonder if the oil isn’t circulating very well yet, or maybe the computer is running a richer mixture of fuel than normal because the engine is cold. Or maybe there’s too much clearance in a cold engine.” That way you’re not just guessing at things, you’re using what you already know about the situation to make educated guesses. And you know what? After a while, you’ll get good at it.