Why does my Mercedes Benz cold start make a rattling noise?

Why does my Mercedes Benz cold start make a rattling noise?

There is a strange sound coming under the hood on cold start – below the freezing point. As it gets colder, the sound stays longer. At a couple of degrees below, the noise stays on for about 1 sec. and at 20F, it increases to about 3 secs. It started last winter with 35K mi.

Why does my car rattle when I start it up?

When the engine is started after sitting overnight, the oil pressure takes 3-5 seconds to come up to “normal”. (It comes up instantly, not slowly.) The engine “rattles” until the oil pressure comes up to normal.

What makes the chain rattle on a Mercedes Benz?

The rattle noise heard in the earlier M271.9 is not like the later model caused by a slapping momentum of the cam adjuster. It is actually the sound of the chain links, skipping over the almost completely worn out teeth of the earlier cam adjusters. (Refer Figure 5 below.)

What kind of noise does a car make when it starts up?

It’s like an extremely loud rattling/clanking noise. It doesn’t do it when cranking, it’s only when the car first starts up (more noticeable on cold start-up). It’s also not every time you start it, only when it’s been sitting awhile (such as over night). I’m not exactly sure what it is but it’s pretty loud.

There is a strange sound coming under the hood on cold start – below the freezing point. As it gets colder, the sound stays longer. At a couple of degrees below, the noise stays on for about 1 sec. and at 20F, it increases to about 3 secs. It started last winter with 35K mi.

Why does my car make a rattling noise under the hood?

As a result, there’s a wide variety of sources that can cause rattles. Let’s start with rattling noises under the hood that are caused by oil or fuel-related problems: Your engine oil pump circulates motor oil through the engine, lubricating the internal moving parts.

Why does my Mercedes Benz rear deck Rattle?

There is a metal ball that rattles around. I strongly recommend wrapping the the outside of the unit (NOT THE INSIDE) with sound deadening material…DO NOT remove the ball. This will stop the noise by 90%. If this helped you give me a thumbs up and definitely subscribe to my channel; I would love to have you in this community!

Why is my car making a ticking noise?

Over time, the engine can consume, burn or leak oil. If the oil level gets too low, you can have a situation where the oil pump sucks air into it and the air gets pumped through the engine along with whatever oil is remaining. This can cause a rattling or ticking noise from within the engine.