C250 CDI timing chain noise?

[Paul297]

Hello everyone,

I've noticed since I bought my C Class a few months ago, the engine makes a strange noise than can be heard in the cabin. On start up, it's louder for a few seconds and then quietens down. Sometimes it's also accompanied by a grinding noise that last a couple of seconds.

This is only on cold starts and it doesn't always make the grinding noise.

I suspected the timing chain. The car has done 66k and has a full Mercedes service history.

I managed to get a video toward the back of the engine. You can hear the chain, but I don't know if it is a normal noise or not... what do you think?

I've got a 2 year warranty on the car. But I've got a feeling if I went back and said I think the chain and tensioner are going, they'd try and get out of changing it and out it down to wear and tear. So I'm on an information gathering mission.

What do you think?

Thanks

Paul

 

[ajlsl600]

U have the warranty get back to them see how that goes. Read all the small print.
Failing that.me, I would try changing the tensioner,oil and filter. Cut open the old filter take a look for tiny metal bits,unlikely but check anyway.if that shuts it up disable stop start and plod on ,if not make a plan to change chain as well ,with look at any sprockets u can see. If still making a row after tensioner,filter oil ,it WONT ge getting any better and maybe a LOT worse.

 

[Dean Fletcher]

Hello everyone,

I've noticed since I bought my C Class a few months ago, the engine makes a strange noise than can be heard in the cabin. On start up, it's louder for a few seconds and then quietens down. Sometimes it's also accompanied by a grinding noise that last a couple of seconds.

This is only on cold starts and it doesn't always make the grinding noise.

I suspected the timing chain. The car has done 66k and has a full Mercedes service history.

I managed to get a video toward the back of the engine. You can hear the chain, but I don't know if it is a normal noise or not... what do you think?

I've got a 2 year warranty on the car. But I've got a feeling if I went back and said I think the chain and tensioner are going, they'd try and get out of changing it and out it down to wear and tear. So I'm on an information gathering mission.

What do you think?

Thanks

Paul

Sounds normal to me another noisy diesel

 

[Dean Fletcher]

This is a rattle

 

[Paul297]

To be fair, the video I posted wasn't the best. Seem to hear it more in the cabin.

Is it normal for the engine to sound louder/rough for a few seconds on a cold start?

 

[Dean Fletcher]

To be fair, the video I posted wasn't the best. Seem to hear it more in the cabin.

Is it normal for the engine to sound louder/rough for a few seconds on a cold start?

Yeah mine does especially if its stood for a while.

 

[sonic]

Take it in to MB get their opinion, its under warranty. If they say its normal & you have a problem later, its good evidence for a claim. Plus it puts your mind at rest.

 

[ajlsl600]

When mine stood .I dont let it catch the first few times ,ensures oil getting around.one hopes ?