Strange noise.... ML270Cdi

[GSMGuy]

What a time to pick... On way to hosp on Saturday.... Other half on back seat.... IN LABOUR!!!

VERY strange hissing/jangling noise coming from intake manifold side of engine, very audible through passenger footwell... BUT only under boost - ie acceleration... Power is fine, and engine running fine, it's like something has come loose and is allowing pressure to bleed off, and rattling in the process... Seems to be a fair bit more black smoke coming out of the back too...

Just wondering if there were any known issues on this?

Mike

 

[Stratman]

Boy or girl?

 

[GSMGuy]

Boy - Baby Michael, 9lb 9oz... Sadly, he is in the HDU at Alder Hey at the moment, low Sats, but improving, and he is a beauty... I did the night shift.... Mum is there with him now... For my sins, I have the other 4 at home today.. School hols....

Mike

 

[panason1c]

A known issue is a problem with the inlet manifold (internal flaps) at higher mileages.

 

[GSMGuy]

A known issue is a problem with the inlet manifold (internal flaps) at higher mileages.

Hmm... any more info?

Mike

 

[panason1c]

Hmm... any more info?

Mike

More info here.........



http://www.mbclub.co.uk/forums/showthread.php?t=34502&highlight=inlet+manifold

http://www.mbclub.co.uk/forums/showthread.php?t=29928&highlight=inlet+manifold

http://www.mbclub.co.uk/forums/showthread.php?t=23184&highlight=inlet+manifold

 

[GSMGuy]

Thanks for that - must say, mine is fine on power and definately not in limp mode though...

Mike

 

[Dieselman]

It sounds like it's leaking off boost and drawing more air through the MAF so causing black smoke due to additional fuelling.

 

[GSMGuy]

It sounds like it's leaking off boost and drawing more air through the MAF so causing black smoke due to additional fuelling.

Dieselman, any hints on where to look 1st - it's kinda cramped in there.....

Mike

 

[GSMGuy]

Sorry for not looking in for so long, had a bad few weeks, baby Michael Francis passed away on Good Fri aged just 6 days, so not been the best of times for us - but car still has to be fixed

So on the subject of the internal flaps, surely if it was internal I wouldn't get the sound of boost leaking off? Wondering if anything has come "loose"

Mike

 

[MBManInKen]

Sorry for not looking in for so long, had a bad few weeks, baby Michael Francis passed away on Good Fri aged just 6 days, so not been the best of times for us

I am truly sorry to hear about your loss and even though it won't diminish your grief, I want to offer my sincere sympathies to you and your family.

 

[Harley Man]

So Sorry to hear your news .

On the Car take a look at the turbo rubber hoses, you may have a split in one, I had that on my W203 C220Cdi it made an odd noise for a while and then started going into limp home mode.

David

 

[Dieselman]

GSM Guy
Really sorry to hear of your loss...you have my sympathies.

I almost don't want to carry on with the post, but you were asking.

As said by HarleyMan check the intake ducting but also it could be a blocked Cat causing too much back pressure. I suspect the intake side though.

Good luck.

 

[GSMGuy]

GSM Guy


As said by HarleyMan check the intake ducting but also it could be a blocked Cat causing too much back pressure. I suspect the intake side though.

Good luck.

I have already removed the lower cat, and performance seems ok, apart from the noise.... Don't suppose anyone has any pics of the underside of the inlet manifold, so I can have a feel around??

Mike

 

[Gucci]

As with anybody who reads your thread, myself and my partner are so sorry to hear of your news. Take care.

 

[GazCaff]

GSMGuy,

I'm really sorry to hear your terrible news, you and your family have my sympathies.

 

[pammy]

Have only just caught up with this thread and such tragic news. I am so very sorry.

 

[marcos]

Sorry to hear of your sad news, my thoughts are with you and your family.