noise confused

hopeful

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clk cdi2.7 auto coupe 2005
02 220cdi daughter came home saying her exhaust is blowing , so put it on the lift and as i suspected no blow its all newish

there is a noise sound like a pinhole in the exhaust , slight tick and increases with revs ie like an exhaust blow , got under the car seemed the noise is in the exhaust under the front seat ,no by the front suspension , no maybe up by the airbox no cant find it

i hd an injector go a while ago , the noise sound like that without the chuff, fresh oil and fluids and drives well
i have no idea really where to look did think inlet mani but so lost now , it seems to be every where but does sound exhaust like , it can be heard a little as the car passes by

any thoughts please
 

robin.large

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CLS C63 AMG 2013
Use a length of hosepipe. One end in yer ear. The other end waved around at varíous places where you suspect leak.
It narrows down the area you are listening to but cuts all the background noise out.

Sent from my ONEPLUS A5010 using Tapatalk
 
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hopeful

hopeful

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clk cdi2.7 auto coupe 2005
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so, disconnect from the tap first
 

bembo449

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Mercedes Cl500, shitron dispatch
put your hand over the exhaust while its running up on the ramp , that should help locate if it is exhaust related
 
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hopeful

hopeful

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put your hand over the exhaust while its running up on the ramp , that should help locate if it is exhaust related
definatley not exhaust its near new and no joint leaks just sounds ticky like pinholed exhaust could be a light diesel knock or a cam tick .its just wierd to sound like an exhaust blow
 
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hopeful

hopeful

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cor i will need ppe and a mask next ha
 

bembo449

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definatley not exhaust its near new and no joint leaks just sounds ticky like pinholed exhaust could be a light diesel knock or a cam tick .its just wierd to sound like an exhaust blow
I still wouldnt rule it out but its your car pal and its free to do to
 


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