Rotating clicking noise from engine

keithmerc220

New Member
Joined
Aug 24, 2013
Messages
10
Car
CDI 220 Classic estate
I have 2002 classic 220cdi auto estate.
When I press the accelerator there is a rotating click noise from the engine with gets faster as I accelerate. As soon as I stop accelerating and cruise the noise seems to stop. I was wondering if it was the turbo unit?
 

Stratman

MB Enthusiast
Joined
Jun 15, 2003
Messages
4,986
Location
Sunbury
Car
W203 C200 CDI '04Estate
Welcome to the forums.

Sadly, the news isn't good. You have described the classic symptoms of Mercedes Black Death (use the forum Search facility). The seal between one or more injectors and the cylinder head leaks and the combustion gasses escape with the noise you mentioned.

Look carefully in the injector wells and if you see a mucky black gunge in any of them the diagnosis is confirmed.

The cure is to remove the injector(s), possibly recut the seat and replace the injector using a new crush washer.
 

StevenN

Active Member
Joined
Sep 12, 2010
Messages
437
Location
Nottingham
Car
E220 CDI 2002 W210 Auto
Or it could be the Alternator Pulley?

Look to see if the serpentine belt jumps when you run the engine
 

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