w210 e300 td engine knoking

[andy75]

Hi
when cold engine knocking
realy distinct metal cpatering
but dissapears after 15 20 seconds
but not chain
can it be fuel pump

 

[4life211]

it is diesel engine what do you expect.

 

[a111r]

How many miles?
The OM606 is a gem of old tech. IDI as you probably know.
Worn injector nozzles = 'nailing'?

Sounds nowt too serious, anyway.

 

[Erfan]

If you are using a 10W oil maybe change to 5?

 

[spoton]

its more than likely just a bit of air in the fuel, not enough to cause trouble starting but enough to describe your symptoms exactly,and nothing to worry about

 

[andy75]

i think that it may be one of the injectors is going nuts
it started to smoke a bit when driving
and fuel consumtion increased dramatically,
can it be injector ??

 

[a111r]

Yup. Slacken off each injector pipe to find which one. Or use the hammer handle stethoscope method.

 

[91dm]

How many miles has the car done, any previous injector/pump work done? Could be an bad injector or lifter. Maybe post a video?

 

[maxypriest]

How many miles has the car done, any previous injector/pump work done? Could be an bad injector or lifter. Maybe post a video?

Good point - I had a OM606 with a sticky lifter and it would do exactly as OP describes. It was a NA .910