w210 - e300 td buzzing from egr(?)

[mojo7676]

I've noticed, for some time, a kind of buzzing/clicking noise coming from the engine bay - the right hand side, inner wing, close to bulkhead...ish. The noise - which is more of a whirring buzz, now that i think about it, can only be heard when the engine is warm and switched off. the other day, i investigated more fully and located the noise to what i think is the egr valve. When i took one off the vac hoses that goes into the top of it, the noise abruptly stopped. i've tried the same thing a few times and i always get the same result: switch engine off, pop bonnet, hear buzzing noise from egr, take off hose, slight hiss, buzzing stops.

questions: does anyone else hear the same noise under their bonnet when engine hot but off. is the valve knackered? can that be the reason why my econ is so lousy - i've posted several times about economy and have lots of advice and feedback from a few people - previously, a diesel expert capped the egr off for me, advising this could help improve my econ. it didn't so i replaced the hose.

tia
mojo

 

[television]

Are you sure that this is not the purge valve making the noise, EGR valves do not make a noise

 

[mojo7676]

Well, havign re-read one of Parrot's old missives (related to this subject, and my car, as it goes), i realise it's not the EGR but some kind of sensor. I think this is the link to that thread - http://forums.mercedesclub.org.uk/showthread.php?t=26743&highlight=valve+capped

i've also attached the pic of the part that's under discussuion - the bit that makes the noise. again, it's from parrot's post above.

hope this makes things clearer

mojo

 

[television]

I think that that is the purge valve

 

[mojo7676]

suppose it is the purge valve, the question remains - is it supposed to display/have the characteristics i've outlined in the original post? mojo

 

[television]

suppose it is the purge valve, the question remains - is it supposed to display/have the characteristics i've outlined in the original post? mojo

Yes sir it does do that

 

[mojo7676]

clears that non-issue up, then. thanks for that

mojo