whirring noise in engine compartment?

[blingoblongo]

hi all,

i have a 2003/4 berlingo 2.0 hdi and a while ago i noticed a whirring noise that occurs after engine is switched off, sounds like a small electric motor or pump and it lasts a few mins before fading.

it continues even if battery disconnected.

i noticed it again today after it wouldn't start after i changed fuel filter.

my berlingo does not have fuel pump in tank as it has the pressure bulb near filter.

any ideas what it is?

thanks.

steve g.

[Col]

You've already posted this

[geoff]

He put this question in the wrong section ( M49 ) before and has now started a new topic in the correct area in an attempt to get a better response, hopefully.

Anyway, if it happens with the battery disconnected then it cannot be a motor or other such item. In the previous posting I suggested it might be the cooling system depressurising.

[blingoblongo]

cheers geoff! i hear what you are saying, but it definitely 'wirrs' like something spinning down.

steve.

[tanto]

As I posted in the other thread also, it would appear to be the brake servo making the noise on my M59. Stops after a few pumps of the pedal.

[Mrleadfoot]

Same with mine, I just guessed it was the ecu shutting down' certainly causing no trouble.

[blingoblongo]

surely the ecu has no moving parts? and it wouldn't continue if battery disconnected?