engine bay noise

[bluelingo]

when i switch my engine off there is like a whistling noise in engine bay near fuel filter area .it lasts about 10 seconds. also van starts to run rough sometimes seems to lose some power,if i stop and switch van off then start it again its fine .might not happen again for months .:brickwall: 02 1.9 diesel van dw8

[evdama]

Fuel pump pressure (+/-) subsiding could be the whistle.

Fuel filter clogged maybe for the second one.
Wouldn't hurt to change it if it hasnt been done for a while

[bluelingo]

ok will try that thanks

[bluelingo]

just feplaced rocker cover gaskets and put everything back together and engine noise has stopped for now:woop:

[bluelingo]

noise is back again any ideas?

[evdama]

noise is back again any ideas?

All the citroens(all diesels) I have owned quietly whistle for a few minutes as you describe,including the C15 which was a 1.9 non-turbo.
All of them did this from new.
As long as the motor otherwise runs ok I wouldnt worry

[bluelingo]

ok thanks