slight knocking sound when idling on 2.5i sport

[E30_rider]

hi,

there seems to be a slight knocking sound coming from the engine bay when its idling. anybody have any ideas what it can be?

[gcs325i]

Does it go away when you dip the clutch?

[E30_rider]

i havent actually checked that but will do and let you know

[E30_rider]

the sound wasnt there when i drove it last night..it doesnt seem to happen all the time

[m_jermyn]

Throw out bearing if you dip the clutch and it goes away..