Buzzing after switching engine off

[GrantyBoy]

Does anyone else's FR 170 TDi make a buzz/hum for about 30 seconds after you switch the ignition off.
My Leon is in the grage and they have told me this is normal as it is due to the cooling fans for the turbo. I've never heard of this before and the noise is more of an electrical hum to me.

Just want to check with other owners before I speak to them tomorrow.
cheers guys

Grant

 

[warren_cox]

Is it coming from the engine bay or inside the cabin?

 

[GrantyBoy]

engine bay.
To me it sounds like a capacitor or the likes discharging.

I think my chain is being pulled by the garage but want some confirmation from other owners first.

 

[warren_cox]

Don't know if the TDi's run a turbo timer as such to keep oil running through the turbo after you switch them off. May not run hot enough on a diesel. I'll stop speculating as I'm not 100%!!

 

[foxy367]

Mine does it mate

 

[KarenFR]

Noticed mine doing the same thing the other night - not noticed it since.

Don't know if it's a coincidence, but the buzzing stopped when the coming home lights went off.

 

[SpursMadDave]

Yep mine buzzes too, funnily enough i only noticed it this week too as i parked in a different place when i got home and had to walk around and past the car...

 

[smilley792]

yep, mine does it too.

if you wanna know if there pulling your chain, pop the bonnet open, shut the engine down, and go and have a gander.

then come and tell us all your findings

 

[Tam]

water pump / oil pump .... running to cool turbo down ....

Cannot remember which one... think water .. was told .. but forgotten

 

[hundleton1]

its water i think to stop the engine cooking after giving it a woopind,

 

[foxy367]

So its a bit like a Turbo timer but without leaving the engine running.

My Mates got an Evo with a turbo timer but when you open the door it switches off. Think that might be a waste of time!!!!

 

[truCido]

sounds like the same thing the 1.8T's have. A secondary water pump that pumps water round for 10 mins or so after the engine has been turned off

 

[GarryGti]

yeah it the secondary water pump i think that keeps running to cool engine parts down. My scooby use to have a turbo timer but it would run when you got out the car and even locked it and just walk away. Brilliant thing for cooling down the turbo!

I thought about getting one on my cupra but aint much point really.

 

[mrsixstring]

Mine does this too. My previous motor did it as well so thought it was normal.

 

[thestonegate]

Mine does it too...but I'm not worried.

 

[spenny2004]

mine does it too as with the replies from other people it is normal just the pumps keeping the turbo cool

 

[GrantyBoy]

thanks guys

 

[Goot]

I'm glad I did a search, was just about to ask the same question!

Goot