Hi all! my NA has developed this strange noise it seems to come from the

back of the dashboard/rear of engine.

It only seem to do it when moving away from a standstill and sounds like some one flushing the toilet :confused: :confused: :headvswal

Any ideas!

condensation in the AIV pipe/pipes,see if you can hear it louder under the wheelarch, if so then thats your culprit.

Have you checked your coolant levels, if you have an air lock in your heater matrix then it can sound like that as well!

 

If it is the aiv's then they will gurgle on tickover, put your ears to the wheel arch and you will hear it the loudest there?

Have you checked your coolant levels, if you have an air lock in your heater matrix then it can sound like that as well!

 

If it is the aiv's then they will gurgle on tickover, put your ears to the wheel arch and you will hear it the loudest there?

 

It definitely sounds behind the dash, why would you notice it when you pull away from standstill? :confused:

 

PS. how do I get rid of an air lock if thats what it is?

Because water pours into the heater matrix when there is air in it, get the front of the car as high as poss remove the rad cap run the engine and top up the coolant when it needs it, and turn the heating to hot!

Cheers I'll try that :bow: :bow:

My car has had the same symptoms in the past (and recently again) and it was definitely air in the cooling system.

 

Do as Mark (Topless) suggested and get the air out of the system - this will definitely stop the "loo flushing" sounds! LOL

 

Don't forget to keep checking the coolant level for a few days in a row - you'll probabaly find that the level is dropping every few days or so.