I asked about the sound from alfa mechanic. He said that it is the EGR
(exhaust gas recirculation) valve that ticks. The valve opens and closes
depending on the engine's operating status.
MPL


"Paris" > wrote in message
om...
> "Grahame" > wrote in message
>...
> > Hi All,
> >
> > Just took delivery of a new Alfa GT (Stromboli Grey, Black Alfatex, 17"
> > spoked Alloys) - beautiful car, very pleased with it.
> >
> > One odd thing though, when the climate control system is on, there is an
> > audible "ticking" noise (sounds like an old grandfather clock) coming
from
> > behind the dashboard.
> >
> > Is this normal? If not, any idea what could be causing it? I'd like to
have
> > some idea before I go back to the garage and confront them with it!
> >
> > Many thanks,
> >
> > Grahame.
>
> Hi all,
> my 147 1.6 TS 120BHP does the same from the very beginning.
> Initially I thought it was a bomb or something but after 14 months it
> has not yet exploded!
> I finally ended up to believe that it happens on dual zone climate
> control versions. Possibly there are 2 temperature sensors (each for
> every zone) and one relay which alternates every second between the 2
> sensors (Only one analog channel on the ECU). That is a logical
> explanation I think.
>
> Best regards
> Paris
> Greece