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K Durose
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Click noise on startup

Hi folks
I'm curious ! When i startup my 156 I hear a knock (a sort of loud click really) after the engine has been running for about 5 seconds. Its almost as though something is being turned on or off. Is this normal ? It only does it once, its not as if it keeps knocking, but it is a bit alarming ! Sounds electrical rather than mechanical.

Thanks in advance,

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Join Date: Apr 2002
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Member car:

Alfa 156 2.4 JTD


The air conditioning pump makes a loud click a few seconds after the engine starts.
I've changed mine so it only comes on when I want it rather than the aircon being in full auto mode.
Kristian Benning is offline  
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I would say it's the airco also, just switch it on and off to compare the sound.

Good luck!
Ivo is offline  
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I had a clicking on my 156, it turned out to be the starter motor...which was replaced under warranty!!!
K Durose
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Thanks guys.
I've checked it out and it is indeed the aircon motor ! Doh !!
There was me thinking it was something wrong...

I knew someone would know what it was. This site should be renamed ""

Thanks again,


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