On Alfa number 15
AO Platinum Member
Join Date: Dec 2005
Location: United Kingdom
The cam belt is under the cover and drives only the camshafts.
As for the auxillary belt this is on the outside of the cambelt cover and drives the alternator, air con compressor, the power steering pump and the water pump. It can bee seen and changed from under the driver side (on RHD) wheelarch. After removing the wheel you need to remove a small access cover, then you can see the belt and tensioners.
The Fixed tensioners/pulleys are often referred to as idlers, where as the adjustable tensioner is the one that is sprung so tensions the belt.
There are 2 fixed tensioners and one moving tensioner on the V6.
If you need a copy of the V6 24V manual that shows the belt layout, PM me your email address.
You will never be cool driving a Vauxhall.