lost on an
Join Date: Sep 2011
County: Australian Capital Territory
All the timing chain parts are General Motors parts. My car is going through the change at the moment. As Ned says there are three chains, various slipper pads, and depending on what makes the noise camshaft sprockets. Here are the GM part numbers that you'll need.
Crank Sprocket S921 12599721
Idler Sprocket S930 12612841
Idler Sprocket S932 12612840
Primary Timing Chain C753 12633451
Secondary Timing Chain (2) C754 12633452
Timing Chain Tensioner 9-5535 12609261
Timing Chain Tensioner 9-5536 12609259
Timing Chain Tensioner 9-5537 12609263
Timing Guide 9-5530 12586962
Timing Guide 9-5531 12599720
Timing Guide 9-5532 12599719
Timing Guide 9-5533 12623514
Timing Guide 9-5534 12623513
Timing Guide 9-5548 12588959
Exhaust Camshaft Sprocket 12588272
Inlet Camshaft Sprocket 12588273
You'll also need a timing chain gasket set. If you look in the right places you can get all these for less than $US 1100. There are various kits available on eBay. They won't mention the Alfa engine, but look for LY7 as this is the 'High Feature V6' engine that is most equivalent to the GM engine. Some kits have the gaskets but not the sprockets.
I suspect, from the distance of being in Australia, that Ned's price list is based on Alfa parts and does not included the camshaft sprockets. However, I rather like Ned's labour rate, as it is an engine out job. There's no chance that I could get it done for $1900 in Australia. Ned might be more practised and efficient at removing and installing engines. I saw 29 hours of labour mentioned in one post on this forum, but I don't recall who in the UK was doing the work.
A modification was made from April 2007 as far as Holden Commodores go. I'm not sure how that applies to Alfa Romeo engine production in Melbourne and then shipping to Milan, but if you look for a 2008 build Brera and look at the service records for frequent oil changes, then you should be fine.