Does the Timing Chain problem only affect certain models?

[stick3]

I have a 2005 190kw engine.
Does that mean I have the better chains to begin with and if anyone knows, does that mean a lot less chance of chain failure?
Has done 172000 so far but it's always in the back of my mind , scaring me.

have you done the pcv mod https://forums.justcommodores.com.au/threads/alloytec-pcv.279039/

 

[shueardm]

yes

 

[figjam]

I have a 2005 190kw engine.
Does that mean I have the better chains to begin with and if anyone knows, does that mean a lot less chance of chain failure?
Has done 172000 so far but it's always in the back of my mind , scaring me.

Not my expert opinion, but info gained from searching many moons ago .........

In January 2006, 7.7 mm inverted tooth timing chains were introduced for the Alloytec V6 engines, replacing 9.5 mm pitch roller chains. For some – but not all – of these timing chains, the chain links were not manufactured in accordance with design specifications and the chains could become elongated (also known as ‘stretched timing chains’). According to GM Bulletin H08-0601-01, chain elongation was expected to occur in early engine life (i.e. 10,000 kms to 20,000 kms). There have, however, been reports of timing chain elongation occurring at significantly higher kilometres.

The engines with timing chains susceptible to elongation were produced from January 2006 to engine build date 18 May 2007 (18/5/2007); this production range corresponded to engine numbers between H053340001 and H071380576.