Timing Chain

[TigerVX]

When does the timing chain need to be replaced on a vx?
I've just checked my workshop manual and it doesn't mention anything.
The last couple of cars I had were at 100k.

[VT-565]

when it's either broke or you have some side effects from a stretched chain...really, i never gave that much thought but i have never really heard of them having to be changed at a regular interval...thats the beauty of them over belts, which usually get changed at 100,000k's anyway