I have just bought a 1990 300ZX and the previous owner said it has not had a timing belt or spark plug change because it hasn't reached the
100,000 Klms service yet. It has only done 84,000 Klms. I thought that the timing belt also has an age limit so must be changed by age or kilometers whichever comes first. Any thoughts on this and any other serviceable parts that should be replaced now would be appreciated.
Cheers.