The Gates website ( they make timing belts etc. ) shows the timing belt should be
changed at 60,000 mile intervals on a 1993 Lexus ls400
Most dealers recommend changing the timing belt every 90,000 miles.
Every 90,000 miles
At intervals of 90,000 miles
Timing chains never need to be changed, only belts.
in answer to your question the timing belt should be changed every 55/60 thousand miles
never
If the engine has a timing belt, it should be changed around the 150K mark. If there is a timing chain, it does not have to be changed unless it is damaged.
80,000 ---100,000
Must be changed every 60,000 miles.
According to my dealer, it should be changed at 150,000 km.
Pontiac Grand Prix does not have a timing belt. It has a timing chain and it is replaced when it breaks.
Every 80,000 kms
I believe that is at 105,000 miles