remove timing cover
NO, you do not remove the head to replace the timing belt on any car.
It is near the bottom of the timing belt in a Chevy. It is part of the ignition system.
you dont
90,000
It is depended on the condition of your timing belt
You never need to replace the timing chain if the engin use timing chain(not timing belt).
according to Dayco timing belts it is 120.000mi
2000 Toyota Celica have timing chains.
Every 60,000 miles
Check and replace as necessary every 20,000 miles or 2 years. Replace at 60,000 miles or every 6 years.
The timing belt on a 2000 Isuzu Trooper is replaced by removing the engine accessories, taking off the timing cover and loosening the tensioner. The belt can then be slipped off the sprockets and a new timing belt put in place.