I believe the engines are, both the 4AGE and 4AFE. Dealer reccomends timing belt change between 60k miles and 100k miles. Anytime between there is goond, and do the waterpump while you're at it.jenniferimai said:Is a 91 Corolla ae92 a noninterference engine? How often does the timing belt need to be changed? I know the dealer manual says 60,000 but how true is this?