Reina Rebuilds Established in 1984. Our engine rebuilding shop was founded in Mexico in 1984 after the Reina Family had already been in the automotive mechanic business for over 30 years. After a successful history of providing high-quality rebuilt engines to the Mexican market, in 2018 the Reina family decided to expand their reach and start offering their products to the US market thru a distribution network based out of Phoenix, AZ.