heard a pop under the hood while driving, what could it be? on 1990 Chevrolet Astro

yesterday while driving my 1985 astro i heard a small pop under the hood, and then immediately the van shut off and will not start. i think it might be a broken timing belt but im not sure. any ideas?

Asked by for the 1990 Chevrolet Astro
1 answer
No timing belt on this one. Going to have to get someone to look at it to determine what happened no use guessing.