do you have a picture of the crack or picture lang of the damaged part.

isuzu 4JA1 engines have a thin cylinder sleeve, as thin as a sardine can lang maski i double sleeve pa to it is still thin. i cant imagine to can handle the compression if damaged na ang cylinder sleeves. unless iba ang sira. also isuzu engines commonly pag na sobra ng overheat mamatay ang makina as usual sa all diesels.

more details lang sa damage, 3 years na running ganda siguro mag ayos ng mechaniko. pics na lang to help us determine what part of the engine ang na damage.