6NZ Cat 2000

[Puigmia2686]

Went to check out a 2000 379 EXHD I was super excited because the owner told it was rebuilt 200000 miles ago and the truck looked neat, got there he started it cold sounded beautiful went out on a test drive and felt it good even though felt it failing sometimes, didn’t mind it cause the truck was parked for couple of months, we got back to his house and opened the hood continue I went straight for the oil cap to check for blow by and the magic died,,, there it was not much but definitely blowby NOW should I buy it or not I really don’t know what went wrong with that rebuilt, what you all think should I do.