Need help with van-loud knocking noise on 1992 Chevrolet G Series Van (G20)

Where can I find a replacement motor for my van or does it need one? When the egnition is started-there is a load knocking noise-someone said it is the motor Help

Asked by for the 1992 Chevrolet G Series Van (G20)
Probably the local auto and truck wrecking yard is your best bet and possibly they know a shop that can install it for you. Once the engine starts knocking it will need a rebuild or replacement