I have a 97 4runner with a blown head gasket, i am thinking about just putting a new rebuilt motor into it. i was wondering what all else i should replace when i swap the motor out with a new one. Would i need a new radiator and piping for it? Any comments are much appreciated.

 

more info is needed like engine size and such.

the basics like rear main seal, front tranny seal and new clutch, along with timing belt and water pump.

Timing belt and water pump are usually a requirement of any warranty offered on a used engine.

as well if you have a manual then new clutch and throw out bearing, and if an auto then I would suggest a new torque converter to give the best possible fuel mileage. I would suggest pulling any of the parts that you can from the old one if it doesn't just end up in the garage under the shelf like coils and sensors and such.