whats the best way to do a leak test on motor?

slickerthanyou makes them I recommend buying one great guy and they are solid 30 bux the best investment u will make. Send him a pm he will set u up
 
Fill the engine with water and food coloring let sit ovr night and if there's no stains on the outside in
The am drain it fill with oil and Boom Goes The Dynomyte. (Ready to go)

Never heard of that method. :-/

PM slickerthanyou and talk to him. Great guy to deal with.