replace your head gasket seal, clean the oil out of the tubs, replace spark plugs and wire harness for the side thats bad. really easy. take a tub to autozone and tell them you need some of those and they will get them for you. I had to do the same thing on my truck, bout a couple hour project.

1994 Isuzu Rodeo 4x4. Indy4x lift shackles in rear, cranked bars in front. 1 1/2" lift on 31" Pathfinder a/t