My mom has a '95 4Runner and yesterday it sent a piston through the block. She called me and said she was on the side of the road, so when I pull up I get the 'not so fun' sight of seeing her crying and a huge puddle of oil on the ground. Looked on the passenger side in the fender well and sure enough, seen the exit wound. I know my mom wasn't driving crazy, or bouncing it off the rev limiter, but what the hell?.There was absolutely no warning signs. Just driving normal and POW! Anyways, what would be the best option? Is the head still of use? Or does it cause damage up top when the bottom end takes a dump? Thanks for any help, it is greatly appreciated! Mileage was approaching 170k.