Quote Originally Posted by hmetro24 View Post
A mechanic told me when ever I wanna change pistons to new pistons, I may have problems with cylinders, due to the heat the sleeves and pistons will not be oval.So i have to take the Bottom and machine the cylinders. Anybody can confirm if it's possible to change to new piston with out taking bottom end out.
without taking bottom end out of the car?
yes possible but 10x the effort.

so much easier when engine is on stand and you can turn it around to fit conrod cap, measure end gap, let engine oil drip on drain pan etc.

not to mention oil drip gonna be a real pain.