So I have been given a 1994 Plymouth Sundance 4-door with the 2.5L 4-cylinder engine. It has only 98,000 miles on it, and the body is like new, but the engine knocks loudly. Also, the “check engine” light is on, and the speedometer does not appear to work.
I am interested in restoring this car, mainly for educational and entertainment purposes, and to gain experience doing major engine repairs. I have done timing belts, water pumps, various seals and gaskets, and even a cylinder head replacement, but never replaced bearings before.
I was planning to pull the head, let down the oil pan, and pull all four pistons out through the top. One of my friends told me that I could simply let down the oil pan and change the rod bearings from underneath. Is that legitimate, or am I better off to replace the pistons, rings, connecting rods, and rod bearings together?
I would rather leave the engine in the car, and not deal with the hassle of hoisting it out, unless the block or crankshaft are damaged.