Hi guys. Steve is right. Changing to a different engine size, and often the same size from a different year, is not a good idea, ... But there is one exception. That is switching from a 2.7L to a 3.5L. I'll have to find out the year and model, but a friend of a friend did that exact swap on his mother's car. Nothing else had to be replaced, not even the Engine Computer.
Chrysler always used to be the manufacturer with a well-known reputation for good parts interchangeability, but those days are gone now. I was really surprised a few years ago when I saw this swap when it was completed. The person doing that swap is a very competent do-it-yourselfer who has restored quite a few older oddball cars, so he knows how to research these topics. He puts together some nice stuff and doesn't cut corners.
One thing you want to look at is the flex plate and the holes or notches in it that are read by the crankshaft position sensor. Over the years, there could be three sets of four notches, or two sets the same and one set has one more or less notch. If the replacement engine uses a flex plate with different notches, use the original one to the car over with the replacement engine. If you use the wrong one, you'll have a crank / no-start. The Engine Computer counts those, along with the pulses from the camshaft position sensor, to know when piston number one is coming up on the compression stroke.
Sunday, December 27th, 2020 AT 3:34 PM