Are the C20xe and C20ex the same motor?
There is a 20XE and a C20XE, effectively they are the same engine and the C denotes a catalyst. Any other number and letter combinations would represent a different model of engine.
Can you tell me how much a 1.6L 16v Ecotec engine weighs without manifolds & how high it is?
The weight varies quite a bit according flywheel modifications. For example, our engine with dry sump system fitted, lightweight flywheel, clutch & fuel injection is 90kg. Height again varies, but if I give you the height excluding the sump pan, it is approx 440mm high. The dry sump pan we do is a minimum of 65mm at its smallest (wet sump pan likely to be closer to 100mm deep).