I know it is cheaper in the long run, but my 1.4 engine is throwing oil in different places. I need a replacement and fast. an rst lump is more expensive in buying than a xr3i lump.

But the best option is to hang a rst lump in it you say? where do i have to watch so i don't buy a dodgy one? How can i reckognize a worn turbo etc etc? are there some places i must inspect because they are sensitive?

If i'm still going for a xr3i lump, is my best bet the EFI system or the K-Jetronic?