Yes, my mechanic mentioned the 3sfe when I made a face after he told me he wanted to swap in a 7k and then further went on to say "magar uss mein kaatna paray ga".
I would love to put in a more powerful and newer engine if fuel economy is around and about the same. Which from reading most posts, is around the 10-12km/l with A/C. I was getting around 8km/l w/o A/C on my 4k. So still seems like a win. Any idea how much a good condition 3sfe is going for these days? 7k if I'm not mistaken is around 50k for good condition.
Also reading around, it seems that parts for the 3sfe are readily available and seems like a pretty reliable engine. How would you rate it's servicability and fixability?