Engine swap comes with many other costs - if you swap to a more powerful engine, you have to upgrade your suspension/brakes to match or it'll be dangerous. Add to that the fact that if your new engine is heavier than the existing one (YRV falls into this category I believe), your car's handling characteristic will change, making it have more of a nose-heavy feel.

Overhaul would be the cheaper option, but it depends on where you get it done as well as the quality of the job and/or parts used. Prices range from less than 1k all the way up to 5k so it really does depend on your budget.

Not sure about that, sorry.

hi!

my Kenari had auto gearbox problem previously, around early of May. was considering to get k3ve in or just change the gearbox. my rough calculation show me it gonna cost around rm10k.

halfcut + installation, ~rm5k
brakes + installation, ~rm1k
adjustable suspension, ~rm1k

not to mention if anything went wrong with the halfcut engine or brakes that incur more cost; there is a lot of hidden cost that kills! you won't know when you spend bit by bit.

plus also like Vinod mentioned, car handling will change. i personally drove a Kenari once, fitted with k3ve auto + semi slick, no doubt i enjoy straight road very much, but when comes to taking corners the feeling is just not correct.

that's why i got ended up with just the gearbox replacement.

i'll suggest you to get the overhaul done. some tips here, if you have time to lepak in workshop and your mechanic willing to follow what's below:
1. clean the engine from top to bottom; inside to outside;
2. clean and measure clearance for piston ring and main bearing; if it's within the spec, please don't change; if it's out of spec, change when only you/your mechanic able to get to correct spec, if can't, change = no change, vice versa (most of the workshop don't perform this job, wasting time);
3. additional info for statement above, if there is worn or burn mark on main bearing then so sorry you'll have no choice to replace it;
4. grind valve (no worries for most of the workshop);
5. get all the oil seal thingy replaced;
6. new engine head gasket (skim engine head if required);
7. install everything from top to bottom of the engine with correct torque spec;
8. measure the valve shim to get to correct clearance (most of the workshop don't perform this job, wasting time).

yea, so as Vinod mentioned, that's what a ~rm5k job looks like. a cheap one, forget about 2. & 3. & 7. & 8., 5. & 6. most likely not an original parts.

theoretically, it's not require to replace crankshaft, piston, con-rod, valve, camshaft and valve bucket unless it's damaged.

engine mounting cost you rm200++ to rm600++. from genuine Perodua, so called original Daihatsu to third party, you just name it, any shop can get for you.

i'm so sorry if the reply is too long 
hi!

auto or manual? if auto, during Neutral or Drive?

3 piece to be replaced. engine mounting cost you rm200++ to rm600++. from genuine Perodua, so called original Daihatsu to third party, you just name it, any shop can get for you.