also known as enjin lantai.

Bro, you civic already compression loss you can either opt to change the piston rings or plonk the enjin kosong in.

Overhaul - expensive but no prob over next X amount of years.
Enjin kosong/lantai - cheap, fast. But go for inspection to change engine number, make sure the enjin kosong comes with kastam paper. Not sure of condition of that engine.