Not sure about the cost of fixing a busted head since, awa ng Diyos, hindi pa nangyari sakin to. As for the overhaul, mga 1k daw ata. Instead of this, bili ka na lang bnew Evercool for around 3k.

Dami pwede maging source ng leaks e. There's the P/S fluid, clutch & brake fluid, coolant, engine oil. When you said left side ng hood, are you facing the front of the car? If so, pwede coolant yan since may overheating problem ka. In any case, since for sure papatingin mo yan, pa-diagnose mo na lahat para isang pagawaan na lang. Your engine might be ok, pero it could still have leaks kung may sira na mga seals, bearings, etc.