Rm800 is done take out whole engine already ,if take out whole engine ...recommend you do full overhaul,or else cut cost wash your engine 1st,monitor few day see where is leaking and do the leaking parts,maybe oil seal or some gasket leak only

Depend on situation bro,if your wan cut cost and thinking to sell off your car soon,dont do so much,cut budget....if you wan use long term,then i suggest you done full overhaul,bring your car to trusted foreman.some parts really need take out only can see ,if you dont wan headache with your car,done full overhaul already then in future take care your car.