Good day guys!

Im not sure if Im on the right thread but I still hope you can help me. My corolla's been displaying symptoms of a blown head gasket (loss of oil, overheating, white smoke during start ups, mud like substance on the radiator cap). If I opt to have a top overhaul, ano po ang mga papalitan or aayusin doon and magkano po usually ang top overhaul.

Thanks and more power!