I know this may seem like an odd question, but does anyone have any idea of what the coolant capacity is for just the engine block? Basically how much coolant is in the engine, not radiator. Also, how much does the entire system hold?
The manual shows the cooling systems hold 6.9 qts. (1ZZ), 7.1 qts. (2ZZ). Not positive about the Vibe but usually the block holds +/- half and the hoses, heater core and radiator hold the other +/- half.