Tap water from your house
Coolant I believe.
On a 2004 Vauxhall Vectra ZC with a 2.2L engine, the coolant drain plug is typically located on the engine block, near the water pump or on the lower side of the radiator. You may need to remove some underbody protection panels or access it from underneath the vehicle. Always ensure the engine is cool before attempting to drain the coolant to avoid burns or injury.
The coolant should circulate through the entire water system.
Ok, 50/50 is pretty much the norm. Coolant is not what keeps your engine cool, the water is. The coolant is what keeps the water from freezing in cold weather as well as from causing corosion to your engine.
is coolant leaking from engine?or is it leaking from water pump and running down engine and appears to leak from engine
If there is no risk of freezing , but it will weaken the strength of the antifreeze / water coolant mixture
Either ready mixed coolant. Or. A 50/50 mixture of antifreeze and water.
A vehicles water pump circulates coolant ( water and antifreeze ) through the engine and to the heater core and the radiator. The coolant is warmed up in the engine and the coolant carries the heat to the radiator where it cooled down before being recirculated through the engine again.
The water pump
The water cooled engine will typically be heavier, because you have to add in the water pump, the radiator and the water/coolant. The engine block itself may be lighter as there are passages drilled out for the water/coolant to flow through.
Yes and no. Water is an excellent coolant but does not have all the properties of antifreeze. Water provides no freeze protection or corrosion resistance.
Water or coolant keeps the engine cool . -Some engines are air cooled.