RADIATOR CAP; Is a mechanical parts of a radiator in all cars. which stabilize the coolant of a radiator. The engine block gets hot enough to cause steam bubbles to form.
With the cover in place the liquid coolant will smoothly circulates through the pumps,block and back.
with out the cap, the steam bubbles push coolant out of the radiator neck in large “burps”. This lost coolant makes overheating worst and if not quickly shut off, the heads of the engine can warps, causing the head gaskets to leak.which will generates a large repairs bill, which may make the car uneconomical to fix.