Replace the radiator cap with the proper OEM cap. Be sure and use the exact same pressure cap. If this happens again after replacing the cap, then you need to do a complete service of the cooling system. Drain, flush, replace thermostat, refill with a 50/50 mix of the proper coolant and distilled water, and bleed air from the system. Also inspect cooling fan and water pump for proper operation.
The overflow tank is either cracked or its overheating and leaking from the cap
First thing would be to check if you have enough and correct water/Antifreeze mix in the overflow tank.
Engine overheating will cause the anti-freeze to surge into the overflow tank. A blown head gasket will also cause the anti-freeze to surge into the overflow tank.
no you need to replace temperature sinding unit
THATS WHAT THE OVERFLOW/EXPANSION PACK IS FOR. WHEN ANTIFREEZE/COOLANT BEGIN TO BOIL IT EXPANDS AND IT NEEDS A PLACE TO GO. THERE FOR IT GOES IN TO THE OVERFLOW/EXPANSION PACK. THIS PREVENTS DAMAGE TO THE ENGINE/RADIATOR AND OVERHEATING. THERE IS ALSO THE POSIBILITY OF A MALFUNCTIONING SENDING UNIT/GAUGE.
AnswerIs the system overfull?, Is your gauge working?I had the same problem and I had to replace the head gaskets.
Antifreeze has to be put in at the overflow bottle.
No
something.
in overflow jug
Engine is overheating.
Yes you can. When the car reaches a certain temperature it will suck it out. As a matter or fact most newer model cars they tell you to add it there.