MASSIVE PROBLEM
as soon as i turn my engine off the temperature skyrockets and the cooling system boils... it boils so badly that the car vibrates, its loud and the hoses shake... it also looses about 3 liters of water each time this happens which i refill as soon as it cools down.
it still runs perfectly cool, it doesn't even heat up when idling for extended periods.
The problem started after i got some headwork done...