i have a sr in a s13 it runs at normal operating temp but when i turn it off it sometimes starts bubbling out if the resivior idk y it does it the only thing i can think of is there is a hot spot in the motor that is bobbling the water and it is coming out of the resivior
temps usally rise when the car is turned off because the coolant is no longer running through the motor. but if you turn it off at 190 the temp should not rise high enough for it to boil over. what is your cooling setup?
make sure theres no air bubbles in the rad ...its used to happen to my last sr with a koyo and its cuz i didnt get all the air out when flushing the rad