Somibue

Okay so some of u have helped me out and thank you all for helping me . I own a 1987 rx 7 that day for 8 years I have done a lot of work to it and then ran into a problems with the heater core time after time I had radiator fluid on the floor . Well I found the problem and I don't know the name of the part and I will try my hardest to explain it . Okay so I need to know the name of the pat so I can get this baby on the road and enjoy it . I need to know the name of the part that pulls the pin out the motor so it opens up and the radiator fluid runs through my heater core the motors junk and froze up if anyone's knows drop me a line thanks guys