Foxfloat,
Looks like there is a piston and sleave that you are going to have to order.
Next time, after repairs, get a temp gun for your engine.
Duratrax is the brand namee, Flash piont is the name of the gun or infrared temp gauge.
Get a owners manual for the car and learn how to set the temp of the engine.
Most engines run well at 200-215 degrees. 250 dgrees is too hot usually.
Good luck[8D]