I have a 1998 Chevy Malibu that is need of repair but I do not know where to start, for weeks the temp gauge would go up as if it was overheating then just as fast as it would go up it would go back down to normal level, I filled it with antifreeze and it was still doing it and know it is leaking coolant and it is looking like it is coming from the block right behind the belt. Any ideas as to what might be going on would be very helpful.
