This has been happening for a while, but I just remembered about it. after every oil change, I check my radiator levels, and my reservior tank is always empty. So I fill it back up to the Max level. My radiator is still full though. Then for the next couple of days, I get leaks on the ground. I know it is coming from the back area, cause I always think that I am leaking oil. Also, I am not overheating. My temp guage reads normal on my cluster.
So, what are some of the causes for this to happen? Is it just a simple matter of something being loose, are is there a major underlying cause to this situation. by the way, it is a 99 B18c1 OBD1 motor with type R tranny, and a del sol dual core radiator. I have never changed the thermostat on it either. I got the Swap in winter/spring of 2001, and it has always been like this.

TIA