Join Date: Sep 2007
Location: US Midwest
Thanked 43 Times in 42 Posts
If the reservoir keeps going empty, you are losing coolant somewhere. I doubt it is due to a leaky reservoir. The radiator should stay full as long as it can pull coolant from the reservoir whenever the system cools down. Could be your new water pump is leaking or hose connection. Keep looking around the engine when its hot and when its cold.
As for the overheating problem, are both your cooling fans running when it gets hot? Have you ever changed the thermostat? It might not be opening all the way if its old.
2000 Accord SE I4 F23A1 Auto - Sold @174k miles & 10 years ownership
1998 Accord LX I4 F23A1 5 speed - sons DD in DC
1987 Accord LX 5 spd Owned for 17 years sold @155k
1986 Accord LX Auto Totaled @137k miles
1983 Accord LX 5 spd My Second Accord traded in
1978 Accord LX 5 spd My First Accord sold @ 100k