New Water Pump New Problem

[spd4me]

Installed new Edelbrock 8843 Victor series water pump on my SA 396W. Drained off 11 qts fluid before and put 12 qts back. Warmed up to 180 degrees and thermostat opened and temp dropped and then started back up. Drove around block and temp went up to 220. When stopped it went to 250. Turned off motor could hear water boiling in top of head. Top radiator hose very hot while bottom very cool. Let engine cool down and checked water level, only took 1 cup of fluid. Bleed off fluid at temp sensor behind thermostat. 2 days later it did the same thing. Replaced thermostat and did the exact same thing. It's like the pump doesn't have an impellor in it or it has a counterclockwise and my motor is a clockwise. Any body have any suggestions?
Bob

[Jim Harding]

The 8843 pump has a clockwise rotation, same as the crankshaft.

Make sure you have 'burped' the system of air. An old trick is to drill an 1/8 inch hole in the thermostat flange (position it at 12 o'clock) to allow air to be forced out while the thermostat valve is still closed.

What was your reason to change pumps? If you are changing parts to correct a problem, maybe the problem is other than the pump. And, it's rare, but not impossible, to buy a bad pump, so don't rule that out. You already changed thermostats, so we can eliminate that as the problem.

Jim

[scott h]

still could be a bad t-stat, just because it's new doesn't mean it's good!

[weaver]

Make sure the thermo was installed in the right direction

[spd4me]

I drilled hole in thermostat. Installed like other one came out (portion with spring facing towards engine). The backplate on old one was leaking and it started squeaking. For the 2 heater hose connections, the top one loops back into the front side of the thermostat housing (right next to the large radiator hose) and the lower one is capped off. Everything is like it was originally. There is a very small area above the impellor that seems like it could hold some air. Does the top heater hose port in pump suck water from the connection next to thermostat and the lower one push water to heater? I hate to have to take pump off to see if anything is inside.

[pbrown]

There is only one heater hose attachment on a Ford water pump. It is the lower fitting. The upper fitting is a bypass hose and needs to connect to the small port on the stat housing. The secondheater hose connection is on the intake manifold right behind the thermostat.

Be sure the thermostat is facing the right direction. You can test its operation in some boiling water on the stove. Use a thermometer to see when it opens.