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In a message dated 1/6/2004 9:18:22 PM Central Standard Time, sqpilot@earthlink.net writes:
<< OK....I know the two -16 AN fittings on the radiator will go to the top and bottom large inlet/outlets on the water pump. That's when the water gets muddy....where might I make the connections for the expansion tank so that I can put water into this thing? I need to furnish a little more information. I am also planning on installing a heater core/fan combination in the cockpit for heat. I found that there is a 5/8" barbed heater core nipple underneath the oil filter. I had originally figured on using that to go to the heater core. There is another area for a fitting on the water pump. It is an angled fitting right next to the very bottom of the water pump where the large -16 hose will connect. See area labeled "connection 2" on the picture of the water pump. I had planned on using that for the other connection to the heater core. Finally, there is also another plug on the water pump labeled "connection 1" in the same picture. I have no idea what that is/was for. Any suggestions on how to incorporate a heater core and this expansion tank into my system? I planned on installing the expansion tank at the very top of the firewall, above the engine. Any and all suggestions are welcome and very much appreciated. Sorry for all the questions....I would much rather learn from "those that have gone before" than to make my own expensive and time-consuming mistakes. Maybe I'll do it right the first time? Thanks again for all of your assistance. Paul Conner >>
In my opinion, the port near the top of the pump won't be high enough to be effective for removing air. Just leave it plugged. Better an outlet on top of the "water out" fitting that bolts to the top of the pump. The port at the bottom of the water inlet will work for the return line from the heater.
I would not use the make up tank to fill the system. To get quick air pocket removal, you want expanding fluid volume to move air quickly to the make up tank, and that requires that the fluid line to the tank be of small diameter. The make up tank is filled to 1/3 with coolant. When the engine heats up trapped air is forced into the bottom of the tank and when any volume change occurs, only coolant can be returned to the system. It works like a charm. It works quicker with a swirl pot as shown, but it isn't required. I fill up by removing the top water hose at the engine and fill until water comes out of the engine. I then reattach the top hose, and add coolant to the bottle. This has been in my race cars since 1980, and is stolen from what was in stock RX-2s and RX-3s.
Lynn E. Hanover
Lynn-Cooling-System.jpg
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