DeTomaso Mailing List: March 2000, Message #149

In a message dated 3/5/00 5:58:11 PM, mattwell@aa.net writes:

<< It looks like I'll now have to route both heater hose outlets through the 
2 water pump outlet fittings.The old stock pump routed fluid through the pump 
body,into the block outlet,with a plug on the lower of the 2 outlets. >>

If you look closely, both waterpump ports are inlets entering the same cavity 
in the pump. So, plumbed that way, there will be virtually no water flow thru 
the heater core. One heater hose (from below the console, just in front of 
the crank pulley) should be hooked to the block for hot water flowing TO the 
heater, the other for slightly cooler return water FROM the heater to the 
water pump, then to the block. This's why you can sometimes supplement an 
overheating radiator by turning on your heater & fan. I advise using the 
upper of the two outlets, as the lower boss on a Weiand 8209 is very thin and 
sometimes cracks when you really tighten a pipe fitting into it. Carefully 
plug the lower & screw a pipe bib into the upper. Don't forget your manual 
shut-off valves, either... Cheers- J DeRyke