Cooling system question

[Flysooner9]

So I took my 2001 GTX DI to the lake today to test some work I’d done on the jet pump. I had the jet pump bolted on but not the steering shroud. Just needed to run it for a bit and didn’t want to mess with the hose and also keep the bearing cooled.

anyway after a while and a little revs I got the high temp warning. When I got home I pulled some of the water lines and they seemed very dry. I blew some compressed air through the intake hose and I had air blowing out of the water exit. So It doesn’t seem to be clogged.

all that for this question. Does the steering shroud need to be on in order to get water to flow up into the intake holes?

 

[Flysooner9]

Small correction, it’s a RFI not a DI

 

[mikidymac]

You don’t need the steering nozzle but you do need the reduction nozzle.

Also make sure the o-rings are installed between the pump and the shoe.

 

[Flysooner9]

Ok I didn’t have the reduction nozzle on either. Just the pump itself. Hopefully that’s all the problem is.

 

[mikidymac]

Yes, that will cause it since there is no pressure in the pump to force water into the cooling system. You need the constriction of the reduction nozzle.