Testing the aux water pump

[Blueberryyum02]

Is there a way to see if the auxiliary water pump is coming on. While bleeding the system I notice that at idle with the system closed up and the heater bleeder screw out I barly get a trickle of coolant out, of it. Even when I apply gas and raise the RPM it looks as if it's sucking inward instead of pushing coolant out.

I guess I did the bleed procedure right, I followed the direction as best describe. All coolant tubing is brand new, hoses etc. the only thing I didn't change out is the degassing bottle. The car is not over heating i have heat,
I just can't seem to get the stream of coolant out of the heater bleed,

The procedure that's posted is very shallow on what to do,but I expect that from the manufacture, as they want you to go to the dealer and hook it up to the machine and charge you life support and heart transplant money.

I checked the red wire with yellow stripe and I'm getting voltage on that wire. Just trying to narrow this thing down. And the stealership is not a option, cause I'm not shy at getting my hands dirty turning wrench.
Any and all help or suggestions will be gratefully appreciated.

 

[RigsLS]

You talking about the "Auxiliary Coolant Flow Pump" ?
I suppose you could take it out and bench test it, put 12V to it and see if it will suck water from one cup to another.

http://www.lincolnvscadillac.com/fo...p-Re-OEM-Auxiliary-Coolant-Flow-Pump-GEN-1-V8

Aux pump is actually only used for pushing the flow of coolant through to the interior heater core during low idle.



For the system to function correctly it will need to maintain pressure within the entire cooling system,
you sure there are no crack in the degas bottle or bad cap? They always develop hairline cracks in a near impossible side to see unless it's out.

 

[joegr]

The whole system has to pressurize for the bleed procedure to work. The aux pump is not involved in pressurizing the system. Heating of the coolant causes pressurization, unless there are leaks in the system. (Often these will be air leaks instead of coolant leaks.)