IC pump location

[Lynn D. Brown]

Damn, guys, I just saw a writeup on this within the last few weeks and now couldn't find it thru 4 pages of Engine Tech.

Does the lower IC pump pump into or suck out of the lower IC radiator ?
The flow has to go from the bottom connection on the Upper IC to the lower Rad and then back to the upper IC top connection - right ?

So does it go to the suction side of the IC pump before or after the lower radiator ? I am thinking that it goes to the pump 1st and then the Rad - correct ?

I also just noticed the someone said their Shurflow puts our 2.8 GPM @ 45 Psig. I doubt that there are pressures like that in this recirculating loop. The little pressure cap on the Upper IC is only rated for what - 10-15 Psig ? The pump will of course put out whatever pressure it needs.

 

[TYRODD]

You may have heard about the Shurflo specs from me. I dont believe that there is any "pressure" present in the Upper IC as you can run the pump with the cap off w/out the resevoir overflowing. Also the coolant is being pumped out of the resevoir as fast as it is being pumped in. The only real pressure present in the IC would be from the temperature of the coolant.

I do agree that our system is too restrictive to be able to flow as much as the pump can. But that restriction (in the heat exchangers) also allows for good heat transfer, just like the "somewhat" restrictve (airflow) stock upper IC actually tranfers heat well.

The pressure ratings of the Shurflo are based on a closed system (like an RV's water system).

 

[TYRODD]

Oh sorry, I didnt help your question.

I believe the flow of the stock system is like this: bottom nipple of Upper IC to pump (suction side) to bottom of CCHE then out of top nipple on CCHE to top nipple of Upper IC...I think.

This would allow the system to rid itself of any air bubbles.