flow kooler water pumps!!

[Blix]

Larger doesn't always mean better. If it flows water/coolant too fast, it doesn't have time to dwell and pick up heat. I don't know what you have or experience with exactly what you're describing, I'm speaking in general terms of heat transfer.

It's a good point Ecksjay, I should have elaborated. I doubt that it was an intentional restriction to slow down the flow, if it was it was a horrible place to put a restriction. You never want to restrict a cooling system at the inlet side. If you do then that means that you are creating a huge pressure drop right in an area that is already at the lowest pressure of the whole system. That means you could be taking an area that normally would be a bit below 14 psi (or whatever your system is set at) because of the "suction" of the pump, and then by the restriction dropping that pressure a few psi. So not only will it boil at a lower temp, it will boil right at the inlet to the pump and cause the pump to cavitate. Not good.

I am going to bring both pumps to work tonight and weld up a plate to the first pump, modeled after the Flowkooler. I'll take pictures and post them tonight/tomorrow, and I'll include a bit more of a write up about it.

Oh and I forgot to add; there is a small area on the flowkooler pump that is ground down, it looks like an area where a part number would be. I wonder if they just take someone else's pump housing and a stock impeller to make their pump.

 

[Blix]

I was going to post pictures, but evidently I have never posted pictures to a forum before. I have to host them somewhere else? That sucks. Where should I do that?

 

[Warlock1]

As others have mentioned, the Flowcooler pumps are nothing more than stock pumps with the part numbers ground off and a plate riveted on the impeller. As a matter of fact, they sell the metal disc/ rivet kit separately, at least they used to. A "do it yourself " version. It was about $15 About 3 years ago.

 

[Maltese Chief]

I installed a FlowKooler water pump today, no problems.

I was very happy to see that they switched from rivets to welds.
I was concerned about buying one because of the rivets, but
several reputable members seemed to like them anyway.

Using the Indian Head gasket treatment made it very easy and leak-free.

I also installed a new thermostat, and hoses.
I used a Jegs inline filler and thermo-cap too.

 

[Alaskan89XJ]

Small hijack.., Maltese.., how about more information on what 'T' you used, i.e., type, where to purchase, etc, and "model-number" of temp. rad. cap you used into that 'T'? What year is your XJ?
Thanks

 

[clean4drxj]

Huh.. So I could just get a OE pump and slap that on the impeller and now I got a Flow Cooler lol

but you wouldn't be getting the warranty..

 

[praetorian]

Hey what did you do to plug the overflow outlet?

I used a Jegs inline filler and thermo-cap too.

 

[Maltese Chief]

Small hijack.., Maltese.., how about more information on what 'T' you used, i.e., type, where to purchase, etc, and "model-number" of temp. rad. cap you used into that 'T'? What year is your XJ?
Thanks

1989 Limited, 4.0, auto, NP242. Closed cooling system.
The thermocap is just for a secondary fill location
and as a backup to the dash temp guage.

Jegs #555-53040 INLINE FILL 1.25X1.25"CLR

Jegs #720-2471S Mr. Gasket ThermoCap Radiator Caps 16 psi

I used a 1/8 brass fitting and plug from NAPA to plug the overflow hole and to use as a bleeder.

Drove it to work today and it's running great. Never got above 205 or so, and mostly stayed about 190 on highway.

I'm ready to tow my boat again!