Reply to "Help Needed - Cooling System problems"

...Looks to me as if the CAP on the 'Swirl' Tank is Dumping Coolant Too Soon!
The Cap should have a Pressure Rating of AT LEAST 16 Pounds!

If Your System can,t Hold the Pressure it will surely Overheat, this especially Includes ANY seepage Past the Hose Ends!!
Also Be absolutely Sure that Your Fans are turning in the Correct Direction!
It's Easy to get One or Both Wrong! And I have Both of Mine wired through Relays DIRECTLY from the Battery!!

Next, the coolant must be EXACTLY a 50/50 Ratio Solution, this raises the 'Boiling Point' to Over 230 Degrees F. The Difference is 'Night and Day', as far as Cooling. Anything less and Your right on the Edge of Overheating.

Last; is the 'By-Pass Restrictor Plate' installed under the Thermostat? I know You wrote that You did Not have this Problem in the Beginning, We are just 'covering All the Bases'!

If I think of anything else, I will add it Later.

Good-Luck with It!