Cooling system capacity

[66furys]

I have been flushing and filling my mud filled system for almost a year. Normallly I get out about two plus gallons. Recently I pulled one block drain plug and got out two quarts. I did not pull the passenger side since the drive side was clean. But, in refill, I went to the manual that says 17 quarts for non AC 66 fury with big block. I see one user here says 9 quarts...not clear on application. But, I just filled after draining one side of the block and it only took 2.5 gal of coolant. I thought that after the block drain would have been bit more. I have no idea about the heater core....prob half full?? The new radiator is the Summit OEM copper, large and three tube. So, I only got one gallon of glycol in and will measure the coolant later. But, curious what others have found on volume at refill. Thanks.

 

[CBODY67]

On our '66 Newport and other factory a/c Chryslers and Dodges we have, when doing the annual coolant change, flushing the system and then letting the radiator drain, I usually could get 2 gallons in the radiator, then water with the rest. Which resulted in the -20degrees F spec. I later dicovered that I could get 9 qt in it to get the spec down to -34degrees F protection. With the factory a/c system, that 9 qts was right at 1/2 of the total system capacity. Heater cores usually hold about 1 qt of coolant.

The service manual, and possibly the owner's manual, has the total capacity specs for your system. All of our cars were 26" radiators.

On my '67 Newport, after I originally got it, I was doing a full flush of the system. I decided to flush the heater core by itself. I did it in the normal flow direction and things came out pretty clean quickly. Then I decided to do a "reverse flush" of irt, which I should have not done. Apparently some accumulation did not like that and proceeded to plug the whole thing up. No water flow either way, then. FWIW

Enjoy!
CBODY67