29 d radiator

[keitherb]

In the process of restoring my 29 d but the radiator thing puzzles me. online I see it holds 12 gallons or so and they talk about air pockets and such. After flushing clean water through it a few times it appears water was still inside the block because I could only get 8 gallons of antifreeze in with a couple inches left at top of radiator for expansion. It was a 50/50 premix and after asking ai why it is only good to neg. 10 degrees {after running the engine for five minutes to mix and coolng overnite} they said it would take 2.3 gallons of water to bring it up to that temp. That is still only 10.3 gallons total. Any help on this woul be appreciated.

 

[Fixingfarmer]

I can’t imagine what would need to bubble it’s a pretty wide open system. Does yours have a drain port at the bottom of the head like the row crop tractors? It’s also a 29 so it could very well be smaller radiator than what came later but that pipe plug down there should be where to drain everything I’ve even tried putting a valve there. If you drained anywhere else you could have left it in the block

 

[keitherb]

thanks for the reply. The drain is underneath the block and a small pipe plug below the left side spark plug also allows for venting while trying to get all the water out. Who knows

 

[Fixingfarmer]

One other thing I’ve done before I forgot to mention is run it awhile in your case a couple hours probably since there’s no thermostat or water pump it will take awhile hopefully you have a task for it.

drain it into a clean tub and then test it’s freeze point (I use a refractometer but there are cheaper ways)

If it doesn’t I add a jug of straight and stir it with the stick then check it again and put it back

Just got a tractor back from Oklahoma where I had to do this it was only mixed to —15 and even though I had just put new coolant in while I added the block heater it tested -25 when I was done so then it got another shot

But that had a cab with heater lines water pump and a thermostat goofy surge tank I wasn’t confident I was getting a reading of the actual sample in the block (but should have been a lower freeze point and still was too high) and way more places for coolant to hide

 

[Mark-Ia]

The plug on the left side of the block is not for a vent when filling the radiator. The small pipe plug on the left side of the block is for a elbow that the water injector tube and valve fastens to. Evidently you don't have the water valve.