1966 Ford 2000 3 cyl diesel spitting antifreeze

New water pump...new radiator...new thermostat (checked in hot water)
radiator filled just to cover fins
still spitting antifreeze by radiator overflow
much more than fluid expansion.
after 30 minutes blowing snow.

Any ideas ?

Thanks in advance

Fill it to the top and see if you get air bubbles when it runs. You may have a blown headgasket.

I would think that if it was the head gasket then it wouldn't take 30 minutes before it started spitting out anti-freeze.

Check the radiator cap and see if it is the right PSI ratings for your tractor.

There are no bubbles in radiator with engine running...
The cap was tested and tried a new tested cap...
tried running with cap loose...

many thanks to all for your replies...greatly appreciated


Bart

Either the radiator is blocked from snow? freezing up, thermostat sticking, thermostat not bleeding out air, water pump not pumping, radiator mostly plugged internally, or

You have engine problems... as others have said..
With the water just above the core or fins,, start it up with the cap off and watch the water.. after around 4 to 5 minutes, the water should start moving from the left side to the right side, indicating the thermostat opened and water is now flowing.


fill radiator to very top, let engine idle and watch for any bubbles for about 3 minutes.. water must stay at top of neck to correctly see bubbles. Then if no bubbles rev it up and back down.... look for bubbles for 3 minutes... water must stay at top of neck to see the bubbles... then run it at 2000 rpm for 3 minutes while watching for bubbles. water must stay at neck to correctly see bubbles.. any bubbles indicate red hot compression gasses leaking into the water jacket and venting back through the radiator. usually a blown head gasket, warped head, cracked head or block or if diesel, a cavitation pin hole.

Take a IR thermometer gun (about $19) and shoot top of radiator tank vs bottom of tank.... should see 140 to 190 at top but you need to see about 20 degrees of cooling between top tank and bottom tank. This is critical and the 20 degree drop shows first, the water pump is pumping water through both the engine and the radiator, air is flowing correctly through the radiator, and the radiator is not plugged and doing its job by cooling 20 degrees... If not... remove the thermostat and start over. rarely the water pump impeller can fail, but it pretty rare. Radiator can be full of sand, stop leak or many other things and need cleaning, rodding and boiled out. (does anyone "rod" any more?)


tractor should be warmed up and thermostat open... but if thermostat has the small pin hole, it will show bubbles cold.

Red his post again new radiator new thermostat new water pump. Next question did you install the thermostat yourself and did you install in backwards.

Keeping things simple, most of my tractors like antifreeze level about a inch + of space from the filler neck when cold. The old thermosiphons needed even more space for expansion.

It would be nice to hear how the problem was solved. Might help someone in the future.