Cracked head would be my guess. Early in the days of my Ford rebuilding, I bought a non-running 4000 (800 later series) and noticed a crack in the head.
I went to a Ford restoration shop/dealer and had a conversation with a machinist while I was buying a rebuilt head. The guy said that that engine had cracked head problems and it was good business for him.
He would drill holes in the crack and drive in lead sticks, about the size of regular spaghetti adjacent to one another and fix it.
I bought one of his heads and had no further problems.
So, white is water/condensation/running cool and I'd just assume you had a cracked head.
If you pull the radiator cap and rev it up you would normally see bubbles in the tank if it were.
Same-Day Shipping! Most of our stocked parts ship the same day you order (M-F). Expedited shipping available, just call! Most prices for parts and manuals are below our competitors. Compare our super low shipping rates! We have the parts you need to repair your tractor. We are a Company you can trust and have generous return policies! Shop Online Today or call our friendly sales staff toll free (800) 853-2651. [ More Info ]
TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.