Have a 1700 Ford, just had head reworked (cracked). Used it first time since repair for about three hrs, temp stayed just right, ran ok no probelms. Started it up the next day and water was shooting out the exhaust. I stopped it checked the water level and had to add about 16oz. The tractor started and ran OK for about 45 minuted w/no problem. Do I still have a problem? Any advise would be appreciated.