Posted by RodInNS on November 12, 2015 at 15:18:38 from (206.123.28.58):
In Reply to: Ford 4600 head gasket? posted by leviskuse on November 12, 2015 at 09:30:25:
First off.... did you check the oil that morning before you checked the coolant? Was there oil in the coolant at that point in time or only after you added the gallon? If there was, and you ran it that way the day before... then the bearings are toast already... As far as the coolant disappearance goes... there is an off chance it could be one of the internal core plugs in the top of the head. Sometimes they do rot out. Worth looking given the volume of coolant gone missing. Other possibility, which those engines are well known for... is a pinholed/perforated cylinder wall. A bad head gasket is certainly possible.... but given the nature of that engine I find most will pressurize the cooling system and push the coolant out the top if they burn the fire ring in the gasket. The odd one will dump to a main gallery but not too often.... So... at this point I'd probably pull the rocker cover and have a look in there and see if a core plug is bad. In seeing nothing, then I'd pull the oil pan for an inspection down there... and refill the cooling system and pressurize it if necessary to see if the coolant is coming down the cylinder wall or down a gallery drain.
In terms of fueling.... one would be wise to leave the pump alone on a 4600. It was already a fairly high spec for it's displacement and the tractor has none too much rad to cope with any 'extra' snort. I don't believe for a second that it has anything to do with your present situation... but it will some day lead to a good cooking if you're not very vigilant... and probably cracked pistons or broken rings if you really push it too much.
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