What seal are you talking about? Need more detailed information. You may have a blown seal on your water pump. Check to see if any hoses are leaking. Check to see if any connectors are corroded or leaking.
It could be a head gasket or cracked head. With the engine cold, take the radiator cap off and crank the engine. If the head gasket is bad coolant should shoot out of the radiator. 12 inches to possibly hitting the hood.
Water is coolant!!! Pre mixed coolant comes with anti freeze and sometimes a rust inhibitor, other than that it does same job. Common sense being your guide. Do not use straight water during the winter. Varying ratios of water mixed to antifreeze will actually increase the boiling point in both winter and summer and is more benficial in summer in terms of cooling function. More Coolant/antifreeze less water (mixed) increases boiling point correspondingly. It is of greater benfit to use coolant/antifreeze in your engine because it prevents rust and corrosion in the various parts of cooling system and heating system (heater) and increases the boiling point. Check the coolant/antifreeze container for instructions on mixtures and learn from it.
Blown head gasket
you dont really need to us a gasket compound on your gasket thought i would put a little bit of black silicone on it. it can only help the seal
Run a compression test. When engines overheat the head(s) often warp causing the head gasket to blow. If you find low compression between any two cylinders OR if any of the sparkplugs are wet with water or coolant as you do the compression test, it's the head gasket and warped head. BTW, that's one of the most common problems that shows up after an engine has overheated.
cracked head or bad gasket
It would trash the engine bearings real quick. Antifreeze in the oil is a for sure engine getter. I just got done rebuilding a 98 350 vortec that had antifreeze in the oil do to the intake gasket leaking and all the engine bearings were trashed.
You either have a blown intake gasket or a blown head gasket.
If it is motor oil in the anti freeze, then it is either a cracked head, cracked engine block, or a head gasket blown. If it is transmission fluid in your antifreeze, then the radiator is leaking from the transmission cooler ----- although usually that would cause antifreeze to be in your transmission fluid.
A bad head gasket can do that or an engine oil cooler gone bad in the radiator. The year, make and model info would help.
NO NO NO you can i guess but it will ruin your engine. You either have a cracked block or blown head gasket i would guess. Moisture in the engine will destroy it. In addition to a headgasket or cracked block (unlikely), would be cracked cylinder head, intake manifold gasket or manifold. What kind of car, what size engine? 1999 CADILLAC DEVILLE
Blown head gasket.
maybe your head gasket
Head gasket Cracked head
You have either a blown head gasket or a cracked head. To determine if the head is cracked requires taking it off the engine and taking it to a machine shop and having it pressure checked. In an extreme case you could have an internal crack in the block but I would suspect the gasket and start there.
Blown head gasket or a cracked head. Do not drive this car. Serious engine damage will occur.
NO DO NOT DO THIS. A BLOWN HEAD GASKET WILL LEAK ANTIFREEZE. CAUSING THE ENGINE TO OVERHEAT. I AM NOT SURE HOW MUCH IT WILL COST TO BE DONE BY A PROFFESIONAL.