If it isn't leaking out then it is burning it, HOWEVER, it may be leaking out so slight and burning off that you aren't seeing it leak. check your exhaust for a sweet smell or white smoke or dripping out sweet smelling fluid, then check your oil for traces of anti-freeze if either are evident do a compression test and my bet would be that one or even two cylinders are really low wich would mean that you have a cracked head or a bad head gasket ==New Answer Headline == I had a 1992 Caravan with the same problem. It turned out to be a small crossover hose underneath the intake manifold that had a pinhole leak. It just blew out onto the engine and burned off and/or evaporated over time. ==New Answer Headline == I also have a 1998 Caravan w/ 3.0L that leaked from the water pipe crossover. Was able to get a replacement from local junk yard for about 5 bucks. Had to completely disassemble top of engine (intake manifold, etc) to replace; but was relatively easy. Since then water pump has gone out. Not looking forward to having to do that. If anyone has any tips for that job would be much appreciated.
Its a strong indication of a blown head gasket
You may have blown a head gasket, check you oil to see if the antifreeze is leaking into there.
If losing anti freeze but not visible leaking typically means bad head gasket. Antifreeze is leaking into combustion cylinder and therefore evaporating and going out exhaust pipe as steam.
Sounds like a leak.
That is the correct spelling of "leaking" (losing fluid or pressure).
That is because it is hot ( over heating ). You need to check all 4 corners of the intake manifold with your fingers to see if it is leaking antifreeze. Chevy had a problem with the intakes leaking engine coolant. There is a heater hose fitting screewed into the left rear corner of the intake and thay are none for leaking engine coolant too. You should check the water pump for leaks too.
Your gaskets are leaking and you are leaking antifreeze inside the manifold. Same thing happened to me on my silhouette and cutlass. The problem is the orange anti-freeze eats the gaskets. Will cost $2,000-to-$3,000 to fix. Sorry!
If it is not leaking externally then it is leaking internally. The intake manifold gaskets are known to leak coolant into the engine on that vehicle. Have a trusted mechanic diagnose the problem soon because coolant mixing with engine (even in small amounts) oil will cause big trouble down the road.
Could be oil mixing with antifreeze indicating a bad head gasket Are you losing motor oil?
Could be a leaking head gasket - try running engine to normal operating temperature remove oil dipstick and let a drop fall onto hot part of engine - oil will smoke coolant will sizzle
check your oil to see if you have coolant in it. if you do your intake gasket needs changed.
could have a crack in it that is leaking under pressure