i have a 1990 yota with a 94 yota motor in it and for the past 3 weeks its been leakin water and like every week i have to fill it back up with water. and ive checked the oil for water and there isnt any water in the oil so i dont think its a blown head gasket does any have any ideas.  

PRESSURE WASH ENGINE AND GET ALL THE COOLANT HOSED OFF GET A RADIATOR PRESSURE TESTER AND HOOK IT UP TO THE RADIATOR AND PUMP PRESSURE TO IT AND SEE IF THE PRESSURE LEAKS DOWN. LOOK OVER EVERY NOOK AND CRANNY AND YOU SHOULD SPOT THE LEAK.  

when those 94 yota engines water pumps leak their pretty hard to find. look at the front of the block on the drivers side. just above the oil pan there is a small weep hole there check it out. when it leaks it can be hard to see as it drops off the block with little to no signs