Could someone help me trace the problem on my '94 mazda 626 FS engine. Small quantity of oil has been mixing with the water in the radiator. What seems to be the cause? Is the engine block cracked? Will the water in the radiator enter the engine or if the oil came from the oil cooler?

hope you got a response to this before mine. this sounds like you are close to a catastrophic failure. if oil gets to coolant, vice versa seems possible. i'm not a mechanic, but i would not drive until i had this sorted out. head gaskets might be a good suspect.