Waterincarenginecrankcase - Cars & Trucks

Water or Engine Coolant ?
Engine coolant i presume (water is a whole different ball game)
Coolant enters the crankcase for a couple of reasons:
1. Headgasket - blown from age or head warpage from severe overheating (check for cause of overheating)
2. Crack in cooling jacket in the engine block or cylinder head etc.
3. Intake gasket leak at coolant passage

#3 is the simpilest - however it definately needs to get fixed before it destroys the rest of the engine.

Let me know if this helps
Thanks