they leak oil from the oil pump on the front of the engine
if your 1987 Nissan pickup leak water from manifold what do we do
Where is the leak originating from? Clarify location, whether it's a flange, hole in the piping, etc.
External or internal leak. If there is no apparent external leak and you see white smoke then you have a blown head gasket.
Freeze Out plug, cracked block or waterjacket.
Look and listen for a vacumn leak under the hood.
Could be a worn out waterpump.
Coolant leak? Check your heater core.
most likely worn output shaft bushing worn
Fuel leak.
Oil can either be burned, or it can leak
oil or tranny leak and dripping on exhaust
We need more info. Determine the source of the fuel leak then re-post the info.