98 B4000 4x4 leaking coolant
Hello I recently purchased a used 1998 Mazda B4000 4x4 standard trany V6 4L that has just developed a coolant leak at the back of the motor above bell housing. there is some sort of sending unit at back of intake manifold just above the bell housing and the leak appears to be coming from this area. I can't get a good look because of the cramped area but I was wondering if there could be a frost plug in this area. I'm really hoping its not a head gasket or intake gasket problem. I haven't bothered with pressure test as I know antifreeze is leaking from the area where head , intake , and block meet on the back passenger side of engine, but you can't get in there with anything to see exactly what it is. I was hoping someone would be able to tell me if there were any frost plugs located on the back of the block above the bell housing. Ive even tryed to get a look using a video scope but even it hasn't helped as I am unable to get it into the area between the head and firewall to look up and forward. Anyway I guess its looking more like an intake gasket but may still be a head gasket either way it will be a total tear down to the block. leak is at the back on the passenger side of the block somewhere above the bell housing
There is a sensor of some sort mounted on to the block just above bell housing and just above it you have your intake manifold and head that all come together and its behind this sensor that its leaking this is a steady drip while motor is running so its not like I can drive it any where

truck never over heated it was fine one morning and not so fine the next
Any HElp Will Be Appreciated
Bill