oil leak and oil light

[cjmoral]

well I just rebuilt my motor and am breaking it in and I went to change the oil and realized a little leak.I got underneath the car and it looks like it's leaking from the little black thing that connects to the oil pan.I also realized that they forgot to put in one of the oil pan bolts.I checked the pan and it didn't look like the pan was leaking.It's a real small leak but it's a brand new motor shouldn't be leaking at all.And also ever since I got my car back if I just turn the key to start it the low oil light comes on but if I turn the key wait a second until the lights go off it goes off what could it be.I called the guy and he gave me a bunch of b.s. reasons and ecuses but told me to bring it down and he'll fix it.I know bfor a fact he better put a bolt in the pan and he has to fix the leak I just want to get a heads up before I go down so I know what to tell him and also how to get that **************** oil light fixed he said he changed the oil light sensor could that be it or could it be a code that comes up and he just cleared it thanks for the help

[FANTA-Z]

Sounds like the low oil sensor is faulty, and also sounds like this is what your describing when you say the little black thing that connects to the oil pan. Its located on the driver side of the oil pan and goes directly into the side of it.