The Original small block Chev 262, 283, 302, 305, 307, 350 and 400 all had the oil pressure sender under the distributor at the rear of the engine between the two valve covers.
oil pressure switch or knock sensor
PRETTY SURE OIL SENSOR
Could be the temp sensor..there could also be an oil pressure sensor at the top, back,or the block.
What year, and application? NEW ANSWER: That would be the knock sensor,
no, but its not a good idea to let oil get low
It's on the top rear side of the engine, near distributor.
Yes.
NO.
It is screwed into the top of the engine block RIGHT behind the distributor towards drivers side.
no
no
It is in front of the starter on my van.1990 350