What could cause oil pressure to drop to 15psi or below at idle when hot?
Engine is a 350ci from mid 70s. Engine temp is about 180 degrees. At idle
the oil pressure drops to 15psi or below, engine runs rough and if left alone,
will stall. Please disregard the related car information below. Vehicle is a
1936 Chevrolet, 2 Door Coupe.