The answer to 'shut-off valve making gurgling noise' is that a gurgling sound coming from a shut-off valve is often a sign of a problem with the valve or the plumbing system. This can be caused by a variety of issues, such as a partially closed valve, a blockage in the pipe, or a problem with the valve mechanism itself.
Some common causes of a gurgling shut-off valve include debris or mineral buildup in the valve, a worn-out valve seal, or a problem with the pipe or fixture it's connected to. The gurgling sound is typically caused by air being drawn into the system, which can indicate a leak or other issue.