Pressure testing with an inert gas after the line is isolated from the supply
probly leaking at the y pipe coming off of the water pump it is adealer only part,its a steel pie that is leaking at crimp welds or a pin hole,its a common thig with wind stars
Cementing a well is either pumping cement into the drilled hole to decomission or plug up the hole, or to pump cement in between the casing (pipe) and the hole itself. This allows control of pressurized oil leaking from the hole.
it sounds like your exhaust manifold gaskets are leaking or you half a hole in your Y pipe
If it is leaking from the control, you should be able to access that from the front. If it is the supply lines or the pipe to the shower head, there may be access behind it in a closet. If not, you just have to cut a hole to get to it.
leaking core plug (freeze) behind flywheel
The alternator oil pipe on combo van leaking does feed the vacuum and the return pipe.
possibly the exhaust has a hole in it allowing the emmissions water which normal runs out of the tail pipe to run out rusted hole in muffler or exhaust pipe system. Does your truck bed have water in it from a recent rain storm ? The only other thing back there is the gas tank itself, but you would smell gas if that is leaking in liquid form.
If it is galv. pipe there could be a small hole on threads. You would have to replace pipe.
When repairing a leaking pipe, you need a plastic tube that is not leaking and with a mouth a little larger than the pipe you are replacing. No specific kind of tubing would be preferable over another type.
If it is leaking when you use the shower, not shutting off completely, it will need to be replaced. If it is leaking at the wall, take it off and reseal the thread on the pipe with either pipe dope or Teflon tape and reinstall.
If it is a sewer gas, you can detect it with a combustable gas detector.
The exhaust pipe was leaking.