Car radiator I assume? Older ones can be soldered as you would a copper pipe. Newer ones you can use stop leak that you put into the radiator. For a pin hole that usually works. I would use either Silversolder, comes in a tube and is a silver or copper colored powder or Liquid Glas that has a lot of suppliers. Comes in a bottle or can and separates out on the shelf to a clear liquid with copper in the bottom. Follow the instructions and this will fix almost any leak in the system even a head gasket if it is leaking into the exhaust.
For a temporary repair, yes and use as directed.
Blop is the answer
Blop is the answer
You have a hole in the cooling system, possibly a pin hole in a radiator hose.
Cut out the section with the pin hole and use a compression union
One of the first cameras ever created was a pin hole camera. It was a box completely sealed with just one tiny pin hole on the front of it to allow exposure.
I just ran into this problem. The petcock is plastic and has a metal pin protruding thru the side. This pin rides in a "track" and locks the petcock into place when you put it back in. I broke the pin removing the petcock and had to remove the radiator to repair it. You may be able to do this with the radiator in place. See if you can feel the track and if you replace the pin, you will feel it lock into place when you reinstall the petcock. The pin can only protrude on one side of the petcock so that the petcock will seat correctly. Good luck.
00 Jeep Grand Cherokee, measurement of caliper from pin hole to pin hole.
I've done that with epoxy on a few occasions.
The head rest can be removed by inserting a small pin in the hole on the clip that does not have a button. Push the pin in that hole and lift on the headrest. You can also remove the plastic cover and just push the button.
push pin in hole in plastic on bottom of head rest bar.
Pin-hole cameras are very tiny cameras that are designed to be difficult to spot. The name comes from the fact that they only need a "pin-hole" to see through.