I have an issue with my overflow tank. The “nozzle” nearest the camera in the photo (the smallest) came away when I removed the hose. I have temporary stuck it back in.
I was going to buy a replacement tank, but apparently, they are no longer available, so I need to repair it.
When I started up the engine, water did soon leak from this joint, so it does need a reasonable repair.
My current plan is to get one of these:
https://rc.supplies/products/aluminium-threaded-radiator-overflow-stub?_pos=1&_sid=0598e6277&_ss=r
I am also getting the matching boss/ferule.
I was thinking I could wind the stub into the hole in the tank. I was hoping to use the boss on the inside, to use to tighten the joint, with a rubber o’ring to help seal.
But looking at the tank, the nozzle is a long way from the screw top, and there is also a baffle just inside the nozzle.
So, I am thinking:
I was going to buy a replacement tank, but apparently, they are no longer available, so I need to repair it.
When I started up the engine, water did soon leak from this joint, so it does need a reasonable repair.
My current plan is to get one of these:
https://rc.supplies/products/aluminium-threaded-radiator-overflow-stub?_pos=1&_sid=0598e6277&_ss=r
I am also getting the matching boss/ferule.
I was thinking I could wind the stub into the hole in the tank. I was hoping to use the boss on the inside, to use to tighten the joint, with a rubber o’ring to help seal.
But looking at the tank, the nozzle is a long way from the screw top, and there is also a baffle just inside the nozzle.
So, I am thinking:
- I rough up the exterior surface of the tank
- I screw the stub into the hole, with some good quality gasket sealant on the threads
- I put some JBWeld around the exterior, in the join between the tank and the stub.
- Is there another/better approach?
- I am assuming it is a pressurized system, is that correct. If so, the best I can do is keep coolant in tank just on Minimum to avoid excess pressure.