Leaking calorifier -- is it busted? (pics)

[shoc]

See pic below of leak from calorifier, it leaks when its pressurised, even when it hasn't heated up.

The leak is coming from the threaded port in the middle of the tank, see screwdriver rested on the spot to mark it. Nothing has ever been screwed in at that spot, not even sure of its purpose.

Can it be repaired?

 

[robertj]

Could you screw in a plug black with ptfe?

 

[Ducgas]

Double check the joint above as it looks like it could have been leaking? If it's not that joint leaking I would also consider a brass plug and Ptfe....

 

[superheat6k]

Double check the joint above as it looks like it could have been leaking? If it's not that joint leaking I would also consider a brass plug and Ptfe....

+1 - looks very much like the fitting above is leaking - the green verdigris above literally appears to be wet. These are the hoses from the engine cooling circuit, so if fresh water cooled is it very sweet (engine coolant), or if raw water cooled is it salty - this would confirm it is coolant rather than a leak from the calorifier tank itself. I expect the treaded hole is for a temperature sensor.

It could be that the fitting from the coolant circuit is leaking where it passes into the freshwater side of the tank. Drain and strips and seal everything with Loctite 577 and PTFE tape.

 

[shoc]

+1 - looks very much like the fitting above is leaking - the green verdigris above literally appears to be wet. These are the hoses from the engine cooling circuit, so if fresh water cooled is it very sweet (engine coolant), or if raw water cooled is it salty - this would confirm it is coolant rather than a leak from the calorifier tank itself. I expect the treaded hole is for a temperature sensor.

It could be that the fitting from the coolant circuit is leaking where it passes into the freshwater side of the tank. Drain and strips and seal everything with Loctite 577 and PTFE tape.

Its raw water cooled.
I've been monitoring the coolant circuit fitting but its not leaking on this occasion but was at some point with the green stains.

I'll try the plug with ptfe and see how it goes, thanks for the advice, I wanted to check this out before messing about with a pressurised tank

 

[simonfraser]

likely need a deep socket to get that top black hose fitting off, be worth sourcing one to save on the hassle and knuckles.

 

[tillergirl]

Nothing has ever been screwed in at that spot, not even sure of its purpose

It looks quite like the place for an anode. Some tanks need an anode. On mine (it's an annual service item), the zinc bit screws into a brass 'plug' that then screws in the socket like the empty one that you have. Perhaps?

 

[PCUK]

The tank isn't actually pressurised (you can't compress a liquid) so no danger there.