Volvo TAMD60C - Fresh Water level increasing

[superheat6k]

Having noticed for the last few runs a small qty of engine coolant in the bilge I have been looking for a leak on one of my TAMD60C's but can't find one. I have also notice the water levels have not been dropping to account to for the obvious loss.

However this morning I have found the stbd has filled its header to the brim.

Am I right to assume this must be due to a small leak at the seawater / freshwater heat exchanger ?

If so if this likely to be a simple O ring seal problem, the rubber gaiters that support the insert, or (and I hope not) a b*gg*red insert.

Any help on this one would be appreciated.

Is there a test to check for seawater in the fresh circuit ? With the toxic glycol present on the fresh I am reluctant to do the old fashioned taste test.

 

[volvopaul]

Is it on the engine that warms the hot water tank? If so I'd say your coil in the tank has split pressurising the engine cooling system. I doubt the sea water side would exchange sides as its running pressure is lower than the fresh water side.

 

[superheat6k]

No, it is the non calorifier engine.

I have removed the insert and found it is weeping when I fill it with vinegar.

So either a new insert or hopefully a repair at Wessex Radiators.

If the seawater pressure is higher than the freshwater pressure would this suggest partially blocked injection bend jets ?

Thanks