My gearbox has a simple water cooled manifold connected to the sea water inlet before the strainer. Its mostly copper pipes with flanges. There has been some corrosion and there is now a leak which persists after patching. Obviously it needs a proper repair/rebuild. Not had any success in finding parts. Has anyone had experience of repairing this component?
From your last post I noticed you are not in a convenient place to have them re-made by an engineering company.. usually they would reuse the flanges and renew the piping. If the leak is in a straight piece, you might consider a DIY soldering solution, by cutting the bad piece out and use sleeves and replacement material to solder a new piece in, in situ or properly marked making sure the flanges line up again. "Only" things to source would be pipe material, sleeves and hard soldering..
Can you fit a generic oil cooler from another make?
I a thinking - if I cant patch the fitting again I could just re route sea water cooling pipe straight to the engine strainer and leave the gearbox without water cooling. I wonder how effective it is when its working properly