Help, help, help!
I have a 2 cylinder Kubota diesel
on my C&C
This overheated on my attempted crossing of the North Atlantic and resulted in my being becalmed on the George Bank for 6 weeks and then being hit by a hurricane
on the Grand Banks
. After that I was towed into Newfoundland
Anyway, during my stay in Newfoundland
I had the engine
totally rebuilt. New pistons, rings, big ends, crank reground, rebored, new valves, new fuel injector pump
, new injectors etc etc
On trials it was fine tied to the dock
but over heated withing 5 minutes of leaving the dock
. I put in a bigger heat exchanger
, 3 times the size of the original! Still over heated. I by-passed the exhaust
manifold and this has improved matters a little.
Now it is temperamental. sometimes it will o0ver heat after an hour, sometimes after two hours, sometimes after 3 hours. but it will always overheat at some point.
When it over heats its does so very quickly, fine one minute and 1/2 a minute later, whoosh up goes the gauge and it boils all the coolant
out of itself. I then let it cool down and re fill the system via the top of the thermostat housing (themostat has been removed) It will be fine for 1,2 or 3 hours whatever.
Before strting th3e engine
these days I always make sure the system is topped up via the thermostat housing.
The damn thing is fitted with an expansion tank with a new 7lb cap and a over flow bottle fitted below it.
Currently sitting here in Sydney Nova Scotia
but we will be setting sail to halifax
tomorrow or the next day and then onwards down to Florida
. So if I don't answer immediately, then you know we are sailing from A to B