Loss of coolant, Help please

Eastanglian87

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20 Jul 2012
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Hi there i have a lister stw3 which has been over heating at high revs over the last couple of weeks,
I have tried a few things thermostat, replaced pump as the old one was pretty knackered.
there has been no visable leaks,
Been down to boat today to fix another problem (unrelated to this one) But as i was running the engine i noticed coolant running out of the flywheel timing inspection hole on the bell housing.
Really dont know what this could be, Im going down tomorrow to take the engine to bits :-( (Unconfidently) Can anyone give any ideas or helpful advice....
Im thinking it could be something along the lines of maybe a crack in the cooling or water pipe? or a gasket , but i really have no idea what im looking for.

Thanks in advance
 
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