Cooling tank size Isuzu 38

[theguitardoctor]

Can someone possibly clarify the size of the cooling tank for an Isuzu 38...?

 

I've tried the guy that bought up the Marinised Isuzu spares, but I can't get through to him. I believe that it should be 10sq ft to the canalside, but it's been measured at 5sq ft approximately.

 

Obviously, I understand the implications of a shortfall in terms of overheating etc, but can anyone confirm the actual specifications from Isuzu.....??

 

Cheers....!