43GXi-Q Volvo V6

by Mark
(new zealand)

main cooling hose from thermostat housing is rupturing, done it twice now and have replaced pick up pump and circulation pump and all hoses, how is the pressure getting so high to blow the main large hose, it's not blowing the hose off the fitting it's exploding the hose so there must be a lot of pressure in the cooling system, this is not a closed circuit its all sea water system

cheers
Mark

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