Volvo MD11C

[Swanrad2]

Hi,
We have rebuilt our Volvo MD11C and converted it to fresh water cooling over the winter. When running under load for the first time yesterday after launch she was holding steady at around 75 degrees at the thermostat and about 65degrees at the output of the heat exchanger. Happy enough but about 10 degrees warmer than we were hoping for. Would increasing the water inlet pipe diameter signifianctly increase the volume of water flowing through the exchanger and increase cooling - we still have the old gun metal strainer and skin fitting, an upgrade wouldnt hurt but will wait until next winter unless we expect it it to have a significant cooling effect?
Thanks

 

[VicS]

Hi,
We have rebuilt our Volvo MD11C and converted it to fresh water cooling over the winter. When running under load for the first time yesterday after launch she was holding steady at around 75 degrees at the thermostat and about 65degrees at the output of the heat exchanger. Happy enough but about 10 degrees warmer than we were hoping for. Would increasing the water inlet pipe diameter signifianctly increase the volume of water flowing through the exchanger and increase cooling - we still have the old gun metal strainer and skin fitting, an upgrade wouldnt hurt but will wait until next winter unless we expect it it to have a significant cooling effect?
Thanks

75 C is about right for the engine temperature as that corresponds to the thermostat opening temp for fresh water cooling.

65 C is presumably the temp of the coolant leaving the HE but what was the temp of the cooling water leaving ? Maybe if the water flow flow was increased it would be lower. All hoses clear and presumably new anyway?

Water injection into the exhaust bend unobstructed ?

Gearbox cooler not obstructing the flow? ( I assume that is still raw water cooled)

 

[mogmog2]

Hi,
We have rebuilt our Volvo MD11C and converted it to fresh water cooling over the winter.

Hi, would you share any info on this process?
Many thanks

 

[pvb]

When running under load for the first time yesterday after launch she was holding steady at around 75 degrees at the thermostat and about 65degrees at the output of the heat exchanger. Happy enough but about 10 degrees warmer than we were hoping for.

Those temperatures are fine, as VicS has said the thermostat for fresh water cooling should open at about 75 degrees. Why were you hoping it would run cooler?