Hot for water
AIf you have any boating related query, then our team of experts on all things boating are here to answer it EMAIL: firstname.lastname@example.org WRITE TO I have a Rinai gas water heater which is no longer working and would like to fit a calorifier to replace it. Where and how do I fit the pipes to the engine?
If this is a direct raw water cooled engine things are more complicated, but assuming that it is heat exchanger or keel/tank cooled, this is a photo of a BMC 2.5 (and I know the BMC 2.2 is very similar); both are likely to have been designated Commander.
The arrow on the photo shows the position of the hot take off that runs to the calorifier. Your engine should have a hexagon headed plug behind the right-hand side of the rocker cover. This has to be removed and a pipe adaptor fitted that matches the thread.
The return from the calorifier goes into the hose that is fitted to the engine water pump. This could be quite short or even an elbow. Often you can find hoses from older cars that have the required T joint moulded in that can be cut to fit.
The cold return can go anywhere in the pipe that returns from the heat exchanger or keel cooler to the engine water pump.
Canal Boat Magazine, Archant Specialist, Evolution House, 2-6 Easthampstead Road, Wokingham, RG40 2EG