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Overview Reference Workspace MGB Donor Parts Chassis Front Suspension Rear Suspension Steering Braking System Engine Transmission Fuel System Cooling System Bodywork Wings Bonnet Wheels & Hubs Electrical System Dashboard Lighting Painting Interior & Seats SVA & Registration Hood & Screens |
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12. Cooling SystemThe cooling system has grown in little bits along the way, starting with the water pump and thermostat which were included with the reconditioned engine. I opted for an electrically operated cooling fan for better efficiency. NG supply a tailor made radiator together with hoses and an electic fan and switch if required. It was not possible to fit the radiator, however, until the mounting brackets were obtained (included with the body kit).Thermostat HousingThere is more than one type of thermostat housing and I, of course, had the wrong one. Mine was curved and directed the water towards the left (nearside) of the car but the correct one (part no. 12H797) is slightly angled and delivers the water towards the right (offside - see photo).Heater)
A new heater valve and
water return pipe were fitted (both are standard MGB items). A hose
carries the (hot) water from the heater valve to the heater unit and another
carries it back to the return pipe and thus on to the water pump.The heater unit itself needed renovation and modification. When I dismantled it I found various bits of disintegrating foam and evidence that the heater matrix may have been leaking. Not wanting to risk using it under pressure I purchased a new matrix together with all the various seals. After painting and re-assembly the heater was ready to be fitted to the body. The heater vents were fitted later (about the same time as the dashboard) so that I could experiment where to position them. I also modified the heater outlet to enable the vent hoses to fit on properly. Radiator)
There are 4 radiator brackets supplied with the body kit. The two inner ones
are straight, fitted as extensions to the two brackets on the
chassis. The two outer ones are cranked to offset the radiator left to
clear the steering column (mine needed some
modification). The
radiator cowl (nose) is fitted by being sandwiched between the inner
and outer brackets.The hoses were made up from a long bottom hose which was supplied by NG. I am not sure what vehicle it was meant for but it doesn't look like an MGB one! I also added a piece of rubber pipe to the overflow outlet to cleanly carry away any excess coolant. The system was filled with coolant (33% anti-freeze mix) before the engine was started. The capacity was 6.0 litres including a small top up after the engine had run.
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