I have a chrome plated,finned core radiator with the upper two mounting holes located adjacent to the sides of the radiator at 12.25″ centres. The lower hole is in the centre as normal. It has a Northern Radiators badge on the bottom marked D3051. Which model was it intended for ? I am trying to fit it to my 1948 Flyer.
The radiator you require has a matix size of 13.25 inches wide by 7.25 inches deep, with two top equally spaced mounting holes at 7.25 inch centres, and one central mounting hole at the very bottom.
Two tips if I may:
Thread the three mounting points so the through-studs srew in and are rigid at right-angles. This relieves the stresses impossed upon the matrix, and “earth” the radiator to the frame, which helps reduce furring-up.
And.. when tightening the nuts on the through-studs, do not overtighten. Slowly tighten whilst making sure that you can turn the rubber washers and cup washers between thumb and forefinger. When you find that you cannot turn them stop tightening the nuts. Do not squash the rubber washers at all. Check occasionally as the rubbers will bed in against the radiator core.
My previous measurement of 7 3/4″ was incorrect, I’d tried to measure it on the bike. The actual measurement between centres is 7 1/2″ taken from four radiators not on bikes.
Where did you get your 7.25″ from Stan?
Why not just make a new longer plate that goes in between the rad and the frame instead of the original one.solves all the problems.at least you have got bolt holes, ive had two with no top bolt holes in.both had plates on saying London Radiators.
Checked on two new original Ex-Holder unused radiators I have – and you are correct, the measurement is 7.5 inches, yet the rad I measured first which came with the bike which is off for re-plating is 7.25 inches!!!
I think that by 1948 the limit guages must have been worn out.
Spoke to Northern Radiators some while back – and I recall they said the rads as supplied to Scotts at Shipley were three pounds seven and sixpence each. Happy Days!!