About this detail of the Tiger
The Tiger 1 had two large radiators for cooling the engine. They stood in the rear of the sponsons, one on each side.
These diagrams give the basic dimensions of the radiators. The connections for inlet and outlet pipes were on the rear side. There were two projections with four rubber feet on the front side.
The left-side radiator had a black filler cap on top.
The right-side radiator had a safety valve, facing forward. Therefore, when a Tiger's engine overheated, steam would appear from the large right-side grille on the engine deck.
The safety valve is numbered (13) on the Tiger Lubrication Chart. It is to be inspected every 2000 km.
These radiators are from the Bovington vehicle, in their original paint. The right-side radiator is painted black; the left-side one has the standard interior blue-grey colour. This may have been deliberately done to distinguish one kind of radiator from another. The grilles at front and back seem to be bare steel, but they are of course very dirty.
Like all other significant bolts on the Tiger, these on the front of the radiator have small bent pieces of metal attached beside them. This is to prevent them working loose.