Sealey petrol engine camshaft sprocket holding tool renault belt drive sealey vse5734 renault 1 4 and 1 6 16v petrol engines require the sprockets to be free to turn if timing adjustments are necessary this bracket is used to hold the camshaft sprocket whilst releasing the centre bolts use in association with vs4960 sealey vse5734 petrol engine camshaft sprocket holding tool belt drive