The 'E' Type Forum

On the front of the SUs, where the air trumpets? bolt on, there are 4 holes but only 2 bolts go through; the other 2 holes lead in to the carburettor body. What is their purpose? Do the holes go all the way in to the carb body? Some sort of breathers?

They allow air under the pistons otherwise they would be operating (or not) in a vacuum.

Thanks David. Mine are blocked because sealant was used on the gasket which spread across the holes. Clear out job needed! Seemed to run ok though?