Vintage Austin Services Engineering services for pre war Austin Sevens Vintage Austin Services 1928 Austin Chummy 1928 Chummy Repair to Austin Seven Crankcases (coil engines only). Austin Seven "nose piece" It is not uncommon to find that the section of the crankcase that locates the front main bearings has broken. We provide a repair service which returns the crankcase to a fully useable state Austin Seven crank case Austin Seven crank case The Austin Seven Engine: The Austin Seven was fitted with a four-cylinder water cooled engine with a detachable head. The bore was 2.2” the stroke 3” and the capacity 747.5cc.  The 1935 engine produced 13.5 bhp at 3,000 rpm.