Vintage Austin Services Engineering services for pre war Austin Sevens Home Axle Repaires & Rebuilds Crankcase Repairs Re-boring Road Springs Steering & Road Wheels Contact Links & Legal 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 Austin Seven crank case And after repair ......... 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.
These views show the crankcase following repair. The remaining part of the broken lip as been removed by machining. The crankcase is then drilled through the threaded holes used to retain the front bearing retaining plate.   High tensile countersunk Austin Seven Crank Case