Join Date: Jul 2006
Location: Northfield, Illinois
I don't know if this will help or add more confusion, but in parts books, there are 2 DIFFERENT part numbers for 750 Veloce sumps. Here is what I know from building speciality pumps for 750 Veloces.
Early 750 Veloce sumps are 3mm deeper than final production sumps. Early sumps would fit the oil pump bottom in the first picture below. Late production fit the shorter pump bottom pictured next. This pump was referred to as the '"replacement Veloce pump" and was an 11 tooth, short gear bottomed pump, referred to by engine builders in the late 50's early 60's as the "DEATH pump" as it failed very quickly in use due to inadequate idler pin support. Alfa redesigned the pump again for the 101-1300 along with the sump, a 101 casting number sump, back to being 3mm deeper once again.
I have seen 750 sumps with the SAME casting numbers but some 3mm shallower than others, these being late production. When did they change? I do not know, but by '59 they were shallow.
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