Thanks, yes - I know about the bolt upgrade, but that's only half of the problem.
Rick122S;121706 wroteSame with the gear, there is an early and later, upgraded version
If by oil pump gear, you mean oil pump pulley, maybe you missed this part of what I wrote earlier:
bgpzfm142;121694 wrote Again, the pulley was a uniquely B204/B234 part, and they are NLA from Mother Volvo. Nobody in the aftermarket AFAIK makes oil pump pulleys for them, either.
PS: The B21 based oil pumps in the B230 have never had any problems in competition, AFAIK - and none of the Group A 240 Turbos that I know of ever died of low oil pressure at any of the Spa 24 Hour races, or any of the 500 km ETC races. IMO it would be a folly to run a B234 in competition today, because parts that must be replaced on spec to ensure reliability - like that oil pump pulley - aren't available any more.
It also appears most LeMons racers in the US who are using 16V engines do a timing belt change on spec between events, and they use kevlar belts. Even that type of belt is a lot cheaper to replace than an entire valvetrain, and that's what's at risk when a belt breaks or the oil pump pulley ^on a B234^ lets go.
