RB Oil Pump Install SleeveA tool you didnt know you needed until you use it once. Designed and tested in a real world engine building environment, the HRB RB Oil Pump Install Sleeve is a simple yet vital addition to your workshop. We use it every day during assembly, and its especially critical when fitting oil pumps onto RB engines that have crank collars installed, where the seal lead in is extremely minimal. This tool ensures that the oil pump housing front seal slides