Dowel Pins are commonly lost during disassembly. Keep a few extra in the shop for your next Volkswagen rebuild. 5 piece kit. This Dowel Pin locates and indexes the main bearings in the crankcase so that the oil holes line up with the case. These Dowel Pins fit all 1200cc - 1600cc Volkswagens. It also fits the Type 4 engines. 5 are typically needed for one engine.