After lubricating the new O-rings with clean engine oil, you can install the regulator seal backup ring, the regulator seal upper O-ring, the regulator assembly filter, and the regulator seal lower O-ring. Next, you can assemble the regulator with the vacuum tube, the
Fuel Pressure Regulator retainer clip, and the upper manifold assembly. After connecting the negative battery cable, you need to inspect for leaks and install the engine cover.