
Fuel Pump Block-Off Plate Fuel Pump Block Off Sb Chevy closes the mechanical fuel-pump opening on the listed engine when that pump location is no longer being used. This is common on engines converted to an electric fuel pump, where the original mechanical-pump opening still needs to be sealed against oil leaks and contamination.
Use the correct gasket or sealant method for the engine and tighten the plate evenly. Confirm the mechanical pump and pushrod arrangement has been addressed correctly for the specific engine build.