Fuel pump

A pump for a fuel delivery system, the pump comprising:

• a main housing and a plunger housing arranged to couple to the main housing so as to define a compression chamber therebetween,
• the main housing and the plunger housing comprising respective first and second opposed faces which are arranged to form a seal therebetween;
• wherein the main housing comprises a projecting portion which projects from the first face of the main housing through an opening in the second face of the plunger housing into a plunger bore, and the projecting portion is sized so as to be a clearance fit with an adjacent wall of the plunger bore;
• the main housing comprising an inlet valve for controlling a flow of fuel into the compression chamber, the inlet valve comprising a valve member arranged for reciprocating movement within a valve bore defined by the main housing, wherein the valve bore is formed, at least in part, in the projecting portion.