Anti-rotation feature for followers using an oil gallery insert

An engine block, comprising:

• a cam rail comprising a rotating eccentric cam;
• a follower, comprising:
• a first end in contact with the rotating eccentric cam;
• a second end configured to contact with a portion of a valve train mechanism configured to open and close a fluid pathway of a combustion cylinder;
• a body extending between the first end and the second end;
• and
• a fluid port;
• an oil gallery bore parallel to the cam rail, the oil gallery bore configured to supply fluid to the follower fluid port;
• and
• a gallery insert along the oil gallery bore parallel to the cam rail, the gallery insert configured to abut the follower body to prevent rotation of the follower with respect to the cam rail, wherein the gallery insert is rotatable inside the oil gallery bore between an insertion position and an anti-rotation position, the insertion position permitting rotation of the follower and the anti-rotation position configured to prevent rotation of the follower.

An engine block, comprising:

• a cam rail comprising a rotating eccentric cam;
• a follower, comprising:
• a first end in contact with the rotating eccentric cam;
• a second end configured to contact with a portion of a valve train mechanism configured to open and close a fluid pathway of a combustion cylinder;
• a body extending between the first end and the second end;
• and
• a fluid port;
• an oil gallery bore parallel to the cam rail, the oil gallery bore configured to supply fluid to the follower fluid port;
• and
• a perforated gallery insert extending in the oil gallery bore, the perforated gallery insert configured to abut the follower body to prevent rotation of the follower with respect to the cam rail.

An engine block, comprising:

• a cam rail comprising a rotating eccentric cam;
• a follower, comprising:
• a first end in contact with the rotating eccentric cam;
• a second end configured to contact with a portion of a valve train mechanism configured to open and close a fluid pathway of a combustion cylinder;
• a body extending between the first end and the second end;
• and
• a fluid port;
• an oil gallery bore parallel to the cam rail, the oil gallery bore configured to supply fluid to the follower fluid port;
• and
• a gallery insert in the oil gallery bore, the gallery insert configured to abut the follower body to prevent rotation of the follower with respect to the cam rail,
• wherein the gallery insert comprises a keyed structure at one end, wherein the oil gallery bore comprises a keyed notch, and wherein the keyed structure seats in the keyed notch to orient the gallery insert.