ENGINE TOP END. Valve Guide Installation

Valves

Valve Guide Installation

• Apply molybdenum disulfide oil to the valve guide outer surface before installation.

• Heat the area around the valve guide hole to about 120 ~ 150°C (248 ~ 302°F).

• Drive the valve guide in from the top of the head using the valve guide arbor. The flange stops the guide from going in too far.

Special Tool - Valve Guide Arbor, ф5.5: 57001-1021

• Ream the valve guide with a valve guide reamer [A] even
if the valve guide is reused.

Special Tool - Valve Guide Reamer, </>5.5: 57001-1079

Valve Seat Inspection

• Remove the valve (see Valve Removal).

• Check the valve seating surface [A] between the valve [B] and valve seat [C].

OCoat the valve seat with machinist’s dye.

OPush the valve into the guide.

ORotate the valve against the seat with a lapping tool.

OPull the valve out, and check the seating pattern on the

valve head. It must be the correct width and even all the

way around.

• Measure the outside diameter [D] of the seating pattern on the valve seat.

• If the outside diameter of the valve seating pattern is too large or too small, repair the seat (see Valve Seat Repair).