If seat does not make proper contact, lap the valve into the seat. [1] – Apply small amount of fine lapping compound to face of…

[1] – Grind intake valve seat using a 30° seat grinder, and exhaust valve seat using a 45° seat grinder. Follow tool manufacturers instructions. [2]…

[1] – Measure spring free length (C). Replace spring if measurement exceeds specification. [2] – Measure spring inclination (D). Replace spring if measurement exceeds specification.…

[1] – Clean valve guides using a valve guide brush. [2] – Measure valve guide inside diameter using a ball or telescoping snap gauge. If…

[1] – Check valve for out-of-round, bent or warped condition using a valve inspection center and dial indicator. Replace valve if necessary. [2] – If…

Measure cylinder head flatness. Place a straight-edge along each of the four sides and each diagonal. Measure clearance between straight edge and combustion surface with…

[1] – Compress valve springs (A) using JDE138 Valve Spring Compressor. [2] – Remove collet halves (B) from retainer (C). [3] – Slowly release compressor…

[1] – Remove air cleaner and air cleaner mounting bracket. [2] – Remove rocker arm assembly. (See Remove and Install Rocker Arm Assembly and Push…

[1] – Remove muffler. (See Remove and Install Muffler in Section 30, Group 10.) [2] – Remove six cap screws holding exhaust manifold to cylinder…

[1] – Before disassembly mark all parts for location to aid reassembly. [2] – Remove end retaining rings (A) and slide components off rocker arm…