Inspection
Check cylinder head warpage. If warpage exceeds specification, resurface head, but DO NOT exceed grinding limit. See CYLINDER HEAD table under ENGINE SPECIFICATIONS. After resurfacing cylinder head, check cylinder head height. Replace cylinder head if height is less than minimum specification. Replace cylinder head bolts if length from bolt head contact surface to tip of bolt shank exceeds 4.154" (105.5 mm).
Inspect timing belt for drive teeth wear, cracking and oil contamination. Replace belt if damaged or contaminated. Rotate belt tensioner to check for abnormal noise. Replace damaged components.
Replace HLA if friction surfaces are worn or damaged. Hold bucket body and press plunger by hand. If plunger moves, replace valve lash adjuster.
Inspect all friction surfaces for scoring or wear. Measure camshaft dimensions. Replace camshaft if dimensions are not within specification. See CAMSHAFT table under ENGINE SPECIFICATIONS.
Replace pressure relief valve spring if length is not as specified. See OIL PUMP SPECIFICATIONS table. Ensure plunger slides freely in bore. Replace front cover and oil pump assembly if clearances are not as specified.