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CAUTION: When cleaning the cylinder head and block mating surfaces, do not use a metal scraper (2) Make sure the gasket and/or foreign material does not enter the oil feed hole or the oil return INSPECTION (1) Before cleaning, check for leaks, damage and cracks. (2) Clean cylinder head and oil passages. inch.) • Service Limit = 0.2 mm (0.008 inch.) • Grinding Limit = Maximum of 0.2 mm (0.008 inch.) is permitted. CAUTION: 0.20 mm (0.008 in.) MAX is a combined total dimension of the stock removal limit from cyl- CAMSHAFT (1) Inspect camshaft bearing journals for damage and binding (Fig. 108). If journals are binding, check (2) Check the cam surface for abnormal wear and damage and replace if defective. Measure the actual ROCKER ARMS The rocker arm shafts are hollow and are used as lubrication oil ducts. The rocker arm and shaft NOTE: To prevent air ingestion into lash adjusters, CAUTION: Do not allow rocker arm assembly to The intake and exhaust rocker arms are different. They should be identified before disassembling the Check rocker arms for wear or damage (Fig. 110): • Shaft bore scuffing or wear • Swivel pad on lash adjuster missing or broken • Rocker arm showing signs of fatigue or cracking • Roller axle protruding from arm Fig. 107 Checking Cylinder Head Flatness Fig. 108 Camshaft Inspection 300M 3.5L ENGINE 9 - 55 CLEANING AND INSPECTION (Continued) |