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(5) Install ignition coil and spark plug wires. Tighten fasteners to 12 N·m (105 in. lbs.). (6) If the PCV valve was removed, apply Mopar t Thread Sealant with Teflon to threads and install (7) Connect PCV and make-up air hoses to cylin- der head cover (Fig. 44). (8) Install upper intake manifold (Refer to 9 - ENGINE/MANIFOLDS/INTAKE MANIFOLD - INSTALLATION). HYDRAULIC LASH DIAGNOSIS AND TESTING HYDRAULIC LASH ADJUSTER NOISE A tappet-like noise may be produced from several items. Check the following items. (1) Engine oil level too high or too low. This may cause aerated oil to enter the adjusters and cause (2) Insufficient running time after rebuilding cylin- der head. Low speed running up to 1 hour may be (3) During this time, turn engine off and let set for a few minutes before restarting. Repeat this several (4) Low oil pressure. gasket) in the vertical oil passage to the cylinder (6) Air ingested into oil due to broken or cracked oil pump pick up. (7) Worn valve guides. arm ears contacting valve spring retainer. (9) Rocker arm loose, adjuster stuck or at maxi- mum extension and still leaves lash in the system. (10) Faulty lash adjuster. installed in cylinder head. Depress part of rocker • Remove suspected lash adjusters, and replace as necessary. REMOVAL NOTE: This procedure is for in-vehicle service with (1) Remove cylinder head cover. (Refer to 9 - ENGINE/CYLINDER HEAD/CYLINDER HEAD COVER(S) - REMOVAL) (2) Remove rocker arm. (Refer to 9 - ENGINE/ CYLINDER HEAD/ROCKER ARMS - REMOVAL) (3) Remove hydraulic lash adjuster (Fig. 50). lash adjuster. (5) If reusing, mark each hydraulic lash adjuster for reassembly in original position. Lash adjusters INSTALLATION (1) Install hydraulic lash adjuster (Fig. 50). Ensure the lash adjusters are at least partially full of (2) Install rocker arm. (Refer to 9 - ENGINE/CYL- INDER HEAD/ROCKER ARMS - INSTALLATION) (3) Repeat installation procedure for each hydrau- lic lash adjuster. (4) Install cylinder head cover. (Refer to 9 - ENGINE/CYLINDER HEAD/CYLINDER HEAD COVER(S) - INSTALLATION) INTAKE/EXHAUST VALVES & DESCRIPTION The valves are made of heat resistant steel. They have chrome plated stems to prevent scuffing. Viton Fig. 50 Hydraulic Lash Adjuster 9 - 112 ENGINE 2.4L DOHC PT CYLINDER HEAD COVER (Continued) |