Chevrolet 5232720 Push Rod

Hydraulic lash adjusters are generally reliable and do not need frequent adjustments. To trace a noisy lash adjuster, listen for sounds while idling the engine, using a hose or tubing near each intake and exhaust valve, or by placing a finger on each valve spring retainer to feel for shocks if an adjuster is faulty. A common cause of noise, assuming adjustments are correct, is dirt trapped between the plunger and adjuster body. To remove the adjusters, first take off the intake manifold and pushrod cover if applicable, then remove the valve cover and lift each pushrod out. A special tool can be used to pull the adjusters from their bores, avoiding pliers on the adjuster body, and a stuck adjuster may be freed with carburetor cleaner. Keep all adjusters separated and identified for reinstallation. After cleaning each adjuster, inspect for nicks or damage, particularly at the bottom where it contacts the camshaft; any damage warrants replacement. When reinstalling, ensure adjusters are coated with 'Molykote' or a similar product, and if original adjusters are reused, they must go back into their original bores. Install the valve components, valve cover, and intake manifold with new gaskets, then reassemble the remaining engine components. Fill the radiator with coolant, start the engine to check for leaks, and adjust ignition timing and valves as necessary, rechecking the coolant level after the engine reaches operating temperature.