Valve Springs

Measure valve spring free length, installed height and pressure (tension). Replace valve spring if measurement is not within specification. See appropriate VALVES & VALVE SPRINGS table under ENGINE SPECIFICATIONS. Measure installed height between cylinder head spring seat (or top of shim, if shimmed) and top of spring shield (top of spring on 7.4L). If installed height exceeds specification, install shims as necessary to bring installed height to specification. On 5.7L engines, DO NOT install shims. Ensure installed height is not less than specified.