Valve Springs
WARNING: This page is about a different car, the 1999 Cadillac Catera and 1998 Cadillac Catera. However, it is still accessible from the selected car via links, so may be relevant.
If spring length is less than 34 mm (1.338 in.) while under a compressive force of 56.6 lbs. (252 N), replace spring. See CYLINDER HEAD table under ENGINE SPECIFICATIONS.