2. Remove the camshaft chain cover (see section 13).
3. Remove the four bolts securing the oil filter adapter to the timing cover. The cover is spring loaded, so loosen the bolts while holding it, then carefully release the spring pressure.
4. Remove the pressure regulator valve and spring (see illustration). To remove all remnants of the old gasket, use a special scraper.
14.4 Remove the pressure regulator valve and spring, then inspect the valve for wear and damage
5. Clean all parts with solvent and dry with compressed air.
Attention! Don't forget to protect your eyes. Check for signs of wear, scoring or valve warping.
6. Installation is carried out in reverse order. Don't forget to use a new gasket.
7. Tighten all bolts to the torque specified in the specifications in this chapter.
8. Start the engine and check for leaks.
[The text of the article was obtained from the website ChevyMan]