3-13. OIL PRESSURE REGULATOR HOUSING MAINTENANCE (Contd) d. Assembly 1. Install plunger (2) and piston oil cooling control valve spring (8) in regulator valve housing (1). 2. Install new gasket (7) and piston oil cooling control valve plug (6) in regulator valve housing (1). 3. Install plunger (2) and oil pressure regulator spring (3) in regulator valve housing (1) 4. Install new gasket (4) and oil pressure regulator valve plug (5) in regulator valve housing (1). 5. Install plug (9) in regulator valve housing (1). 3-44