GMO 25 1977 80 151 4 CYL ENGINE PART Il LONGITUDINAL ENGINE 1 COVER Valve 0 386 65 MANIFOLD Exhaust 3 601 2 REINFORCEMENT Rkr Arm Cvr 0 413 66 MANIFOLD Intake 3 265 3 CAP Oil Filler 1 758 67 STUD Mfld to Head 3 8 24 x 3 8 4 REINFORCEMENT Rkr Arm Cvr Frt 0 413 16 x 2 3 275 5 BOLT Hex 5 16 18 x 5 8 8 900 68 STUD Mfld to Head 3 8 24 x 3 8 6 GROMMET C Case Vent Pipe 1 745 16 x 1 1 2 3 275 7 PIPE C Case Vent 1 762 69 GASKET Int Exh Manifold 3 270 8 GROMMET C Case Vent 1 745 70 VALVE Intake 0 296 9 CLIP Vacuum Pipe 3 142 71 VALVE Exhaust 0 297 10 GASKET Rkr Arm Cvr 0 423 72 ROD Valve Push 0 426 11 COVER Air Cleaner Pontiac OnIy 3 410 GUIDE Vlv Push Rod 1980 0 439 12 NUT 1 4 20 8 921 73 GASKET Cyl Head 0 289 13 AIR CLEANER Carburetor 3 402 74 BOLT 5 16 18 x 7 8 8 900 14 GASKET Air Cleaner to Carb 3 406 75 VALVE EGR Back Press Trans 3 670 15 NUT 5 16 24 8 921 76 BOLT Hex 3 8 16 x 7 8 8 900 16 CARBURETOR ASM 3 725 77 ADAPTER EGR Back Press Valve 3 670 17 INSULATOR Carb to H Shld See Cat 3 706 78 BOLT Hex 5 16 18 x 3 3 4 8 900 18 SHIELD Carb Heat See Charts 3 726 79 VALVE EGR 3 670 19 GASKET Air Heat See Charts 3 726 80 BOLT Hex 5 16 18 x 3 4 8 900 20 TUBE EGR Distr Primary Bore 3 675 81 GASKET EGR Back Press Valve 3 680 21 STUD Carb to Mfld 5 16 18 x 24 x 3 82 TEE Fitting to EGR EFE Valve 3 680 9 16 3 288 83 HOSE Vacuum 8 962 22 GASKET A CI I 3 403 84 VALVE Vacuum Break Delay 3 670 23 SCREW Hex 5 16 18 x 7 8 8 977 85 VALVE Spark Retard Delay 2 408 24 SILENCER A Cl 3 402 VALVE EFE Emission Cont Vac 3 670 25 TUBE Air Heat 3 417 86 BRACKET Pulsair Check Valve 3 670 26 SCREW Tap 8 18 x 1 2 8 977 87 HOSE Vacuum 3 4 ID 8 962 27 LOCK Valve Spring Cap 0 310 88 PIPE Check Valve Hose 3 675 28 SEAL Valve Oil 0 308 89 GROMMET Vent Pipe 1 745 29 CAP Intake Valve 0 309 90 NUT Hex 1 4 20 8 915 30 SHIELD Valve Stem Oil 0 308 91 WASHER Flat 3 8 ID x 3 4 OD 8 929 31 SPRING W Damper Valve 0 303 92 NUT Hex 3 8 16 8 915 32 BOLT Cyl Head W Stud 0 293 93 VALVE Pulsair Check 3 670 33 BOLT Cyl Head 1 2 13 x 3 37 G4 0 293 94 LIFTER ASM Valve 0 459 34 PIN Mfld to Head 1 2 x 3 4 0 293 95 GASKET Coolant Outlet Rubber 1 154 35 STUD Mfld to Hd 3 8 16 x 29 32 3 275 96 HEAD Cyl 0 269 36 TUBE EGR Dist Sec Bore 3 675 97 BOLT Hex 3 8 16 x 1 8 900 37 BOLT Intake to Exhaust Manifold 3 275 98 STUD Thermo Hsg 3 8 16 x 2 1 4 1 252 38 CLAMP Intake Exh Mfld to Hd 3 273 99 HOUSING Thermostat 1 251 I 39 WASHER Flat 1 OD x 25 64 ID 8 929 100 SWITCH EFE EGR Cont Cal 3 140 40 NUT 3 8 24 8 921 SWITCH EFE EGR Cont 3 670 41 SPRING Accel Pull Back 3 459 101 NIPPLE Thermo Housing 8 866 42 FITTING Vacuum W Cap 3 278 102 VALVE Thermo Vac Exc Cal 2 410 43 SCREW Tal 10 16 x 3 8 8 977 VALVE EGR Thermal Vac 3 670 44 SWITCH A C Cmpr Cut Off at Carb 9 275 103 GAUGE ASM Thermo Pin Type 1 150 45 BRACKET Throttle Control Cbl Mtg 3 454 104 BRACKET Alt Adj Eng Lift Exc A C 46 CLIP Throttle Control Idler Rod 3 425 Shown 2 277 47 RETAINER 3 8 8 934 A 105 BOLT Hex 3 8 16 x 3 4 3 8 900 48 LEVER Throttle Control Idler 3 454 106 THERMOSTAT Coolant Temp 1 246 49 STUD Lever 5 16 18 x 2 1 16 OL x 107 GASKET Outlet Fitting Plastic 1 154 1 2 3 459 108 OUTLET Eng Coolant 1 153 50 SHIELD Intake Exhaust Manifold 3 602 109 BOLT Hex 3 8 16 x I 1 4 8 900 51 GASKET Intake Exhaust Manifold 3 272 110 GUIDE Push Rod 0 439 52 PIN Part of Valve N S 111 STUD Valve Ball 0 429 VALVE Exhaust Heat 3 647 BOLT Rkr Arm Ball 0 349 53 SCREW Tap 3 8 16 x 1 8 977 112 ARM KIT Valve Rocker 0 333 54 SHROUD Exh Manifold 3 417 113 PLUG Spark 2 270 55 STUD Shroud to Exh Mfld 8 x 3 8 3 417 114 BALL Valve 0 429 56 SLEEVE EGR Intake Pipe 3 680 115 NUT Valve Ball Ret 3 8 24 x 1 2 0 429 57 NUT EGR Intake Pipe to Mfld 3 680 116 HOSE Vacuum 3 8 ID 8 962 58 PIPE EGR Intake to Exh Mfld 3 675 117 TEE C Case Vent Hose A 1 745 59 BRACKET EGR Pipe to Block 3 675 118 GROMMET C Case Vent Pipe 1 745 60 BOLT Hex 3 8 1 6 x 3 4 8 900 119 VALVE C Case Vent 1 745 61 SCREW Tap 1 4 14 x 3 4 8 977 120 PIPE Fuel Stock 8 963 8 964 8 964 62 BOLT Intake Exh Mfld to Cyl Hd 3 275 121 CLIP Fuel Feed Pipe 3 162 63 CLAMP Intake Exh Mfld to Cyl Hd 3 273 122 SCREW Tap M6 3 x 1 61 x 12 8 977 64 BUSHING Exh Cont Vlv Shft to Mfld 3 647 123 ROD Throttle Cont Idler 3 430 j 1987 GENERAL MOTORS SERVICEJPARTS OPEFlATIONS OLDSMOBlLE 31A 1 7 87 0 11 0 000 GROUP