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420 GM 454 V8 1987-1989 - Serial 0A398941 Thru 0B622418 - Cylinder Head And Rocker Cover
Section Drawing: (Hover or click to view larger)
Other Sub-Sections:
- Alternator (Mando AC-155603)
- Alternator (Mando AR-150)
- Alternator (Motorola 8MR2039K)
- Alternator (Prestolite 8EM2003KA)
- Audio Warning System
- Carburetor And Linkage
- Crankshaft - Pistons - Connecting Rods
- Cylinder Block And Camshaft
- Cylinder Head And Rocker Cover
- Distributor And Ignition Components
- Driveshaft And Tailstock
- Electrical Components (0A398941 Thru 0D763854)
- Electrical Components (0D763855 Thru 0D937011)
- Exhaust Cover (420)
- Exhaust Manifold - Elbow (420 GIL System)
- Exhaust Manifold - Elbow (425 GIL System)
- Exhaust Manifold - Elbow (Mercruiser System)
- Flywheel Housing
- Fuel Pump And Fuel Filter (0A398941 Thru 0D725499)
- Fuel Pump And Fuel Filter (0D763855 Thru 0D937011)
- Intake Manifold And Front Cover
- Mount Plates (Engine)
- Oil Cooler (0A398941 Thru 0D725499)
- Oil Cooler (0D725500 Thru 0D937011)
- Oil Pan And Oil Pump (0A398941 Thru 0D725499)
- Oil Pan And Oil Pump (0D725500 Thru 0D937011)
- Power Steering Components
- Power Steering Cylinder Assembly
- Seawater Pump Assembly (0A398941 Thru 0D725499)
- Seawater Pump Assembly (0D725500 Thru 0D937011)
- Starter And Alternator Mounting
- Starter Assembly
- Thermostat Housing (420)
- Thermostat Housing (425)
- Transmission And Related Parts
- Transmission And Shift Linkage
- Transmission And Tailstock
| Ref. | OEM Part # | Hardin # | Mallory # | GLM # | Other # | Description | Num Req. | Superseded From | Special Notes |
| 1 | 821948T1 | COVER ASSEMBLY, Rocker | 2 | 821948A1 | This Part is No Longer Available SN# 0A398941 THRU 0D725769 | ||||
| 1 | 821948T4 | COVER ASSSEMBLY, Rocker | 2 | 821948A3 | This Part is No Longer Available SN# 0D725770 THRU 0D937011 | ||||
| 2 | 25-49767 | GROMMET, Rocker Cover | 2 | This Part is No Longer Available No longer made, limited availability | |||||
| 3 | 24-70086 | SPRING, Filler Cap | 2 | SN# 0A398941 THRU 0D725769 No longer made, limited availability | |||||
| 4 | 17345 | CAP, Oil Filler | 2 | 42336 | SN# 0A398941 THRU 0D725769 | ||||
| 4 | 36-811569 | CAP, Oil Tank, Oil Filler | 2 | SN# 0D725770 THRU 0D937011 | |||||
| 5 | 41598T | BREATHER, Rocker Cover | 2 | 41598 | This Part is No Longer Available 420 Models | ||||
| 5 | 41598T | BREATHER, Rocker Cover | 2 | 14902 | This Part is No Longer Available 425 Models | ||||
| 6 | 37-818991 | DECAL, 420 Models | 2 | ||||||
| 7 | 16-56766 | STUD, (.250-20/.250-28 x 1.380) | 14 | ||||||
| 8 | 12-39143 | WASHER, (.253 x .625 x .0937) | 14 | ||||||
| 9 | 11-8267089 | NUT, (.250-28) | 14 | 11-20361 | |||||
| 10 | 27-14765 | 676-9-61311 | GASKET, Rocker Cover | 2 | 1 | ||||
| 11 | 848263 | PUSH ROD, Vavle | 8 | Intake | |||||
| 11 | 848266 | PUSH ROD, Valve | 8 | Exhaust | |||||
| 12 | 843080 | VALVE, Exhaust - Standard | 8 | 13024 | |||||
| 13 | 95820 | STUD, Rocker Arm Valve | 16 | SN# 0A398941 THRU 0D725499 | |||||
| 13 | 16-821836 | STUD, Rocker Arm Valve | 16 | SN# 0D725500 THRU 0D937011 | |||||
| 14 | 49132 | GUIDE, Push Rod | 8 | SN# 0A398941 THRU 0D725499 | |||||
| 14 | 881686 | GUIDE, Push Rod | 8 | 811586 | SN# 0D725500 THRU 0D937011 | ||||
| 15 | 24-13455T | SPRING, Valve | 16 | 24-13455 | |||||
| 16 | 843376 | RETAINER, Valve Spring | 16 | 98598 | |||||
| 17 | 26-827645 | SEAL, Valve Stem | 16 | 15832 | 1 | ||||
| 18 | 15-845669 | SHIM, Valve Spring (.015) | 16 | 15-54531 | |||||
| 18 | 15-77624 | SHIM, Valve Spring (.030) | 8 | ||||||
| 19 | 96028 | LOCK, Valve Stem (32 Keys) | 1 | ||||||
| 20 | 69304T | ARM, Valve Rocker | 16 | 69304 | This Part is No Longer Available | ||||
| 21 | 11-848610 | NUT | 16 | 11-44481 | |||||
| 22 | 938-816778T3 | CYLINDER HEAD ASSEMBLY | 2 | 938-816778 | SN# 0A398941 THRU 0D725499 | ||||
| 22 | 938-811529T1 | CYLINDER HEAD KIT | 2 | 938-811529A4 | This Part is No Longer Available (.375) 425 Models | ||||
| 22 | 938-826363T1 | CYLINDER HEAD KIT | 2 | 938-8263632 | This Part is No Longer Available (.437) 425 Models | ||||
| 23 | 821024T | VALVE, Inlet - Standard (2.250) | 8 | 821024 | |||||
| 24 | 8M0049045 | GASKET, Cylinder Head | 2 | 27-13687 | SN# 0A398941 THRU 0D725499 1 | ||||
| 24 | 879150139 | GASKET, Cylinder Head | 2 | 27-811546 | SN# 0D725500 THRU 0D937011 1 | ||||
| 25 | 10-8M0000463 | BOLT (2.00 Inch) Cylinder Head | 8 | 10-491061 | |||||
| 26 | 10-8M0000482 | BOLT, (4.125 Inch), Cylinder Head | 24 | 10-49105 | |||||
| - | 27-13218A1 | GASKET SET | 1 | SN# 0A398941 THRU 0D725499 | |||||
| - | 27-808730A98 | GASKET SET | 1 | 27-808730A92 | This Part is No Longer Available SN# 0D725500 THRU 0D937011 |