420 GM 454 V8 1987-1989 - Serial 0A398941 Thru 0B622418 - Thermostat Housing (420)

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Ref. OEM Part # Hardin # Mallory # GLM # Other # Description Num Req. Superseded From Special Notes
1 87290A4         HOUSING ASSEMBLY, Thermostat 1
SN# 0A398941 THRU 0C576119
1 90736A18         HOUSING ASSEMBLY, Thermostat 1
SN# 0C576120 & Up
2 23-47511         SLEEVE, Thermostat Housing 1

3 22-32803         PLUG, Pipe (.375-18) Brass 2

4 27-530451         GASKET, Thermostat Housing 1
2
5 807252T1         THERMOSTAT, 140 Degrees 1 8052731
6 27-47510         GASKET, Thermostat 1
2
7 23-47508T         SLEEVE 1 23-47508
8 27-488181         GASKET, Thermostat Cover 1
2
9 47441A1         COVER, Thermostat 1
SN# 0A398941 THRU 0C576119
9 8M0061068         COVER, Thermostat 1 47442A1 SN# 0C576120 & Up
10 10-60410         SCREW, (.375-16 x 4.250) 2

11 12-20553         WASHER, (.406 x .734 x .063) 2

12 22-41622         PLUG, (3/4-14), Pipe 1 22-33198A1
12A 22-98477A2         VALVE ASSEMBLY 1

12B 32-8M0062614         HOSE, (48.00 Inches Bulk), Cut As Required 2 32-3322070
13 32-8M0062665         HOSE, (48.00 Inches Bulk), Cut As Required - Water Pump To Oil Cooler 1 32-5346170
14 54-180766         CLAMP, Worm Gear 8

15 32-12817         HOSE, Oil Cooler To Oil Cooler 1

16 32-848956         HOSE, Oil Cooler To Tube 1 32-12818
17 22-13177         TUBE, Water Hose 1

18 32-896998         HOSE, Molded, Oil Cooler To Thermostat Housing 1 32-64346
19 32-897181         HOSE, Thermostat Housing To Water Pump 2

20 54-180769         CLAMP, Worm Gear 2   This Part is No Longer Available
21 32-897491         HOSE, Port - Thermostat Cover To Exhaust Manifold 1

22 32-897301         HOSE, Starboard - Thermostat Cover To Exhaust Manifold 1

23 54-180764         CLAMP, Worm Gear 4

- 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