Sierra Marine Parts Catalog

790 OIL PANS AND GASKET CYLINDER HEAD ASSEMBLIES All cylinder heads are new castings and complete assemblies with new- stainless steel valves, hardened steel exhaust seats, valve springs, valve locks, and retainers. All GM cylinder heads utilize high performance screw-in rocker arm studs in place of factory press in rocker arm studs. 18-4485 CYLINDER HEAD ASSEMBLY Replaces: 938-883490R1, 938-883490, 938-883490R50, 938-884741R 938-884741R50 Fits: 5.7L V-8 GM (1987-95) with press in rocker arm studs with 12 intake manifold mounting bolts- (4 inside intake manifold bolts at 23 degrees), center mount valve covers 18-4486 CYLINDER HEAD ASSEMBLY Replaces: 938-883297 1, 938-803860T Fits: 5.7L V-8 GM Vortec (1996-Up) with press in rocker arm studs with 8 intake manifold mounting bolts, composite valve cover 18-4489 CYLINDER HEAD ASSEMBLY Replaces: 936-5544, 936-810840 1.94/1.60 valves. Fits: 2.5L/3.0L GM (1968-95) (non MerCruiser LX models) (1968-95) 18-4491 CYLINDERHEADASSEMBLY Replaces: 938-827178 Replaces 4.3L Vortec V-6 (1996-Up)with screw in rocker arm studs (non-adjustable valve train), 8 intake manifold mounting bolts, center mount valve cover. NOTE: not for use with engines using factory roller rocker arms. 18-4501 CYLINDER HEAD Fits: 5.0L Vortec I/O — MERCRUISER - Internal Engine System ➀ Do not use on V-6 engines equipped with remote oil filter kit * Display Packaged SEE PAGES 182-184 & 1147-1170 FOR ADDITIONAL INFORMATION OIL FILTERS • Manufactured to meet or exceed OEM specifications. • High Efficiency Filter • Field-tested and approved. • Anti-drainback valves where required. Features… 18-4501HP CYLINDER HEAD Fits: Vortec GM small block 5.0L Completely assembled with revised runner and combustion cham- bers. Add 30hp to stock motor with no additional modifications. 18-4486HP CYLINDER HEAD ASSEMBLY Fits: Vortec GM small block 5.7L high performance Completely assembled with revised runner and combustion chambers. Add 30hp to stock motor with no additional modifications. Part No. OE OE No. Application 18-0612 Mercruiser 809910, 14259 1 piece rear main seal; GM Small Block V8 (Right Handed Dipstick) 18-0613 Mercruiser 93476 2 piece rear main seal; GM Small Block V8 (Right Handed Dipstick) 18-0614 Mercruiser 845668T, 850458, 811549 1 piece rear main seal; GM Big Block V8 (Right Handed Dipstick) 18-0615 Mercruiser 93477T, 93477, 14760, 75639 2 piece rear main seal; GM Big Block V8 (Right Handed Dipstick) 18-0616 Mercruiser 14244T, 14244 1 piece rear main seal; GM V6 (Right Handed Dipstick) Drain Plug: M12 - 1.75 Part # O.E. # Application 18-7824-2* 54111,14957, 32716, 35-802885Q, 35-866340K01, 35-866340Q03, 35-866340Q02, 35-866340K01, 35-866340Q, 52731A1, 52731, 52022, 32717, 14957 GM Engines ➀ (Short Filter) 18-7871 35-805809, 35-805809T D7.3L Diesel 18-7875* 60565, 35-802886Q Ford Engines (Long Filter) 18-7876-1* 52731, 35-16595T, 35-866340Q03, 35-866340Q02, 32- 802885Q, 14957, 54111, 52731A1, 52022, 32717, 32716 GM Engines (Long Filter) 18-7878-1* 803470, 803470Q, 46692, 38463 60 & 80 HP Engines (Renault) (Short Filter) 18-7879-1* 41815, 35-802884Q, 35-883702Q, K GM V-6 Engines