Sierra 18-2845 Valve Cover Gasket for GM 305/350 CID 5.0L and 5.7L Engines

The Sierra 18-2845 is a white valve cover gasket engineered as a direct fit for GM 305/350 CID (5.0L and 5.7L) marine engines. It seals the mating surface between the valve cover and cylinder head to prevent oil leaks and keep contaminants out of the valvetrain, and it is built to meet or exceed the specification of the original equipment part it replaces. The gasket is manufactured from glass material in a round profile designed to match the factory valve cover bolt pattern and sealing surface on these applications.

Because valve cover gaskets are a routine maintenance and repair item, this part is commonly replaced whenever a valve cover is removed for service or when an existing gasket has hardened, cracked, or begun to weep oil. It is cross-referenced to a wide range of OEM and aftermarket equivalents, making it easy to match against a part already on the engine. As a Sierra-manufactured component, it is backed by Sierra's standard customer satisfaction warranty.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-2845
• Product Name: Valve Cover Gasket
• Material: Glass
• Color: White
• Shape: Round
• UPC: 030999313539
• Weight: 0.19 pounds

Fitment

• GM 305/350 CID (5.0L and 5.7L) engines

Replaces (OEM)

• Chris-Craft 16.11-01236
• Crusader 91351
• GLM 30353
• Mallory 9-61300
• Mercruiser Stern Drive 27-11999
• Mercruiser Stern Drive 27-34043
• Mercruiser Stern Drive 27-52202
• Mercruiser FI1101236
• Mercruiser FI5000161
• OMC Stern Drive 912965

Frequently Asked Questions

What engines does the Sierra 18-2845 valve cover gasket fit? The 18-2845 is designed for GM 305/350 CID (5.0L and 5.7L) marine engines.

Is the Sierra 18-2845 an OEM part or aftermarket equivalent? It is a Sierra-manufactured aftermarket gasket built to meet or exceed the original equipment part it replaces, rather than an OEM-branded piece.

What material is the 18-2845 valve cover gasket made from? This gasket is made from glass material, formed into a round profile that matches the factory valve cover sealing surface.

What color is the Sierra 18-2845 gasket? It is white, which is the standard color Sierra produces this gasket in.

How much does the Sierra 18-2845 valve cover gasket weigh? The 18-2845 weighs 0.19 pounds.

Which OEM part numbers does the 18-2845 cross-reference to? It is interchangeable with Chris-Craft 16.11-01236, Crusader 91351, GLM 30353, Mallory 9-61300, Mercruiser Stern Drive 27-11999, 27-34043, and 27-52202, Mercruiser FI1101236 and FI5000161, and OMC Stern Drive 912965.

Does one 18-2845 gasket cover both valve covers? Each 18-2845 is a single valve cover gasket, so a typical V-8 installation with two valve covers requires two gaskets.

When should I replace the valve cover gasket on my GM 305/350 marine engine? Replace the 18-2845 whenever the valve cover is removed for service, or sooner if the existing gasket has hardened, cracked, or is showing signs of an oil leak at the cover seam.

Is the 18-2845 covered under warranty? Yes, the Sierra 18-2845 valve cover gasket is covered under Sierra's standard customer satisfaction warranty, as are all Sierra parts.

What is included when I order the 18-2845? You receive one Sierra 18-2845 white valve cover gasket; it does not include mounting hardware or other engine gaskets.