Sierra 18-31604 Volvo Penta Sea Water Pump Replaces 3581558

The Sierra 18-31604 is a replacement raw water (sea water) pump engineered for Volvo Penta KAD, KAMD, AD, and TAMD series diesel marine engines. Designed to meet or exceed OEM specifications, this pump is a direct drop-in replacement for Volvo Penta part numbers 3581558 and 3583115, restoring full cooling system performance without modification.

Sierra has been producing marine engine parts for over 50 years, supplying components that meet the confidence of engine manufacturers and boat builders alike. Each pump is built from new components — not remanufactured — ensuring reliable, long-lasting performance in demanding saltwater and freshwater environments.

Key Features:

• Direct replacement for Volvo Penta OEM part numbers 3581558 and 3583115
• Compatible with KAD, KAMD, AD, and TAMD Volvo Penta diesel engine families
• Built to meet or exceed OEM specifications
• New construction — not remanufactured
• Connection outer diameter: 32 mm / inner diameter: 27 mm
• UPC: 808282378738

Replaces OEM Part Numbers: 3581558, 3583115, 860629, 860827

Compatible engine models include AD31L-A, AD31P-A, AD31X, AD41B, AD41D, AD41L-A, AD41P-A, D41B, D41D, D41L-A, KAD300, KAD32, KAD42A, KAD42B, KAD42P-A, KAD44P-A, KAD44P-B, KAD44P-C, KAMD300, KAMD42A, KAMD42B, KAMD42P-A, KAMD43P-A, KAMD44P-C, TAMD31D, TAMD31L, TAMD31M, TAMD31P-A, TAMD31S, TAMD41B, TAMD41D, TAMD41H, TAMD41L, TAMD41M, TAMD41P, TAMD42B, TAMD42WJ-A, TMD31D, TMD31L-A, TMD41B, TMD41D, TMD41L-A.