18-3577-1 - Circulating Water Pump, Big Block GM Engines

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Part Number

Sierra Marine

Replaces OEM 3855991.

18-3577 CIRCULATING WATER PUMP (Bi-Directional)

Replaces: GM 6269358, OMC 987447, 983296, 986074, 3854118 Crusader 67859, 30103 Pleasurecraft RA057019 Mercruiser 17670, 811573,

For: Big block GM engines with STAMPED STEEL TIMING COVER.

Warranty (PDF)
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Sierra Marine Water Pump is equivalent to parts:

Sierra Marine is the market leader for aftermarket marine engine parts. Sierra products cover every major engine brand. Sierra offers a comprehensive product line and an unsurpassed customer satisfaction warranty covering parts and labor.