Water Pump Marine Circulating #850454R1 For GM 7.4/8.2L 454 502 SIERRA Engine

Water Pump Marine Circulating for GM

This marine circulating water pump is a replacement engine cooling component made for GM 7.4L and 8.2L 454 and 502 engines, cross-referenced to part number 850454R1, moving coolant through the block and heat exchanger to keep operating temperatures steady.

Overview

This circulating water pump serves marine and industrial GM 7.4L and 8.2L big block engines, including 454 and 502 configurations, by driving coolant through the cooling system during operation. The 850454R1 reference matches common aftermarket replacements used on marine setups such as inboard and stern drive applications. It is intended for boat owners, mechanics, and engine builders replacing a leaking or worn circulating pump.

Built For Performance

• Cross-references to part number 850454R1 for easy lookup
• Designed for GM 7.4L and 8.2L big block engines
• Suits 454 and 502 cubic inch displacement configurations
• Circulating design supports marine closed-loop cooling systems
• Replaceable unit simplifies service versus rebuilding a worn pump

Fits These Machines

• for GM 7.4L marine engine
• for GM 8.2L marine engine
• for GM 454 cubic inch marine engine
• for GM 502 cubic inch marine engine

On-The-Job Use

• Inboard marine engine cooling systems
• Stern drive engine service and repair
• Heat exchanger equipped marine setups
• Engine rebuilds and repower projects
• Commercial and recreational boat maintenance

Specs At A Glance

Good To Know

Q: Does this pump come with a gasket? A: Gasket and mounting hardware contents can vary by supplier batch, so confirm what is included with the listing before purchase. Order a gasket separately if you want a guaranteed seal on install.

Q: Will this fit both marine and automotive GM big blocks? A: It is listed for marine circulating applications on GM 7.4L and 8.2L engines. Accessory drive and pulley setups differ between marine and automotive versions, so match your application before ordering.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.