3861676 3589553 Thermostat Housing for Volvo Penta OMC V6 V8 Engines

Product Overview

This thermostat housing is designed for Volvo Penta and OMC V6 V8 marine engines. It regulates engine coolant flow to maintain optimal operating temperature. Boat owners and marine mechanics use this direct replacement part to restore proper cooling system function in stern drive and inboard applications.

Key Features & Performance

• Precision-engineered to meet OEM specifications for reliable cooling
• Constructed from corrosion-resistant aluminum for long life in marine environments
• Includes mounting gasket surface for a leak‑free seal
• Direct bolt‑on replacement; no modification required
• Compatible with both fresh and saltwater cooling systems

Fitment & Compatibility

• Volvo Penta V6 engines (4.3L, etc.)
• Volvo Penta V8 engines (5.0L, 5.7L, etc.)
• OMC V6 and V8 engines with compatible thermostat housing design

Common Uses

• Replace a leaking or failed thermostat housing on marine engines
• Overhaul cooling system during engine winterization or rebuild
• Upgrade from original plastic housing to a more durable metal unit

Technical Specifications

• Part Number(s): 3861676, 3589553
• Material: Aluminum
• Engine Type: Volvo Penta / OMC V6 & V8

Frequently Asked Questions

Q: Will this thermostat housing fit a Volvo Penta 5.0 GXI? A: Yes, it is compatible with many Volvo Penta V8 models including the 5.0 GXI, but always verify your engine’s specific part number.

Q: Does the housing come with a thermostat and gasket? A: This is the housing only; the thermostat and gasket must be purchased separately if needed.

Product appearance and specifications may vary slightly by batch. Compatibility may vary by serial number. Verify fitment before purchase.