Description

Volvo Penta 1674083 is a genuine OEM pressure cap used on Volvo Penta closed-cooling applications. Volvo Penta’s official parts shop lists 1674083 as an active genuine pressure cap, and current reviewed public references identify it more specifically as an expansion / header tank pressure cap. Current reviewed sources also provide useful size details for this exact part number: thread 1-25/32″, outside diameter 3″, and height 0.75″. Current reviewed aftermarket references also identify it as a 75 kPa pressure cap.

Key Features

• Genuine Volvo Penta OEM part number 1674083.
• Expansion / header tank pressure cap for closed-cooling systems.
• Current reviewed dimensions: thread 1-25/32″, diameter 3″, height 0.75″.
• Current reviewed pressure specification: 75 kPa.

Engine Compatibility
Current public references point to cooling-system use across Volvo Penta diesel and petrol engines with closed cooling rather than one narrow engine-only list. The strongest reviewed OEM-style fitment currently visible is D2-75 A, D2-75 B, D2-75 C, and D2-75F, while additional current reviewed sources describe it more broadly for many Volvo Penta closed-cooling engine applications. Fitment should still be confirmed by exact engine serial number and by matching the original cap and neck style before ordering.

Serial Number Fitment Notice
Pressure caps can vary by cap height, locking tabs, pressure setting, and tank-neck design. Confirm Volvo Penta 1674083 by engine serial number and by matching the original cooling-system cap before ordering. Volvo Penta continues to list 1674083 as an active genuine part number.

When This Part Needs Replacement
Replace this cap when the original seal is hardened or damaged, the spring tension is weak, the cap no longer holds pressure correctly, or there are visible signs of coolant leakage around the expansion/header tank neck. Because current reviewed sources identify 1674083 as a 75 kPa expansion tank cap, dependable pressure control is a key part of proper cooling-system performance.

Installation Notes
Install only after confirming the exact cap style and cooling-system application. Compare the replacement directly to the original cap and inspect the tank neck and sealing surfaces during service. The current reviewed dimensional checkpoints for this exact part number are 1-25/32″ thread, 3″ diameter, and 0.75″ height, which are useful matching points before final installation.

Alternate/Superseded Part Numbers
Current reviewed sources show Volvo Penta 1674083 associated with earlier or replacement-linked numbers 1357775, 1674084, 463828, and 3850064 in current market references. Current confirmed Volvo Penta ordering number is 1674083.

Parts Desk Insight
For cooling-system caps like 1674083, the strongest buying checkpoint is the exact tank neck, cap style, and pressure rating, not the words “pressure cap” alone. The clearest reviewed match points here are 75 kPa, 3″ outside diameter, and 1-25/32″ thread, plus direct comparison to the original cap on the engine.

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