Volvo Penta D6 Cooling System Expansion Tank Pressure Cap 23321023
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Volvo Penta 23321023 is a genuine OEM pressure cap used in select Volvo Penta cooling-system assemblies. Current dealer schematic references place this part directly in the D6-280A-A cooling system, where it appears on the expansion tank alongside the heat exchanger, fuel cooler, hoses, clamps, and related cooling hardware.
Key Features
- Genuine Volvo Penta OEM part number 23321023.
- Identified in current Volvo Penta schematic references as Pressure Cap, schematic object key 18.
- Strongest application reference places it in D6-280A-A / Cooling System.
- Current exploded-view listings also tie it to the expansion tank cooling layout.
- Dealer weight references range from about 0.05 kg to 0.13 lb, depending on listing format.
Engine Compatibility
The strongest supportable fitment for 23321023 is Volvo Penta D6-280A-A, based on current schematic references that place it in that engine's cooling-system and expansion-tank assembly. Because the visible public references are narrow and centered on that specific schematic rather than a broad model table, the safest compatibility statement is to match this pressure cap to the exact Volvo Penta cooling-system diagram and serial-number-based application before ordering.
Serial Number Fitment Notice
Match Volvo Penta part number 23321023 to your engine serial number and the correct Volvo Penta cooling-system diagram before ordering. Cooling-system caps and expansion-tank hardware can vary by engine family, tank design, and production break, even when the surrounding heat exchanger layout looks very similar.
When This Part Needs Replacement
This pressure cap should be replaced when the seal is worn, the spring tension is weak, the cap no longer holds pressure correctly, or there are visible signs of corrosion, damage, or coolant loss around the expansion tank neck. It is also smart to inspect it anytime the expansion tank or nearby cooling-system components are already being serviced. This service guidance is an inference based on the part being identified as the cooling-system pressure cap on the expansion tank assembly.
Installation Notes
Confirm the exact application in the correct Volvo Penta schematic before installation, and compare the removed cap carefully against the replacement part. Inspect the expansion-tank neck and sealing surface before fitting the new cap, since pressure-cap performance depends on both correct application and a clean, undamaged sealing seat. This installation guidance is grounded in the part's placement on the expansion tank within the D6 cooling-system schematic.
Alternate/Superseded Part Numbers
The reviewed sources continue to list 23321023 as an active Volvo Penta OEM number. I did not find a clearly supported Volvo Penta superseded replacement number in the current source set.
Parts Desk Insight
With cooling-system caps like this, the easy mistake is assuming a cap that looks similar will work the same way. Matching the exact expansion-tank diagram first usually saves time, especially when cap style alone does not confirm the correct pressure rating or tank application.
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