Volvo Penta Oil Drain Plug Gasket – 20579690

Volvo Penta Oil Drain Plug Gasket – Part Number 20579690

Brand: Volvo Penta (Genuine OEM)
Part Number: 20579690
Supersedes: 20553989
Replaced By: No current replacement listed — 20579690 remains the active part number

This is a genuine Volvo Penta OEM sealing ring used at the engine oil drain plug or related lubrication-system service point. It is a small but important part — replacing this gasket every time the drain plug is removed helps prevent oil seepage and keeps the service clean. Sold individually.

Specifications

• System: Lubrication (Engine Oil)
• Type: Sealing ring / drain plug gasket
• Dimensions (reference): Approx. M24 × 22 mm | ~0.875 in ID × 1.294 in OD × 0.078 in thick
• Confirm dimensions against your specific engine serial number and parts diagram before ordering.

Compatible Applications

This part is used across a range of Volvo Penta engine applications in lubrication-system service. Fitment is engine- and assembly-specific. Confirm against your exact engine serial number and the correct Volvo Penta parts diagram before ordering:

• Select Volvo Penta gasoline and diesel marine engines (lubrication system service)
• Applications where the Volvo Penta parts diagram specifies 20579690 or superseded number 20553989

Serial Number Notice: Always verify fitment by engine serial number and the correct Volvo Penta parts diagram. The same service point may use different sealing rings across production ranges.

Alternate & Cross-Reference Part Numbers

• 20579690 — Volvo Penta OEM (this part, active number)
• 20553989 — Superseded Volvo Penta reference
• Elring 729.590 — Aftermarket cross-reference; verify by application
• DT 2.11432 — Aftermarket cross-reference; verify by application
• Febi 103152 — Aftermarket cross-reference; verify by application
• Ajusa 20005600 — Aftermarket cross-reference; verify by application

When to Replace

Replace this gasket whenever the drain plug or related fitting is removed during service. The sealing ring compresses under torque and should not be reused — a fresh gasket at each oil change is inexpensive insurance against oil seepage. Also replace if the existing ring is flattened, hardened, cracked, or deformed.

Installation Notes

• Clean the drain plug and mating surface before installing the new gasket
• Inspect the drain plug threads and sealing face for damage before reassembly
• Do not reuse the old gasket
• Follow the Volvo Penta service manual torque specification for your specific engine

Service Interval

Replace at every engine oil change, or any time the drain plug is removed. Refer to the Volvo Penta service manual for your specific engine model and serial number for oil change intervals — typically every 100–150 hours or annually, whichever comes first.

Technical FAQ

Can I reuse the old gasket?
No. The sealing ring is a crush-type gasket that deforms under torque. Reusing it risks oil seepage. Always install a new one.

Do I need one per oil change?
Yes — one gasket per drain plug per service. If your engine has multiple drain points, confirm how many are required for your specific application.

Is this the same as 20553989?
Yes — 20553989 is the superseded number. 20579690 is the current active Volvo Penta part number for this application.

Parts Desk Insights

This is one of those parts that customers often forget to order until they're mid-service with the plug already out. It's a good idea to keep a few on hand if you do your own oil changes — they're inexpensive and the cost of a small oil seep (cleanup, repeat service, potential damage) far outweighs the cost of a fresh gasket. If you're unsure whether this is the right sealing ring for your drain plug, have your engine serial number ready and we can help confirm.