Volvo Penta Inspection Cover Gasket 20591544 | TAMD60–75 TD TWD OEM
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Volvo Penta Inspection Cover Gasket – 20591544
Part Information
- Part Number: 20591544
- Brand: Volvo Penta
- Official Product Type: Inspection Cover / Crankcase Cover Gasket
- OEM Status: Genuine Volvo Penta
- Supersedes: 421121
- System: Cylinder Block – Crankcase Inspection Cover Assembly
- Quantity Note: Many applicable 6-cylinder engines use 2 gaskets — confirm quantity from your engine parts diagram
What This Gasket Does
The 20591544 is the OEM sealing gasket for the cylinder block inspection cover on a broad range of Volvo Penta marine and industrial diesel engines. It seals the inspection-cover opening in the crankcase, preventing oil seepage and contamination around the access-cover joint. The inspection cover provides access to the cylinder block interior for service and inspection — any time it is removed, this gasket should be replaced.
Compatible Applications
- Volvo Penta TAMD60A / TAMD60B / TAMD60C
- Volvo Penta TAMD61A / TAMD62A
- Volvo Penta TAMD63L-A / TAMD63P-A
- Volvo Penta TAMD70B / TAMD70C / TAMD70D / TAMD70E
- Volvo Penta TAMD71A / TAMD71B
- Volvo Penta TAMD72A / TAMD72P-A / TAMD72WJ-A
- Volvo Penta TAMD73P-A / TAMD73WJ-A
- Volvo Penta TAMD74A / TAMD74C / TAMD74L / TAMD74P
- Volvo Penta TAMD75P-A
- Volvo Penta TD610 / TD630 / TD640
- Volvo Penta TD70 / TD71 / TD730
- Volvo Penta TWD610 / TWD630 / TWD710 / TWD731 / TWD740
- Related D5 / D6 / D7-family industrial applications using the same inspection-cover gasket architecture
Confirm the exact engine model and serial number using the Volvo Penta cylinder-block parts diagram before ordering. On many six-cylinder applications, two gaskets are required — one per inspection-cover position. Verify the quantity for your specific engine.
Serial Number Fitment Notice
Use your engine serial number to locate the correct Volvo Penta cylinder-block diagram and confirm that 20591544 is specified at the inspection-cover position before ordering. Also verify the quantity required — six-cylinder engines commonly call for two gaskets in the same assembly.
When to Replace
- Inspection cover is removed for any reason
- Oil seepage visible around the inspection-cover perimeter
- Gasket is flattened, brittle, torn, or oil-soaked
- Cylinder-block service requires access through the inspection opening
- Cover joint has been disturbed during engine repair
A used, compressed gasket should not be reused once the inspection cover has been removed.
Installation Notes
Clean both the inspection-cover and cylinder-block mating surfaces thoroughly and remove all traces of the old gasket without damaging the sealing faces. Inspect the cover for distortion, corrosion, or damaged fastener holes. Install the new gasket in the correct position and tighten the cover fasteners evenly using the Volvo Penta service procedure for your engine. If both inspection covers are being removed during the same service, order the full quantity shown in the parts diagram — many applications require two gaskets.
Technical FAQ
Q: Does 20591544 replace 421121?
A: Yes. Volvo Penta 20591544 is the current active number and supersedes the earlier reference 421121.
Q: How many gaskets does my engine need?
A: Many six-cylinder TAMD/TD/TWD engines use two inspection covers and therefore two gaskets. Confirm the exact quantity from the cylinder-block parts diagram for your engine serial number.
Q: Can I reuse the old gasket if it looks intact?
A: No. Once compressed and disturbed, the inspection-cover gasket should be replaced to ensure a reliable oil-tight seal on reassembly.
Alternate Part Numbers
- Volvo Penta 20591544
- Volvo Penta 421121 (superseded)
- Elring 375.740
- DT Spare Parts 2.10263
- LEMA 20988.1 / 20988.10
Parts Desk Insights
This gasket covers a wide range of the larger Volvo Penta TAMD and TD/TWD diesel families, which are common in commercial and heavy-duty marine applications. The key detail to get right is the quantity — if both inspection covers are coming off, order two gaskets before starting the job so you’re not waiting on a single gasket to finish the work. At this price point, ordering an extra gasket when you’re already in the area is cheap insurance against reopening the crankcase later.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
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