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Gasket 838013 – Fits Volvo Penta MD5A, MD5B, MD5C Engines (Replaces 838013)

Sale price $8.50 Regular price $13.00
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Gasket 838013 – Fits Volvo Penta MD5A, MD5B, MD5C Engines (Replaces 838013) is backordered and will ship as soon as it is back in stock.


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You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.

Delivery and Shipping

Free standard shipping on all orders under 1 KG

If you have any questions, feel free to email us at info@sierramarines.com, and we’ll get back to you within 20–36 hours.

Product Details

This is a replacement Gasket 838013 designed for the thermostat housing on Volvo Penta MD5A, MD5B, and MD5C marine engines. It ensures a proper seal to prevent coolant leaks and maintain optimal engine operating temperature.

It serves as a direct replacement for Volvo Penta part number 838013.

  • Installs on the thermostat housing.
  • Made from durable rubber to withstand engine conditions.
  • Ensures a reliable, leak-free seal.

Part Number Matrix

Use this matrix to confirm equivalent references across OEM and aftermarket.

Brand Part Number
Volvo Penta 838013

Engine & Model Compatibility

Confirm your engine model/year in the table below.

This gasket is used as a thermostat housing seal on the following Volvo Penta models.

Brand Model OEM Part No. Notes
Volvo Penta MD5A 838013 Thermostat housing rubber
Volvo Penta MD5B 838013 Thermostat housing rubber
Volvo Penta MD5C 838013 Thermostat housing rubber

Technical Specs

Product Type
Gasket / Seal
Installation
Thermostat Housing
Housing Material
Rubber
Dimensions
1.0 x 10.0 x 10.0
Weight
0.001 kg (0.0022 lb)
Warranty
Manufacturer's warranty (via supplier)

What’s in the Box

  • 1 x Gasket (838013)

Installation Notes

  1. Disconnect the battery and allow the engine to cool completely before starting.
  2. Drain the engine coolant to a level below the thermostat housing.
  3. Carefully remove the bolts securing the thermostat housing cover.
  4. Remove the old thermostat gasket and clean any residue from the mating surfaces of the housing and cover.
  5. Position the new gasket correctly on the thermostat housing.
  6. Reinstall the housing cover, ensuring it is seated properly, and tighten the bolts to the manufacturer's recommended torque specification.
  7. Refill the cooling system with the appropriate coolant, check for any leaks, and then reconnect the battery.

Troubleshooting & FAQ

How do I confirm this gasket fits my engine?

This gasket is specifically for Volvo Penta MD5A, MD5B, and MD5C engines. The most reliable way to confirm fitment is to check that your service manual specifies part number 838013 for the thermostat housing gasket.

What are the signs of a failing thermostat housing gasket?

Common symptoms include visible coolant leaks or dried coolant residue around the thermostat housing, steam from the engine bay, an overheating engine, or frequent low coolant levels without another obvious cause.

Can I reuse my old gasket after a repair?

No. Gaskets are single-use parts designed to crush and create a seal. Once removed, an old gasket will not provide a reliable seal and will likely cause leaks. Always use a new gasket during installation or reassembly.

How often should this gasket be replaced?

It is best practice to replace the thermostat housing gasket whenever the thermostat is replaced or the housing is removed for service. It should also be replaced immediately if any signs of leaking or material degradation are found.

Is this an OEM Volvo Penta part?

This listing is an aftermarket replacement (not OEM). It is built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, it is batch-inspected for consistency and quality.

What are the shipping speed and cost?

We ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free; expedited options appear at checkout where available.

What is the warranty and return policy?

This part is covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window for unused items in original condition. See our policy page or reach out for instructions.

Safety & Important Info

  • Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
  • This is an aftermarket replacement, not an OEM component.
  • Professional installation is recommended for safety and performance.

About Sea Sierra

  • Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
  • Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
  • Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.

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