Oil Dipstick Cover Gasket – Fits Yanmar 3GM Series Marine Diesel Engines (Replaces 124160-34845)
Oil Dipstick Cover Gasket – Fits Yanmar 3GM Series Marine Diesel Engines (Replaces 124160-34845) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
Worry-free returns
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.).
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Oil Dipstick Cover Gasket – Fits Yanmar 3GM Series Marine Diesel En...
Product Details
This high-quality Oil Dipstick Cover Gasket provides a reliable seal for Yanmar 3GM, 3GM-D, 3GM-F, 3GM30, 3GM30F, and 3GM30F-YEU series marine diesel engines (1980s–2000s). It is engineered to prevent messy oil leaks around the dipstick and maintain correct crankcase pressure for optimal engine performance.
It serves as a direct replacement for Yanmar part numbers 124160-34845 and 124160-34844.
- Material: Made from durable, oil-resistant nitrile rubber (NBR) for a long service life.
- Installation: Simple hand installation; a light coating of engine oil on the gasket is recommended.
- Function: Creates a tight, dependable seal on the oil dipstick cover to prevent leaks.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket suppliers.
| Brand | Part Number |
|---|---|
| Yanmar | 124160-34845 |
| Yanmar | 124160-34844 |
Engine & Model Compatibility
Confirm your engine model in the table below to ensure accurate fitment.
This part is designed for specific Yanmar marine diesel engines.
| Brand | Model | Rated HP | Stroke | OEM Part No. |
|---|---|---|---|---|
| Yanmar | 3GM | 4-Stroke | 124160-34845 | |
| Yanmar | 3GM-D | 4-Stroke | 124160-34845 | |
| Yanmar | 3GM-F | 4-Stroke | 124160-34845 | |
| Yanmar | 3GM30 | 27 | 4-Stroke | 124160-34845 |
| Yanmar | 3GM30F | 27 | 4-Stroke | 124160-34845 |
| Yanmar | 3GM30F-YEU | 27 | 4-Stroke | 124160-34845 |
Technical Specs
- Product Type
- Oil Dipstick Cover Gasket
- Material
- Oil-resistant nitrile rubber (NBR)
- Thickness
- 2 mm
- Operating Temperature
- -40°C to 150°C (-40°F to 302°F)
- Weight
- 0.01 kg (0.02 lb)
- Package Size
- 8 cm × 6 cm × 0.1 cm
- Other Technical Attributes
- Prevents oil leaks and maintains proper crankcase pressure
What’s in the Box
- 1 x Cover Gasket Oil Dipstick (Replaces 124160-34845)
Installation Notes
- Ensure the engine is off and cool to the touch.
- Locate and remove the oil dipstick.
- Carefully pry off the old gasket from the dipstick cover. Clean any dirt or oil residue from the sealing surface.
- Lightly lubricate the new gasket with fresh engine oil to ensure a smooth fit. - Press the new gasket evenly and firmly into place by hand.
- Reinsert the oil dipstick and ensure it is fully seated to complete the seal.
Troubleshooting & FAQ
How do I know if my oil dipstick gasket is failing?
Common signs of a worn or failing gasket include visible oil residue or seepage around the dipstick handle, a loose-fitting dipstick, or a cracked and brittle appearance of the gasket itself.
What can happen if I ignore a leaking gasket?
Ignoring a leak can lead to a messy engine bay, incorrect oil level readings, and loss of crankcase pressure, which can negatively affect engine performance and efficiency over time.
Is any special tool needed for installation?
No special tools are required. Installation can be done by hand. A small, flat tool may help remove the old gasket, but be careful not to scratch the dipstick cover.
How often should this gasket be replaced?
There is no fixed replacement interval. Inspect the gasket during routine oil changes and replace it if it appears hardened, cracked, or is no longer providing a tight seal.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost?
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns?
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 (unused & 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.
Payment & Security
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