Engine washer – sealing and load distribution for engines
An engine washer is a small yet critical component used in engine assembly to distribute pressure, prevent loosening, and ensure tight seals between fastened surfaces. Whether used under bolts, nuts or screws, the right engine washer supports structural integrity and protects sensitive engine parts. In both marine and industrial engines, high-quality engine washers are essential for reliability and long-term performance.
PLAIN WASHER - 04417129 suitable for MWM & Deutz engines
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SHIM - 04416390 suitable for MWM & Deutz engines
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PLAIN WASHER - 04416733 suitable for MWM & Deutz engines
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SHIM - 04417147 suitable for MWM & Deutz engines
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SHIM - 04416569 suitable for MWM & Deutz engines
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PLAIN WASHER - 04417024 suitable for MWM & Deutz engines
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PLAIN WASHER - 04405987 suitable for MWM & Deutz engines
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SHIM RING - 04396328 suitable for MWM & Deutz engines
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PLAIN WASHER - 04417030 suitable for MWM & Deutz engines
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PLAIN WASHER - 04417022 suitable for MWM & Deutz engines
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PLAIN WASHER - 04417078 suitable for MWM & Deutz engines
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PLAIN WASHER - 04417183 suitable for MWM & Deutz engines
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SHIM - 04424406 suitable for MWM & Deutz engines
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PLAIN WASHER - 04417065 suitable for MWM & Deutz engines
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HALF-RING - 04395323 suitable for MWM & Deutz engines
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SHIM - 04417287 suitable for MWM & Deutz engines
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WASHER - 04404861 suitable for MWM & Deutz engines
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SPACER - 04417528 suitable for MWM & Deutz engines
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PLAIN WASHER - 04417185 suitable for MWM & Deutz engines
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CLAMPING WASHER - 04903351 suitable for MWM & Deutz engines
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SHIM - 04416508 suitable for MWM & Deutz engines
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SPRING WASHER - 04408673 suitable for MWM & Deutz engines
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SPACER RING - 04443178 suitable for MWM & Deutz engines
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PLAIN WASHER - 04396402 suitable for MWM & Deutz engines
Qualitative Plain washer 04396402 for successful enginesDiscover our OEM replacement part, the plain washer with the comparison number 04396402. This central product is specifically designed to meet the requirements of MWM & Deutz engines. With this plain washer, you meet the highest standards of quality and functionality.
Function and advantages
Engine washers serve several key functions in engine construction and repair. They are used to:
- Distribute clamping force evenly across surfaces
- Protect soft materials or coatings from fastener damage
- Improve sealing and prevent loosening due to vibration
In dynamic applications, engine washers also help compensate for thermal expansion, surface irregularities and pressure shifts within the engine block or housing.
Types and applications
Engine washers are used across all major engine components – from cylinder heads and manifolds to oil pans, pumps and brackets. Common types include:
- Flat washers for load distribution
- Spring washers for vibration resistance
- Sealing washers (e.g. copper or rubberized) for fluid-tight joints
Each engine washer must be matched to the specific fastener size, torque requirement and environmental condition. In marine and high-vibration engines, corrosion-resistant and locking washer types are preferred.
Materials and availability
Engine washers are typically made from hardened steel, stainless steel, brass, aluminum or copper – depending on application and environment. Coated variants help prevent corrosion and galling. We offer a wide range of engine washers for MTU, MAN, Volvo Penta, Deutz and MWM engines – in OEM-compatible quality and with fast availability.
FAQ
What is an engine washer used for?
An engine washer is placed under a nut, bolt or screw to distribute pressure, improve grip and prevent damage to surrounding surfaces. It also helps maintain torque and sealing under heat, pressure and vibration.
Are all engine washers the same?
No. Engine washers vary in size, thickness, material and function. Some are designed for sealing, others for locking or vibration damping. Using the correct washer type is critical for safety and performance.
When should engine washers be replaced?
Engine washers should be replaced during engine overhauls, when fasteners are removed, or when there are signs of wear, corrosion or deformation. Reusing worn washers can lead to leaks or torque loss.