# Valve seal wbk 3921640 – new

> Valve stem seal WBK 3921640 – durable, oil and heat resistant seal ensuring engine efficiency and reduced emissions.

- Category: [Gaskets](https://wibako.com/shop/diesel-engines-parts/gaskets.md)
- Manufacturer: wbk
- Part number: 3921640
- Stock number: 65431
- Condition: new
- Price: 1.54 EUR gross (1.25 EUR net)
- Availability: in stock

Valve seal wbk – new. Fits: Engine Cummins 4BT3.9, Engine Cummins 6BT5.9, Cylinder head for engine Cummins 5.9.

## Specification

- name: Valve seal
- mark: wbk
- part number: 3921640
- condition: new
- inner diameter: matched to valve stem
- outer diameter: matched to valve guide
- material: oil and heat resistant rubber
- spring: steel clamping

## Description

Valve seal wbk – new part offered by WIBAKO.

Fits: Engine Cummins 4BT3.9, Engine Cummins 6BT5.9, Cylinder head for engine Cummins 5.9.

Part number: 3921640. To be sure the part fits, compare the number on the nameplate or in the catalogue – or send us an enquiry with the part number or the machine (engine) serial number and we will confirm the fit.

Weight: 0.01 kg. Shipping: new parts ordered by 10:00 (CET) are dispatched the same working day, other orders the next working day.

We also carry out [diesel engine overhauls](https://wibako.com/services/overhauls-of-combustion-engines).

## Fits (machines and engines)

- Engine Cummins 4BT3.9
- Engine Cummins 6BT5.9
- Cylinder head for engine Cummins 5.9 3934783

## Reference numbers

3921640

## Guides and case studies

- [Service and Repair of Cummins 4BT3.9 Engine](https://wibako.com/about-us/service/532-service-and-repair-of-cummins-4bt3-9-engine.md)
- [Service and Repair of Cummins 6BT5.9 Engine](https://wibako.com/about-us/service/526-service-and-repair-of-cummins-6bt5-9-engine.md)
- [Overhaul of the Cummins 4BT3.9 Engine](https://wibako.com/about-us/news/316-overhaul-of-the-cummins-4bt3-9-engine.md)
- [Cummins 4BT3.9 Engine Overhaul](https://wibako.com/about-us/news/146-cummins-4bt3-9-engine-overhaul.md)

![Photo: Valve seal wbk 3921640](https://wibako.com/images/2142755_1758113997501_1000x1000.webp)

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Source: https://wibako.com/shop/diesel-engines-parts/gaskets/53465X65431-valve-seal-wbk-3921640
Contact: +48338704200, biuro@wibako.pl