# Thermostat seal Caterpillar C9/C10/C11/C12/C13/C15/C16/C18/C27/C30/C32 3S-9643 – new

> Discover our new lip seal ring 3S-9643 for rotary shafts, designed for construction machinery. This durable component ensures effective sealing, retains oil, and protects against contaminants. Made from high-quality materials, it offers reliability in extreme conditions. Optimize your machine's efficiency with this essential part.

- Category: [Gaskets](https://wibako.com/shop/diesel-engines-parts/gaskets.md)
- Manufacturer: Caterpillar
- Part number: 3S-9643
- Stock number: 45913
- Condition: new
- Price: 14.01 EUR gross (11.39 EUR net)
- Availability: in stock

Thermostat seal Caterpillar C9/C10/C11/C12/C13/C15/C16/C18/C27/C30/C32 – new. Fits: Engine Caterpillar 3306, Engine Caterpillar 3304, Engine Caterpillar C9 and others.

## Specification

- name: Thermostat seal
- mark: Caterpillar
- type: C9/C10/C11/C12/C13/C15/C16/C18/C27/C30/C32
- part number: 3S-9643
- condition: new
- shaft diameter: 57.72 mm
- outer diameter: 67.59 mm
- width: 6.35 mm
- hole diameter: 67 mm
- material: FKM, PTFE, Carbon Steel, Alloyed Copper, Stainless Steel, Plastic

## Description

Caterpillar 3S-9643 thermostat seal for Caterpillar 3304, 3306 and C9 to C32 series engines, weight 0.02 kg. The seal closes the joint between the thermostat and its housing and keeps the coolant from escaping. It is a round ring with a metal collar and a yellowish rubber lip. New part. Before ordering, compare the number and the outer diameter with the seal removed from your thermostat housing.

Fits: Engine Caterpillar 3306, Engine Caterpillar 3304, Engine Caterpillar C9, Engine Caterpillar 3406, Engine Caterpillar C15, Engine Caterpillar C12, Engine Caterpillar 3408, Engine Caterpillar 3412 and others. Full list in the “Applications” tab.

Part number: 3S-9643. 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: 0.02 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 Caterpillar 3306
- Engine Caterpillar 3304
- Engine Caterpillar C9
- Engine Caterpillar 3406
- Engine Caterpillar C15
- Engine Caterpillar C12
- Engine Caterpillar 3408
- Engine Caterpillar 3412
- Engine Caterpillar C18
- Engine Caterpillar C10
- Engine Caterpillar C32
- Engine Caterpillar 3176
- Engine Caterpillar 3196
- Engine Caterpillar C13
- Engine Caterpillar 3508
- Engine Caterpillar 3512
- Engine Caterpillar 3516
- Engine Caterpillar C11
- Engine Caterpillar C27
- Engine Caterpillar 3456
- Engine Caterpillar 3606
- Engine Caterpillar 3608
- Engine Caterpillar 3612
- Engine Caterpillar 3616
- Engine Caterpillar C16
- Engine Caterpillar C30

## Reference numbers

3S-9643, C9/C10/C11/C12/C13/C15/C16/C18/C27/C30/C32

## Guides and case studies

- [Caterpillar C15 Engine Overhaul](https://wibako.com/about-us/news/226-caterpillar-c15-engine-overhaul.md)

![Photo: Thermostat seal Caterpillar C9/C10/C11/C12/C13/C15/C16/C18/C27/C30/C32 3S-9643](https://wibako.com/images/1910697_1635925769387_1000x1000.webp)

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Source: https://wibako.com/shop/diesel-engines-parts/gaskets/37854X45913-thermostat-seal-caterpillar-c9-c10-c11-c12-c13-c15-c16-c18-c27-c30-c32-3s-9643
Contact: +48338704200, biuro@wibako.pl