--- title: When to Replace a Viscous Crankshaft Damper - Vibratech TVD description: Worn out viscous crankshaft dampers do not protect from torsional vibration and lead to costly engine damage and downtime. Choose Vibratech replacements. --- [![Vibratech TVD - Torsional Viscous Dampers](https://www.vibratechtvd.com/hs-fs/hubfs/IMAGES-web/logo-VB.png?width=298&height=136&name=logo-VB.png "Vibratech TVD - Torsional Viscous Dampers")](https://www.vibratechtvd.com/?hsLang=en) - [OEM SERVICES](https://www.vibratechtvd.com/oem-services?hsLang=en) - [VISCOUS DAMPERS](https://www.vibratechtvd.com/torsional-dampers?hsLang=en) - [Benefits](https://www.vibratechtvd.com/torsional-dampers?hsLang=en#benefits) - [How it Works](https://www.vibratechtvd.com/torsional-dampers?hsLang=en#howitworks) - [Crankshaft Dampers](https://www.vibratechtvd.com/torsional-dampers?hsLang=en#crankshaft) - [Camshaft Dampers](https://www.vibratechtvd.com/torsional-dampers?hsLang=en#camshaft) - [Driveline Dampers](https://www.vibratechtvd.com/torsional-dampers?hsLang=en#drivelinedampers) - [Electric Drive Dampers](https://www.vibratechtvd.com/torsional-dampers?hsLang=en#edrive) - [INDUSTRIES](https://www.vibratechtvd.com/industries?hsLang=en) - [On-Highway](https://www.vibratechtvd.com/on-highway?hsLang=en) - [Off-Highway / Machine](https://www.vibratechtvd.com/off-highway-machinery?hsLang=en) - [Oil, Gas & Energy](https://www.vibratechtvd.com/oil-gas-energy?hsLang=en) - [Marine](https://www.vibratechtvd.com/marine?hsLang=en) - [Motorsports](https://www.vibratechtvd.com/motorsports?hsLang=en) - [Defense](https://www.vibratechtvd.com/defense?hsLang=en) - [Rail](https://www.vibratechtvd.com/rail?hsLang=en) - [CATALOG DAMPERS](https://www.vibratechtvd.com/catalog-dampers?hsLang=en) - [Caterpillar](https://www.vibratechtvd.com/caterpillar-replacement-dampers?hsLang=en) - [Cummins](https://www.vibratechtvd.com/cummins-replacement-dampers?hsLang=en) - [Detroit Diesel](https://www.vibratechtvd.com/detroit-diesel-replacement-dampers?hsLang=en) - [International/Navistar](https://www.vibratechtvd.com/international-navistar-replacement-dampers?hsLang=en) - [Mack](https://www.vibratechtvd.com/mack-replacement-dampers?hsLang=en) - [Cooper / GE / Mitsubishi / Waukesha](https://www.vibratechtvd.com/cooper-ge-mitsubishi-waukesha?hsLang=en) - [> When To Replace](https://www.vibratechtvd.com/when-to-replace-damper) - [> Where To Buy](https://www.vibratechtvd.com/where-to-buy?hsLang=en) - [> Remanufacturing](https://www.vibratechtvd.com/remanufacturing-program?hsLang=en) - EDUCATE - [Tech Articles](https://www.vibratechtvd.com/tech-articles?hsLang=en) - [VIBRA-BLOG](https://blog.vibratechtvd.com/vibra-blog?hsLang=en) - [COMPANY](https://www.vibratechtvd.com/about-us?hsLang=en) - [About Us](https://www.vibratechtvd.com/about-us?hsLang=en) - [Machining Services](https://www.vibratechtvd.com/horschel-brothers-precision?hsLang=en) - [Contact](https://www.vibratechtvd.com/contact?hsLang=en) # When to replace a viscous damper Choose high quality Vibratech when it's time. A worn out viscous crankshaft damper will not protect from torsional vibration which will lead to costly engine damage and downtime.  That’s why regular viscous damper replacement in heavy-duty applications is critical to longer engine life.  While recommended replacement intervals vary depending on engine manufacturer, the average is about **500,000 miles / 15,000 hours** or at major overhauls and in-frame rebuilds. [Where To Buy](https://www.vibratechtvd.com/where-to-buy?hsLang=en) [More Information on Viscous Dampers](https://www.vibratechtvd.com/torsional-dampers?hsLang=en) ## REGARDLESS OF miles or HOURS, REPLACE IF: - There are any signs of abuse or dents to the outer housing. - There are any leaks around housing weld. - There is bulging of the housing cover. - There are any vibrations in the engine. ## SIGNS OF VISCOUS DAMPER WEAR: - Excessive bearing wear - Broken crankshaft - Broken camshaft - Accessory drive gear wear - Broke accessory brackets - Loosening or broken bolts - Throwing or slapping of belts - Loss of torque and horsepower - Loss of fuel economy - Damper housing damage - Driver fatigue  Vibratech TVD has been a supporter of the American trucking industry for over 70 years. **NOTE** Replacing or servicing a worn out damper does not correct damage already done from abuse, but it will help protect your rebuild investment, contribute to overall operating efficiency and prolong engine life. ![](https://www.vibratechtvd.com/hubfs/IMAGES-web/TECH%20ARTICLES/lib-icon-service-essential.png) [Get Tech Article](https://info.vibratechtvd.com/tech-articles/essential-heavy-duty-damper-service?hsLang=en) ## VISCOUS DAMPER SILICONE FACTS - Silicone is an excellent damping medium due to its high energy dissipation. - Silicone in a new damper is approximately 45,000 times thicker than 30w motor oil. - Protects across a broad range of rpm and frequency ranges. - Normal operating conditions will cause silicone to gradually harden over an extended period of time in heavy-duty applications. - If not replaced at the recommended interval, silicone could eventually polymerize into a solid paste and lock the internal inertia ring.     > Truck service centers, fleet maintenance shops,  diesel engine repair facilities, and engine remanufacturers all trust Vibratech replacement dampers.   ![whenreplace-badamprV2](https://www.vibratechtvd.com/hubfs/IMAGES-web/whenreplace-badamprV2.png "whenreplace-badamprV2") *This O.E. damper was not changed during rebuild. This lead to engine failure within two months. Dark patches indicate worn out silicone.* ![Vibratech TVD](https://www.vibratechtvd.com/hs-fs/hubfs/IMAGES-web/logo-VB.png?width=180&height=82&name=logo-VB.png) 180 Zoar Valley Road Springville, NY 14141  USA **Contact Us** (716) 592-1000 [sales@VibratechTVD.com](mailto:sales@vibratechtvd.com) Mon-Thurs (8am - 4:30pm EST) \* Fri (7am - 3:30pm EST) © 2026, Vibratech TVD • [Horschel Companies](http://www.horschel.com/) Member [Copyright / Disclaimers / Accessibility Statement / Privacy Statement](https://vibratechtvd.hs-sites.com/copyright-disclaimer?hsLang=en) ![PROTECTING THE ENGINES THAT MOVE THE WORLD](https://www.vibratechtvd.com/hs-fs/hubfs/IMAGES-web/INTERFACE/footer-engines.jpg?noresize&width=542&height=72&name=footer-engines.jpg) [![Twitter](https://www.vibratechtvd.com/hubfs/IMAGES-web/ICONS/twitter-icon.png)](https://twitter.com/vibratechtvd) [![Linkedin](https://www.vibratechtvd.com/hubfs/IMAGES-web/ICONS/linkedin-icon.png)](https://www.linkedin.com/company/vibratech-tvd/)