Q: How Often Do Engine Motor Mounts Need to Be Replaced?

asked by on December 02, 2015

How often do engine motor mounts need to be replaced?

The engine motor mounts on most vehicles are designed to isolate the engine’s normal movements and vibrations from the vehicle frame and body so the operator of the vehicle will not feel them. In some vehicles the motor mounts are made from solid rubber and others may be hollow rubber with a liquid filling. The solid rubber ones are used in most vehicle engines, while the liquid filled ones are used in vehicles that need additional isolation between the engine and body.

The motor mounts are subject to wear and tear depending on age and how the vehicle is driven. A vehicle with a manual transmission may break motor mounts more often depending on the abuse from the shifting of the transmission. The age of the mounts will vary depending on location. Just like old tires start to dry rot and crack, so do the motor mounts’ rubber. A solid motor mount may tear partly and still work fine, but a liquid filled motor mount will leak out the liquid and the motor mount will no longer dampen vibrations from the motor.

In general, motor mounts do not have a scheduled replacement but should last between 5 to 10 years before dry rot or breaking from age-related failure. Motor mounts can get broken from slamming the vehicle, gears over-revving, and letting out clutch or power braking the engine before takeoff. Motor mounts can break in vehicle accidents too. If the motor mounts break due to harsh transmission shifting, the transmission mounts may also get damaged. I have seen mounts break in a year or less due to outside failures. Engine oil or other fluid leaks may get on the mounts, deteriorate the rubber, and cause it premature failure.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

I need the torque specs for my motor mounts

Hi, thanks for writing in about your 2005 Nissan Altima. The front motor mounts on your Nissan Altima should be torqued to ~65-77ft lbs. As you know, this can be a bit of a tough job in some cases. In...

rattling noise when engine idles. load engine noise during acceleration like glass packed muffler

This may be related to loose exhaust parts such as exhaust mounting brackets, or potentially a bad or failing catalytic converter. As you may know, the catalytic converter has a honeycomb-like structure inside of it which helps to convert toxic...

How do you know if its really a timing chain gasket? And how long does it take to repair?

It is more likely that the water pump is leaking from its front seal. The leak will show up from the center of the motor area and will drip off the bottom of the timing cover. The timing cover on...

Related articles

How to Replace a Head Gasket
The cylinder head gasket is a seal located between the engine block...
How Long Do Engine Motor Mounts Last?
Car motor mounts secure the engine to the chassis to absorb vibrations and keep the engine in place. Motor mounts last a long time, but they can fail.
How to Replace a Variable Valve Timing (VVT) Switch
An engine has a variable valve timing switch that fails when there is a reduction in engine power or the Check Engine Light illuminates.