How Long Should Engine Mounts Last?

Engine mounts typically last anywhere from 60,000 to 100,000 miles before needing replacement. The exact lifespan depends on mount type, quality, driving conditions, maintenance, and mileage accrued.

This article will explore the key factors impacting mount durability, how to extend their lifespan, recommended inspection intervals, common failure causes, whether it’s safe to drive with a damaged mount, if all mounts should be replaced together, and the critical role engine mounts play in vehicle function.

We’ll provide a detailed look at how long engine mounts can be expected to last, and how to preserve them for maximum longevity.

How Long Should Engine Mounts Last?

Engine mounts are rubber pieces that connect the engine to the frame of your vehicle. They absorb engine vibrations and noise, allowing for a smoother, quieter ride. So how long should engine mounts last before needing to be replaced?

The average lifespan of engine mounts is 60,000 to 100,000 miles. However, this can vary substantially depending on the type and quality of the mounts, driving conditions, vehicle maintenance, and mileage.

Factors That Affect Engine Mount Lifespan

• The type of engine mounts – Original equipment manufacturer (OEM) mounts built specifically for your vehicle model tend to last the longest. Aftermarket mounts may deteriorate faster.
• Mount quality – Higher quality mounts made with stiffer rubber blends withstand more stress and last longer. Cheaper mounts wear out faster.
• Driving conditions – Frequent stop-and-go driving, potholes, curbs, and rough terrain accelerate wear. Highway miles are gentler on mounts.
• Vehicle maintenance – Neglected vehicles with infrequent oil changes cause mounts to fail sooner. Proper maintenance extends their life.
• Mileage – The more miles driven, the more wear inflicted on mounts over time shortening their lifespan.

How to Extend Engine Mount Lifespan

• Avoid potholes and curbs – Jarring impacts hasten deterioration. Drive carefully over rough terrain.
• Prevent sudden acceleration/braking – Aggressive driving puts extra stress on mounts, expediting damage. Accelerate and brake smoothly. 
• Get regular tune-ups – Well-tuned engines vibrate less with cleaner combustion minimizing mount strain.
• Change oil regularly – Dirty oil contains abrasive particles that can damage mount rubber. Follow factory oil change intervals.
• Have mounts inspected – Mechanics can check for signs of cracking, liquefaction or separation. Address issues promptly.

How Often to Inspect Engine Mounts

Engine mounts should be inspected by a qualified mechanic during routine maintenance every 30,000 miles or 2 years. Additionally, check mounts immediately if you feel excessive vibration in the cabin or notice the clunk of mount failure over bumps. Catching and replacing deteriorating mounts early prevents further vehicle damage.

What Causes Engine Mounts to Fail

There are several root causes of mount degradation:

• Heat – Engine heat dries out and cracks rubber over time. Hardened, brittle mounts are prone to detach from metal brackets.
• Oil contamination – Leaking or spilled oil degrades and swells the rubber.
• Vibration – Constant shaking loosens mounts and induces cracks.
• Metal corrosion – Rust on mount brackets or bolts leads to separation.
• Accidents – Major impacts like collisions can displace or instantly break mounts.

Can You Drive With a Bad Engine Mount?

It’s not recommended to continue driving with a severely damaged engine mount. The consequences can be:

• Excessive cabin vibration
• Mount or engine bracket damage
• Misaligned drivetrain components
• Failed motor mounts can lead to catastrophic engine displacement or detachment. Have bad mounts replaced immediately.

Should All Engine Mounts be Replaced at Once?

Replacing all engine mounts simultaneously is ideal but not always necessary. If one mount is clearly worn or broken while the rest appear intact, just replacing the failed one is acceptable. However, if multiple mounts are degraded, replacing them all helps ensure proper engine support and positioning. Mixing a new mount with deteriorating ones risks uneven engine stresses.

Why Are Engine Mounts Important?

Properly functioning engine mounts:

• Absorb engine vibrations preventing cabin shakes
• Allow the engine/transmission to pivot on their axes without constraint
• Support the weight of the engine
• Keep the engine aligned and positioned correctly
• Prevent excessive movement that could damage hoses and wires
• Help minimize noise and harshness from the powertrain

In summary

Engine mounts are crucial components with an average lifespan of 60,000-100,000 miles depending on conditions and maintenance. Inspect them regularly and replace any degraded mounts promptly to prevent further vehicle damage. With care, engine mounts can reliably isolate engine vibrations for years.