AC DELCO MJ27G6 Rear Engine Mount Ls

( Brand: Ac Delco ), ( Manufacturer Part Number: MJ27G6 ), ( Part Type: Engine Mount ), ( Placement On Vehicle: Rear ), ( Product Warranty: 12 Month Warranty ), ( Part Info: Engine Mount New ), ( Years: 2015 2016 2017 2018 15 16 17 18 ), ( Makes: Chevrolet ), ( Models: City Express ), ( Important: Please Read All Notes Before Making This Purchase ), ( Cs-sku: 400 )

Review AC DELCO Rear Engine Mount Chevy City Express Ls New fits LT 2015–2018

The **AC Delco MJ27G6 Rear Engine Mount** is a high-performance, direct-fit replacement designed specifically for the 2015 through 2018 Chevrolet LS-series engines, including the 5.3L V8 found in models like the Silverado, Tahoe, Suburban, and Impala. Engineered to meet or exceed OEM specifications, this mount is crafted from durable, high-grade rubber and reinforced steel components to ensure long-lasting durability and optimal vibration dampening. The MJ27G6 is a precision-molded part, featuring a robust mounting bracket that securely attaches to the engine block while maintaining proper alignment with the transmission and frame rails, reducing engine movement and minimizing drivetrain strain. Ideal for both maintenance and performance applications, this mount helps maintain engine stability, reduces harshness during acceleration and braking, and contributes to a smoother, more refined ride. Whether you're addressing a worn-out original part or upgrading for enhanced durability, the AC Delco MJ27G6 is a reliable choice that combines quality engineering with easy installation, ensuring a seamless fit for your LS engine setup.

Buying the **AC Delco MJ27G6 rear engine mount** for a 2015 2018 Chevrolet LS platform vehicle has its advantages and drawbacks, depending on your priorities budget, performance, durability, and installation ease.

### **Pros of the AC Delco MJ27G6 Rear Engine Mount**

1. **OEM Quality and Fitment** AC Delco is a trusted aftermarket brand that closely replicates the original equipment manufacturer (OEM) design, ensuring proper fitment without major modifications. This reduces the risk of alignment or drivability issues compared to cheaper, non-OEM alternatives.

2. **Durability and Performance** The MJ27G6 is designed to handle the LS engine s weight and vibrations effectively, providing a stable mount that helps reduce engine movement. This can improve drivability, especially in rough roads or under heavy loads.

3. **Warranty Coverage** AC Delco parts often come with a manufacturer s warranty (typically 1 2 years), offering some peace of mind against premature failure. This is more reliable than no warranty at all.

4. **Compatibility with Aftermarket Upgrades** Since it matches the OEM specifications, it works well with common LS engine modifications, such as performance exhausts, intake systems, or even mild tuning. It won t interfere with aftermarket components that rely on stock mount positioning.

5. **Easier Installation** The design is straightforward, and many mechanics or DIYers can replace it without specialized tools. The mount is typically accessed from underneath the vehicle, though some LS platforms may require lifting for better access.

6. **Reliability in Stock Applications** For stock or lightly modified LS engines, the MJ27G6 provides adequate support without the need for premium or high-performance alternatives.

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### **Cons of the AC Delco MJ27G6 Rear Engine Mount**

1. **Cost Compared to Budget Alternatives** While not excessively expensive, the AC Delco mount is pricier than generic or no-name brands (often $30 $50 per mount). If you re on a tight budget, cheaper options may suffice for basic durability.

2. **Potential for Wear Over Time** Like all rubber engine mounts, the MJ27G6 will eventually degrade due to heat, vibration, and age. While AC Delco parts are durable, they are not indestructible and may still require replacement every 80,000 120,000 miles, depending on driving conditions.

3. **Limited Performance Benefits** If you re running a heavily modified engine (e.g., forced induction, high horsepower, or aggressive suspension tuning), the stock-style MJ27G6 may not provide the same level of isolation or support as a high-performance mount (e.g., **Eibach, Meziere, or Bilstein**). These mounts are designed to handle extra stress but come at a higher cost.

4. **Installation Challenges on Some LS Platforms** Depending on the specific vehicle (e.g., Silverado, Equinox, or Traverse), accessing the rear engine mount may require removing the underbody pan, exhaust, or other components. This can add labor time and complexity, especially for inexperienced installers.

5. **Potential for Misalignment** If the mount is not installed correctly (e.g., improper torque or misalignment with the engine), it could lead to drivability issues, such as a rough idle, vibration, or even damage to the mount itself. This risk exists with any engine mount, but proper installation is critical.

6. **Not Ideal for Extreme Conditions** In off-road or high-vibration environments (e.g., heavy-duty towing, frequent rough terrain), the MJ27G6 may wear out faster than a more robust mount. In such cases, a reinforced or high-performance mount would be a better long-term investment.

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### **Conclusion and Recommendation**

The **AC Delco MJ27G6 rear engine mount** is a solid, reliable choice for most **2015 2018 LS platform Chevy vehicles** running stock or mildly modified engines. It strikes a balance between cost, fitment, and durability, making it a practical option for everyday driving, light towing, or basic performance applications.

- You want a **direct OEM replacement** with minimal fitment issues.

- Your engine is **stock or lightly modified** (no extreme power levels).

- You prefer **brand-name reliability** over the cheapest possible option.

- You re comfortable with **basic installation** (or have a mechanic do it).

- You re running **high horsepower (300 HP) or forced induction**, where a **high-performance mount** (e.g., **Meziere 7000 series, Eibach, or Bilstein**) would be more appropriate.

- You re on a **tight budget** and can find a **highly rated generic mount** (e.g., **MagnaFlow, Carter**) that still meets your needs.

- Your vehicle sees **extreme use** (e.g., heavy towing, off-roading), in which case a **reinforced or polyurethane mount** may last longer.

**Final Verdict:** For the average LS owner, the **AC Delco MJ27G6 is a dependable and cost-effective choice** that won t let you down in normal driving conditions. If you re pushing the engine harder or want extra longevity, upgrading to a performance mount is worth considering. Otherwise, it s a safe and sensible upgrade.

Details:

Engine Mount New.

part #: mj27g6 prices

• $137.17-$149.57

specifications engimou:

• for models: Lt
• for makes: Chevy
• for years: 2015-2018
• brand: Ac Delco
• mpn: Mj27g6
• part type: Engine Mount
• placement on vehicle: Rear
• product warranty: 12 Month Warranty
• part info: Engine Mount New
• years: 2015 2016 2017 2018 15 16 17 18
• makes: Chevrolet
• models: City Express
• important: Please Read All Notes Before Making This Purchase
• cs-sku: 400

shipping engimou:

• type: Fixed
• transit: 3-7 Days
• class: Standard
• cost: $0.00
• service: FedEx Ground / FedEx Home Delivery
• carrier: FedEx

seller engimou:

• rating: 98.8%
• # reviews: 68771
• city: Chino, California

returns engimou:

• paid by: Seller
• time: 30 Days
• policy: Returns Accepted

offer engimou:

• availability: In Stock
• started: June 3, 2026
• sold: 0
• options: Ship-to-home
• quantity: 1

general engimou:

• condition: New
• Car Truck Parts Accessories > Engines Engine Parts > Engine Mounts

payments engimou:

• other
• wallet: Paypal
• credit card: Diners-club

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