Views: 0 Author: Site Editor Publish Time: 01-08-2026 Origin: Site
Manufacturer: Hebei Huami New Material Technology Co., Ltd. (China)
Modern heavy-duty Mercedes-Benz trucks operate under continuous high load, long idle times, frequent torque fluctuations, and harsh road inputs. In this environment, the Mercedes truck engine mount is not a simple “rubber block”—it is a tuned NVH component that stabilizes the powertrain, protects the drivetrain, and reduces fatigue damage to surrounding structures. This article focuses on Mercedes-Benz engine mount replacement for OEM 3872400317, explaining function, structure, materials, failure symptoms, installation notes, and how Huami ensures durability and batch consistency for B2B supply.
An engine mount supports the static and dynamic loads of the engine assembly. In a heavy truck, mounts must hold alignment between engine–clutch–transmission–driveshaft under acceleration, braking, and uneven road inputs. When alignment drifts, accessory brackets, exhaust connections, and drivetrain joints experience abnormal stress.
Diesel combustion and rotating imbalance generate vibrations across a wide frequency band. A well-designed mount uses rubber damping to reduce vibration transmission into the cab and chassis—especially at idle and low RPM, where drivers most notice shake. During gear changes and torque reversals, the mount also absorbs impact loads that would otherwise hit the frame and transmission supports.
Lower NVH is not just “comfort.” It protects:
Frame brackets & crossmembers from fatigue cracks
Transmission housing and bell housing from repeated shock loading
Radiator hoses, charge-air pipes, exhaust joints from accelerated wear
Electrical connectors and sensor harnesses from vibration-induced failures
For long-haul fleets, high mileage and long hours at steady torque amplify fatigue cycles. For construction and heavy haul, repeated shock inputs and torsional events accelerate rubber aging and adhesive stress. Selecting a durable truck engine mount replacement reduces downtime, secondary damage risk, and total cost of ownership.
Part type: Rubber-Metal Engine Mount
OEM reference: 3872400317
Typical use: Mercedes-Benz truck powertrain mounting system (engine support / isolation)
Note: Exact vehicle platform and engine configuration can vary by market and model year. Fitment should be confirmed by OEM number, drawings, or sample comparison.
Depending on the chassis design, mounts may be positioned as:
Front support (engine front bracket area)
Rear support (near transmission interface / rear engine support)
Side mounts (left/right on engine cradle or frame brackets)
For 3872400317, the final location is determined by the truck’s mounting architecture.
A rubber-metal engine mount typically includes:
Metal bracket / outer shell: carries load and interfaces with chassis
Elastomer damping body: controls stiffness and damping
Bonded interface (adhesive + vulcanization): ensures rubber-metal integrity
Optional: limiters / voids / buffers to tune stiffness and travel limits
The design is a balance of:
Vertical stiffness (support)
Fore-aft stiffness (torque control)
Lateral stiffness (handling stability)
Damping (NVH control)
Huami selects elastomer systems based on temperature, oil exposure, and fatigue targets. Common options include:
NR (Natural Rubber): excellent dynamic fatigue resistance and damping for many mount designs
NBR (Nitrile Rubber): improved oil resistance for areas with hydrocarbons / oil mist
EPDM: strong heat and ozone resistance for certain environments (selection depends on oil exposure)
Blends / special formulations: tuned for high damping and durability under heavy duty cycles
(Final values depend on drawing and validation plan.)
Hardness (Shore A): ~55–85 Shore A (typical mount range)
Oil resistance: tailored via NBR or special blend where needed
Fatigue durability: optimized via compound design + bonding process + geometry tuning
Compression set control: critical for long-term height retention under constant load
High damping reduces amplitude near resonance zones and minimizes vibration transfer to the cab and frame. For heavy trucks, improved damping also helps during:
Idle shake
Low-speed lugging
Gearshift events
Road shock coupling into the powertrain
For long service life, the mount’s metal parts should withstand moisture and road salt. Huami applies corrosion protection and controls bonding quality through:
Surface preparation (cleaning / shot blasting or equivalent)
Primer + bonding system selection
Controlled vulcanization parameters (temperature, time, pressure)
Bond strength verification to prevent debonding in service
Fleet managers and workshops often search after a symptom appears. The following are strong indicators for checking the Mercedes truck engine mount:
If the cab shakes noticeably at idle (or vibration increases with light throttle), mount stiffness/damping may have degraded or the rubber has cracked internally.
Worn mounts allow larger powertrain movement. During shifts or torque reversals, the engine moves and impacts limiters or brackets, creating a thump or harshness.
A collapsed mount can lower engine height, changing driveline angles. This may lead to:
accelerated universal joint wear
exhaust misalignment
abnormal fan shroud clearance issues
Cracking: ozone/heat aging or fatigue
Swelling/softening: oil or chemical exposure
Debonding: rubber peeling from metal due to bonding failure or overload events
Visual inspection with good lighting
Pry-bar test for excessive movement (within safe procedure)
Compare left/right mount height (if symmetrical system)
Look for metal-to-metal contact marks and torn buffers
Confirm by road test: vibration, thump, and resonance changes
If one mount fails, workshops often inspect the entire mounting system (engine + transmission supports) to avoid repeated comebacks.
Safety first: engine mounts carry load. Improper support can cause injury or component damage.
Use proper engine support equipment (jack + cradle / hoist)
Release load gradually before removing mount fasteners
Inspect bracket holes, bolts, and mating surfaces for wear
Replace damaged fasteners per workshop standards
Install mount without pre-loading or twisting the rubber body
Mount-to-frame bolt torque: [To be confirmed by model/service manual]
Mount-to-engine bracket torque: [To be confirmed]
Correct torque is essential to prevent loosening and to ensure proper clamp load for fatigue life.
Confirm clearance around exhaust, hoses, and fan shroud
Verify engine height and alignment
Road test for vibration improvement and abnormal noises
Re-check bolts after initial run-in if service procedure requires
Fix oil leaks early (oil accelerates rubber aging in many compounds)
Avoid prolonged high-torque lugging and harsh clutch engagement where possible
Maintain drivetrain alignment to reduce mount stress
Inspect mounts during scheduled maintenance intervals
Huami’s engine mount manufacturing is built for B2B requirements: consistent performance, stable lead times, and documented quality.
30+ years in rubber products and rubber-metal components
Supply experience across automotive, heavy trucks, construction machinery, high-speed rail, and aerospace-related applications (project-based)
Quality system: IATF 16949 (automotive quality management)
Third-party compliance: TÜV certification
Trade facilitation: AEO Advanced Certification for customs efficiency and reliability
Huami develops and adjusts rubber formulations to meet targets such as:
high damping for NVH
oil resistance where needed
heat aging control
low compression set for long-term height retention
reinforced fatigue performance for long-haul duty cycles
Precision molds and controlled vulcanization
Process standardization for large-volume repeat orders
Incoming material control and traceability for stable compound behavior
Typical checks for rubber-metal mounts include:
Hardness (Shore A)
Tensile strength and elongation
Tear strength
Compression set
Bond strength (rubber-to-metal adhesion)
Oil resistance, heat aging, salt spray (metal), thermal cycling
Fatigue / durability evaluations (per project validation plan)
OEM/ODM support (drawing- or sample-based)
Low MOQ options for trial orders
Rapid sampling and stable production scheduling for repeat supply
Final dimensions and performance specs should be confirmed by drawing, sample, or vehicle platform.
| Category | Parameter | Value |
|---|---|---|
| Dimensions | Height | 128 mm |
| Dimensions | Length | 160 mm |
| Dimensions | Width | 141 mm |
| Specification | Mounting position | Front |
| Specification | Internal thread | M12×1.5 |
| Specification | Depth | 16 mm |
| Specification | Internal thread 1 | M16×1.5 |
| Specification | Net weight | 4.816 kg |
| Shipping details | Shipping weight | 5.01 kg |
| Shipping details | HS code | 401699 |
| Shipping details | Country of origin | China |
Is OEM 3872400317 compatible with all Mercedes-Benz trucks?
Not necessarily. Compatibility depends on model platform, engine type, and production year. Confirm by OEM number, drawings, or sample comparison.
What are the typical symptoms of a failed engine mount?
Excessive vibration at idle, harsh shift shock, thumping noises, engine sagging, and visible rubber cracking or separation.
Which rubber material is best for engine mounts—NR, NBR, or EPDM?
It depends on temperature and oil exposure. NR often offers excellent fatigue resistance; NBR improves oil resistance; EPDM suits heat/ozone environments where oil exposure is limited.
How long does a truck engine mount usually last?
Service life varies by duty cycle, road conditions, and engine torque events. Preventing oil leaks and maintaining alignment can extend life.
Can I replace only one mount?
Workshops often inspect the entire mounting system. Replacing one may be acceptable, but uneven stiffness/height can cause repeat issues.
Do you support OEM/ODM for engine mounts?
Yes. Huami supports drawing- or sample-based customization, including compound tuning for damping and durability.
How do you ensure rubber-to-metal bonding reliability?
Controlled surface preparation, bonding system selection, vulcanization parameters, and bond strength inspection help prevent debonding.
What quality tests are performed before shipment?
Common checks include hardness, tensile/tear, compression set, adhesion, and project-based aging or oil resistance tests.
