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Views: 0 Author: Site Editor Publish Time: 02-09-2026 Origin: Site
An engine mount is a critical rubber-metal component that connects the “engine/transmission assembly” to the frame (or subframe). For MAN trucks operating under heavy loads and long-haul duty cycles, an engine mount must not only “hold the powertrain,” but also “control movement and isolate vibration.”
Load bearing & positioning: The mount carries the static load of the engine and powertrain, ensuring the engine operates at the designed position and maintaining stable drivetrain geometry (e.g., driveshaft angles, alignment, clearances).
Movement control: During acceleration, braking, climbing, and cornering, torque reaction forces cause the powertrain to move in multiple directions. The mount limits displacement through engineered stiffness and rubber elasticity, preventing excessive “powertrain shift.”
Engine excitation: Idle fluctuation, combustion pressure variation, and uneven combustion generate periodic vibration; heavy-duty diesel platforms typically show stronger low-frequency vibration energy.
Road shock: Potholes, washboard roads, and payload impacts transmit through the frame. The mount acts as an “elastic isolation layer,” reducing peak shock and protecting engine accessories and lines (intake/exhaust, cooling, fuel/oil circuits).
Isolation as the NVH foundation: The rubber damping converts low-frequency vibration energy into heat dissipation, reducing resonance transmitted to the cab and body structure.
Lower structure-borne noise: When vibration transfers through metal structures and excites panels, noise is amplified. High-damping rubber significantly reduces structure-borne noise transmission paths.
In long-term high-load operation, the engine mount faces:
Thermal–oil–fatigue coupling: Heat, oil exposure, and repeated loading accelerate rubber aging and bonding-interface fatigue.
One failure, multiple chain issues: Reduced mount performance changes powertrain posture, leading to driveline misalignment, bracket cracking, hose abrasion, fastener loosening, and other reliability risks—ultimately affecting uptime.
Standard format: 81962100571
Common search/input formats: 81962100571 / 81.96210-0571 / 81 96210 0571 (different systems use different separators)
This part number is commonly cross-referenced in the aftermarket with:
81962100620 / 81962100562 / 81962100575 / 81962100577
Note: Cross references usually come from catalog mapping, similar structures, or supplier transitions. For purchase confirmation, verify by OEM number + overall dimensions + mounting holes/bracket structure, not by number alone.
Matched load & dynamic displacement: MAN powertrains produce high torque and operate in harsh duty cycles, requiring strong load capacity and movement control.
Balanced damping & stiffness: The mount must deliver both comfort (isolation) and control (anti-shift/anti-impact), relying on the right compound and hardness window.
Environmental resistance: Heat, oil, salt spray, and long-term fatigue require stable rubber properties and reliable vulcanized bonding.
Depending on the MAN truck model, the engine mount may be located at:
Front mount: near the engine front end or front crossmember
Rear mount: near the flywheel housing or transmission connection area
Side mounts (left/right): on both sides where the engine connects to the frame
Because MAN model architectures vary, confirm by the old part and mounting position before a MAN engine mount replacement.
A Rubber-Metal Engine Mount typically includes:
Metal core/bracket: load bearing and positioning, provides mounting interface
Rubber elastomer: elasticity, damping, vibration isolation, and movement limiting
Critical interface: vulcanized bonding layer: determines durability and anti-debonding performance
NR (Natural Rubber): excellent elasticity and dynamic performance; ideal when isolation and fatigue performance are priorities
NBR (Nitrile Rubber): stronger oil resistance; suitable for frequent oil exposure environments
EPDM: outstanding weather and ozone resistance; suitable for wide temperature swings and salt-spray routes
Final compound selection is engineered by mount location (front/rear/side), exposure media (oil/water/salt), target service life, and load spectrum.
Engine mounts operate within a controlled Shore A hardness window (customizable). Key impacts:
Lower hardness: better isolation, but reduced load/movement control—may cause posture instability and amplified impacts
Higher hardness: stronger load capacity and reduced displacement, but weaker isolation and worse NVH—may even trigger structural resonance
Hebei Huami New Material can offer high-damping, long-life, heavy-duty reinforced solutions to balance isolation and control.
Heat resistance: maintains stability under engine-bay temperatures without softening and losing control
Oil resistance: reduces swelling and property degradation from oil soak
Fatigue resistance: maintains elasticity and bonding strength under long mileage cyclic loading
Weather/ozone resistance: suppresses cracking and surface aging, supporting multi-climate transport routes
Surface cleaning and pretreatment (degreasing / blasting / phosphating, etc.)
Anti-corrosion coatings (primer + top coat or e-coating options)
Purpose: improve corrosion resistance in salt spray and moisture, preventing corrosion from attacking the bonding interface.
Early failures often come from debonding, not rubber bulk fracture. A consistent vulcanized bonding system improves:
Shear and peel strength
Bond retention after thermal aging
Interface stability under fatigue loading
This is a key technical barrier for a professional rubber metal engine mount supplier.
Increased vibration felt at the steering wheel, seat, or pedals at idle may indicate damping loss or rubber cracking.
If movement control weakens, torque reaction is amplified and transferred to the frame and cab, increasing harshness.
Visible posture change, knocking/impact noise, and possible hose pulling or bracket interference marks.
Surface cracking or powdering
Cracks or separation at the rubber-to-metal interface
Rubber becoming noticeably softer/harder (loss of elasticity)
Visual inspection: cracks, debonding, abnormal deformation
Observation: abnormal engine movement during idle or light throttle blips
Comparison: imbalance between left/right or front/rear mount conditions
Practical rule: if NVH worsens continuously plus stronger impacts appear, prioritize MAN engine mount replacement inspection
Park safely and disconnect power as required by service procedures
Use compliant jacks/engine support tools to safely support the engine
Avoid supporting load on weak areas such as thin oil pans
Mark the installation direction and position of the old part
Slightly unload engine weight to prevent bolt binding under shear
Remove fasteners and take out the old mount
Clean mounting surfaces; check brackets/seats for deformation or cracks
Install the new mount; hand-tighten for alignment before final tightening
Slowly release support load and recheck posture and interference
Idle check: movement, vibration, abnormal noise
Road test: start, acceleration, shifting, braking—cover key conditions
Recheck: after initial mileage, verify fastener tightness and mount seat condition
Fix oil/fuel leaks promptly to reduce long-term oil soak on rubber
Avoid sustained overload and harsh impacts
Add periodic mount inspection to fleet PM schedules (crack and posture checks)
Hebei Huami New Material Technology Co., Ltd. focuses on rubber products and rubber-metal bonded components, serving global commercial vehicle aftermarket and supply needs. We provide stable delivery for key powertrain parts such as MAN truck engine mount solutions.
30 years of rubber and rubber-metal manufacturing experience: deep understanding of heavy-duty, long-haul failure mechanisms and compound strategy
Multi-brand commercial vehicle coverage: MAN as well as Mercedes-Benz, Volvo, Scania and other mainstream systems
Quality & compliance: IATF16949, TÜV Rheinland, AEO Advanced Certification
In-house rubber compound R&D: high-damping, durable, heavy-duty reinforced engine mount solutions (NR / NBR / EPDM options)
Precision tooling and automated production: stable key dimensions and bonding consistency; high batch consistency
Full-process quality inspection: hardness / tensile / tear / compression set / bonding strength
Reliability validation capability: oil resistance, heat resistance, salt spray, high/low temperature, fatigue life testing
OEM/ODM + small-batch customization: neutral packing, low MOQ, stable lead time—ideal for distributors, workshops, and fleets
| Item | Details |
|---|---|
| OEM Number | 81962100571 |
| Replacement OEM Numbers | 81962100620 / 81962100562 / 81962100575 / 81962100577 |
| Materials | Rubber-metal bonded (NR / NBR / EPDM options) |
| Applicable Vehicles | MAN Trucks (fitment by actual installation) |
| Installation Position | Front / Rear / Side engine mount (varies by model) |
| Packaging & MOQ | Neutral packing; Low MOQ supported |
A: Fitment depends on the specific MAN model and mounting design. Confirm by OEM number + dimensions + mounting holes/bracket structure against your old part, or provide sample/drawing for verification.
A: They are commonly cross-referenced in the aftermarket, but final compatibility should be verified by structure, mounting points, and dimensions to avoid mismatch.
A: Increased idle vibration, stronger shock during start/acceleration/shifting, abnormal noise, engine sag or misalignment, and rubber cracking/debonding.
A: Possible causes include multiple mounts worn simultaneously, gearbox mount or torque rod bushing issues, powertrain alignment problems, or loose brackets/attachments—system inspection is recommended.
A: NR offers excellent dynamic performance, NBR improves oil resistance, and EPDM provides strong weather/ozone resistance. Selection depends on temperature, oil exposure, and duty cycle.
A: Not always. Too high hardness reduces isolation and raises stress, while too low hardness reduces load control. The best choice balances isolation, control, and durability.
A: Service life depends on duty cycle, load, temperature, oil exposure, and road conditions. Under heavy-duty long-haul use, periodic inspection is recommended; replace promptly when symptoms appear.
A: Yes. We support neutral packing and low MOQ to help distributors, workshops, and fleets optimize inventory and turnaround.
A: Yes. We can match structures and optimize compounds based on drawings/samples, including high-damping and heavy-duty reinforced solutions, with testing support.
A: Provide the OEM number(s), vehicle/model information (if available), multi-angle photos of the old part, key dimensions, or send a sample for verification.
