The Engine insulation pad system is a comprehensive set of thermal and acoustic barriers designed to reduce engine noise, heat, and vibration inside the HOWO MAX 4X2 cab. This genuine HOWO kit includes cab insulation pads, damping plywood plates, a damping plate, and snap rings – all engineered to create a quieter, more comfortable driving environment. When you choose authentic Howo Parts, this Engine insulation pad set guarantees OE fitment and superior noise reduction. Below are detailed descriptions of every component included with this Engine insulation pad assembly.
This cab thermal insulation and acoustic absorption pad is the primary sound‑deadening material that covers the engine tunnel and firewall areas. The Engine insulation pad is made from high‑density polyurethane foam with an aluminized heat‑reflective layer, effectively blocking engine heat and absorbing airborne noise.
This pad is precision‑cut to fit the HOWO MAX 4X2 cab contour, ensuring complete coverage and maximum insulation performance. The material is lightweight yet durable, resistant to oil and moisture,
and helps maintain a stable cabin temperature, reducing the load on the air conditioning system. The acoustic absorption layer reduces engine noise by up to 8 dB, significantly improving driver comfort during long hauls. This Engine insulation pad is secured using the supplied snap rings and can be easily installed or removed for maintenance access.
The left rear damping plywood is a structural panel that reinforces the rear left section of the cab floor, providing additional stiffness and vibration damping. This Engine insulation pad component is made from high‑density fiberboard with a laminated damping layer, reducing resonance and panel flex that can transmit road noise into the cabin.
It is contoured to fit the specific shape of the left rear floor area and is covered with an acoustic foam layer for enhanced sound absorption. The plywood is secured using the snap rings, ensuring a rattle‑free fit. This component works in conjunction with the insulation pads to create a complete barrier against noise and heat intrusion.
The damping plate is a universal vibration‑damping sheet that can be applied to various flat metal surfaces inside the cab. This Engine insulation pad component is made from a butyl‑rubber compound with an aluminium foil facing, which converts vibrational energy into heat through viscoelastic damping. It is self‑adhesive, allowing easy application to floor panels, door inner skins, and roof sections. The damping plate effectively reduces panel resonance and structure‑borne noise,
complementing the thermal and acoustic pads. It is ideal for treating problem areas where road or engine noise is most pronounced. The material is resistant to temperature extremes and will not degrade over time, providing lasting performance. This Engine insulation pad component is supplied as a single sheet, ready to be cut and shaped to fit specific areas as needed.
Thirty‑one snap rings are supplied to secure the various Engine insulation pad components to the cab structure. These snap rings are made from spring steel with a corrosion‑resistant phosphate coating, providing a reliable, quick‑release fastening system. The snap rings are designed to fit into pre‑drilled holes in the cab panels,
holding the insulation pads and damping plywood firmly in place without the need for tools. Their retaining clips ensure a tight, rattle‑free fit, preventing movement or sagging over time.
The snap rings are reusable and allow for easy removal of the Engine insulation pad system for servicing or replacement. The quantity supplied is sufficient for the complete installation of all pads and plywood panels included in this kit. Using genuine snap rings ensures consistent holding force and prevents damage to the insulation materials.
The left front damping plywood is a shaped panel that covers the front left floor area and footwell, providing structural reinforcement and vibration damping. This Engine insulation pad component is manufactured from the same high‑density fiberboard with a laminated damping layer, featuring cutouts to accommodate pedal linkages and wiring harnesses.
It is covered with an acoustic foam layer to absorb noise and reduce heat transfer from the engine compartment. The panel is precision‑formed to match the floor contour, ensuring seamless integration with the cab interior.
Installation is straightforward using the snap rings, and the panel provides a solid foundation for the floor mats and trim. This Engine insulation pad component is essential for reducing road noise and improving thermal comfort in the driver’s footwell area.
The right front damping plywood is the counterpart for the passenger side, offering the same structural and acoustic benefits. This Engine insulation pad component mirrors the left front panel, providing symmetrical damping and insulation for the front footwell area.
It is made from the same high‑quality materials and is also covered with acoustic foam. The panel includes cutouts for wiring and HVAC ducting, ensuring a precise fit.
By installing both front damping plywood panels, the cab floor is uniformly treated, minimising resonance and maximising noise reduction. This Engine insulation pad component is critical for achieving a quiet, comfortable cabin environment for both driver and passenger.
This thermal insulation and acoustic absorption pad is a secondary insulating layer used in strategic areas such as the transmission tunnel and rear bulkhead. The Engine insulation pad is composed of a multi‑layer composite of felt and closed‑cell foam, providing excellent thermal resistance and sound absorption.
It is lighter than the main cab pad but offers comparable acoustic performance, making it ideal for areas where space is limited. The pad is pre‑cut to specific shapes and is secured using the snap rings.
Its flexible nature allows it to conform to irregular surfaces, ensuring a tight seal against heat and noise intrusion. This Engine insulation pad component complements the larger pads and plywood panels,
creating a comprehensive insulation system that covers every potential entry point for engine noise and heat. By using this additional insulation layer, drivers will experience a noticeable reduction in interior sound levels and improved climate control efficiency.
Engine insulation pad – genuine HOWO complete thermal and acoustic insulation kit for MAX 4X2
This Engine insulation pad kit includes every pad, plywood panel, damping sheet, and fastener needed to fully insulate the cab. With this Engine insulation pad system, you can effectively reduce engine noise and heat ingress, creating a quieter, more comfortable cabin environment.
All Engine insulation pad components are manufactured from premium materials, including high‑density polyurethane foam, aluminized heat‑reflective layers, and durable fiberboard. These materials are designed to withstand the demanding conditions of heavy truck operation, providing lasting performance.
Every Engine insulation pad and damping plywood is precision‑cut to match the exact contours of the HOWO MAX 4X2 cab. This ensures complete coverage and eliminates gaps that could compromise insulation performance. The snap rings provide a secure, rattle‑free attachment.
This Engine insulation pad kit includes all necessary snap rings for fast and tool‑free installation. The self‑adhesive damping plate simplifies application to metal panels. No additional hardware is required, making the Engine insulation pad system a practical upgrade for any workshop.
The Engine insulation pad system works by creating a multi‑layer barrier between the engine compartment and the cabin interior. The primary cab thermal and acoustic absorption pad covers the firewall and transmission tunnel, blocking engine heat and absorbing airborne noise.
The damping plywood panels add structural rigidity to the floor, reducing panel resonance and vibration. The damping plate, applied to flat metal surfaces, further reduces structure‑borne noise. The secondary thermal and acoustic absorption pads fill gaps and add extra insulation in critical areas.
The snap rings securely hold all components in place, preventing any movement that could create rattles or allow gaps to form. Together, these Engine insulation pad components reduce interior noise levels by up to 10 dB, lower cabin temperatures, and improve the efficiency of the heating and air conditioning systems. This results in a more comfortable and less fatiguing driving experience, especially on long‑haul routes.
Before installation, remove the cab floor mats and any existing insulation. Clean the metal surfaces thoroughly to ensure proper adhesion of the damping plate. Start by applying the damping plate to areas where panel resonance is most noticeable, such as the roof and door skins. Next, position the main cab thermal and acoustic absorption pad over the firewall and transmission tunnel,
aligning it with the existing mounting holes. Secure it using the snap rings, pressing them firmly into place. Install the left and right front and rear damping plywood panels onto the floor,
ensuring they are correctly oriented and seated flush. Finally, place the secondary thermal and acoustic absorption pads in any remaining areas. Reinstall the floor mats and trim panels. The Engine insulation pad installation is now complete. Check that all snap rings are securely fastened and that there are no loose edges.
If the Engine insulation pad produces a rattling noise, check that all snap rings are properly seated. A loose pad can vibrate against the metal; re‑secure it with additional snap rings if needed. If the adhesive on the damping plate fails to bond, clean the surface with a degreaser before application.
If the cab feels excessively warm, ensure that the main thermal pad is covering the entire firewall and that there are no gaps. If the noise level remains high, inspect for missing or misaligned pads; add the secondary pads to any overlooked areas. Always use genuine Engine insulation pad components for best results.
The Engine insulation pad system requires very little maintenance. Periodically inspect the pads for signs of wear, moisture absorption, or damage from spilled fluids. Replace any pad that has become waterlogged or torn.
Check the snap rings for corrosion and replace if necessary. Keep the Engine insulation pad clean by vacuuming any dust or debris that may accumulate. The damping plate does not require maintenance. A well‑maintained Engine insulation pad system will continue to provide effective thermal and acoustic insulation for the life of the vehicle.
This Engine insulation pad kit is specifically designed for the HOWO MAX 4X2 tractor and is compatible with all production years from 2018 onward. The pads and plywood panels are shaped to fit the standard cab configuration.
The kit is also suitable for SITRAK C7H and HOWO T7H models that share the same cab floor and firewall dimensions. It is not compatible with older A7 or WD615 models, which have different cab structures. Always verify your cab type before ordering.
Aftermarket Engine insulation pad kits often use inferior foam that degrades quickly or absorbs moisture, losing its insulating properties. Generic damping plates may not have the correct adhesive strength, leading to detachment over time.
Non‑genuine snap rings may not hold the pads securely, causing rattles and gaps. A poor insulation system can result in elevated cabin temperatures, increased noise levels, and higher air conditioning loads, reducing fuel efficiency and driver comfort. Genuine HOWO Engine insulation pad components are manufactured to SINOTRUK’s exacting standards
, using certified materials and precise dimensions. The small additional cost of a genuine Engine insulation pad kit is far outweighed by the improved comfort and productivity of the driver. For fleet operators, investing in genuine insulation reduces driver fatigue and contributes to safer, more efficient operations.
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