Walnut Blasting for Intake Ports and Valve Backs, with Recovery Running at the Same Time
The AUTOOL HTS678 blasts walnut-shell media into one intake port at a time while vacuum recovery pulls the spent media and loosened carbon back through dust and HEPA filters. Pressure is set with a regulator knob and gauge. An external air compressor is required and not included.
- 23 Intake Adapters
- Standard / Expert Modes
- Knob + Gauge Pressure Control
- HEPA Filtration
- 1500 W
Key Features
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Spray and Recovery Together
Walnut media is blasted and recovered by vacuum at the same time, reducing scattered media and manual cleanup.
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Adjustable Pressure
A regulating knob and pressure gauge let you watch and adjust blasting pressure for each intake cleaning task.
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Standard and Expert Modes
Choose the mode that suits your experience and the job; only one mode is used at a time.
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Dust Filter Plus HEPA
The filter cartridge and mesh screen separate walnut media from carbon residue; under normal conditions the media can be reused 5–10 times.
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Adapter Set for Many Port Shapes
The adapters cover multiple intake-port shapes but are not universal for every engine; match and seal the adapter to the target port.
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Workshop Mobility
A three-section telescoping handle, 360° swivel casters and a storage box keep the machine and its accessories together.
Model Comparison
| HTS518 | HTS678 | HTS728 | |
|---|---|---|---|
| Rated power | 1400 W | 1500 W | 1400 W |
| Main unit capacity | 30 L | 10 L | 10 L |
| Adapter types | 23 | 23 | 5 |
| Pressure gauge and regulation knob | No | Yes | Yes |
| HEPA filter | No | Yes | Yes |
| Modes | High/Low; Low-Speed | Standard; Expert | Recovery; Filling |
| Combustion-chamber cleaning | No | No | Yes |
| Walnut media size | 0.6–1.2 mm | 0.6–1.2 mm | 0.4–0.6 mm |
What’s in the Box
- HTS678 walnut blasting machine
- Intake adapter set (23 adapters)
- Walnut shell blasting gun
- Recovery hose and black bends
- Safety goggles
- Walnut media, depending on the selected package option
How to Use
- Prepare the machineInspect the unit and accessories, then connect the recovery hose and secure the clamp.
- Fit the adapterChoose the adapter that matches the intake-port shape and confirm it seals.
- Check the filter and load mediaMake sure the filter cartridge and lower screen are seated, then add 3–5 kg of dry walnut media.
- Prepare the portClose the target intake valve and isolate the other intake openings per the vehicle procedure.
- Connect air and powerConnect dry, filtered compressed air and AC power, then select one operating mode.
- Blast and recoverStart at a conservative setting, adjust pressure gradually on the gauge and keep recovery active.
- Clear and checkVacuum out remaining media, inspect for residue, reassemble, then run leak checks, a diagnostic scan and a functional check.
Installation, operation and maintenance: HTS678 user manual (PDF).
Good to Know
Caution
- An external air compressor is required and not included; it must also supply enough continuous airflow.
- Designed for intake pipes and the backs of intake valves only, not injectors, throttle valves, cylinders or combustion chambers.
- Blast only with the target intake valve fully closed, and remove all visible media before starting the engine; do not rely on it burning away.
- Walnut dust can trigger allergies. Wear eye and respiratory protection, ventilate the area and follow the media supplier’s SDS.
Care
- Use dry, filtered air; moisture can make the media clump or feed unevenly, so a dryer or water separator is recommended.
- Replace the media if it becomes contaminated or clumped, or cleaning performance drops.
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