AUTOOL HTS678 Walnut Sand Blaster Cleaner Car Engine Carbon Deposition Cleaning

(24 customer reviews)

Price range: US$49.00 through US$999.00

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AUTOOL HTS678

Product Overview

The AUTOOL HTS678 walnut sand blaster is a professional engine carbon deposition cleaning machine for intake pipes and the back side of intake valves. It uses walnut shell abrasive with an external compressed air source and a built-in 1500W recovery system to help remove hard carbon deposits from intake areas without using corrosive chemical cleaning fluid.

1500W Recovery System Adjustable Pressure Standard / Expert Mode 23 Adapters
10LCapacity
0.02MPaVacuum Suction
0.6-1.2mmWalnut Media
3 YearsWarranty
AUTOOL HTS678 walnut sand de-carbon cleaner main product image Click to enlarge
AUTOOL HTS678 walnut sand blaster three year warranty image Click to enlarge
Before You Order And Use

Before You Order And Use

Check the air compressor, walnut shell abrasive, package option, cleaning range, and safety requirements before using the HTS678 walnut blasting machine.

External Air Compressor Required

The HTS678 requires an external air compressor. The high-pressure air pump / air compressor is not included in the standard machine package.

0.7MPa / 6bar Or Higher

Use an air compressor that can provide up to 0.7MPa, with 6bar or more air pressure recommended for stable blasting performance.

Use A Dryer Filter

A compressor with a dryer filter is recommended to reduce moisture buildup, because moisture can cause walnut shell media to clump and weaken blasting performance.

Walnut Sand Package May Vary

Some package images show walnut media bags, while the original notes state walnut sand may not be included. Check the selected SKU or package option before ordering.

Intake Cleaning Only

HTS678 is mainly for engine intake pipe and intake valve back side cleaning. It is not intended for injector, throttle valve, cylinder, or combustion chamber cleaning.

Wear Eye Protection

Wear safety goggles during operation to protect your eyes from abrasive particles, dust, and accidental spray-back.

Before You Start

  • Use walnut shell abrasive sized 0.6-1.2mm for HTS678.
  • Recommended walnut sand filling amount is generally 3-5kg.
  • Walnut shell abrasive can normally be reused 5-10 times under suitable conditions.
  • Close the intake valve before blasting and clean one intake port at a time.
  • A 6-cylinder engine should be cleaned one cylinder intake port at a time, repeated six times as needed.
  • Only one operating mode switch should be active at a time; otherwise, air switch protection may engage.
  • High-precision intake systems can be sensitive to foreign matter, so confirm the correct adapter and cleaning method before operation.
  • Residual walnut powder in the intake pipe will usually burn to ash after the engine starts, but proper recovery and cleaning procedure should still be followed.
Key Features

Key Features

HTS678 combines adjustable pressure, dual operating modes, simultaneous blasting and recovery, filtration, a mobile trolley body, and a 23-piece adapter set for workshop intake carbon cleaning.

Dual Mode Operation

Switch between Standard Mode and Expert Mode according to user experience and the cleaning situation. Use only one mode at a time.

Adjustable Pressure Control

The pressure regulating knob and pressure gauge help users monitor and adjust blasting pressure for different intake cleaning tasks.

Deep Intake Carbon Cleaning

Walnut shell abrasive impacts carbon deposits inside the intake pipe and on the back side of the intake valve to help restore smoother intake airflow.

Built-In Dust Filter

The built-in dust filter helps separate recovered walnut sand grit from carbon deposits, making reuse easier and keeping the work area cleaner.

23 Adapter Set

The 23 adapters support many intake port shapes and vehicle platforms, including BMW, Volkswagen, Benz, Audi, GM, Toyota, Honda, Land Rover, and more.

Mobile Integrated Body

The three-section telescoping handle and 360-degree swivel caster design make the machine easier to move around the workshop.

How It Works

How It Works

HTS678 uses walnut shell abrasive as a natural polishing medium. Its hardness is lower than metal but higher than carbon deposits, helping remove carbon buildup from intake areas when used correctly.

Close The Intake Valve

Before blasting, close the target intake valve so the walnut media works on the selected intake port area instead of entering the combustion chamber.

Blast With Walnut Media

Compressed air drives walnut shell abrasive through the blasting gun so repeated impacts break down hard carbon buildup on the intake wall and valve back side.

Recover At The Same Time

The machine sprays and recovers walnut sand grit simultaneously through a closed-loop recovery path, reducing manual cleanup and media loss.

Filter And Reuse

The filter helps separate reusable walnut sand from removed carbon deposits, supporting cleaner operation and more efficient media use.

Applications

Applications

Use HTS678 for intake-side engine carbon cleaning where the correct adapter, closed intake valve position, and external compressed air setup can be confirmed.

Intake Pipe Cleaning

Clean carbon deposits from engine intake pipes by blasting and recovering walnut shell abrasive through the connected hose and adapter.

Intake Valve Back Side

Target the back side of intake valves, especially where hard black carbon shells form after incomplete fuel combustion and heat exposure.

Workshop Decarbon Service

Suitable for workshops that need repeatable intake carbon cleaning with a mobile unit, pressure gauge, adapter set, and recovery system.

Adapter-Based Vehicle Coverage

Use the supplied adapters to match different intake port shapes. Confirm fitment before service on high-precision intake systems.

Specifications

AUTOOL HTS678 Product Specifications

HTS678 is a 1500W walnut shell blasting cleaner with a 10L capacity, 0.02MPa vacuum suction, adjustable pressure control, HEPA filter, and 23 configured connectors.

Core Specifications
ProductAUTOOL HTS678 Walnut Sand Blaster Cleaner
Working PrincipleWalnut shell blasting
Application AreaEngine intake pipe and intake valve back side carbon cleaning
Rated Voltage110V / 220V
Rated Frequency50 / 60Hz
Rated Power1500W
Main Unit Capacity10L
Vacuum Suction0.02MPa
Airflow<300L/min
Package Dimensions610 × 630 × 820mm
Packing Weight52kg
Media And Operation
Walnut Shell Abrasive Size0.6-1.2mm
Suggested Fill AmountGenerally 3-5kg
External Air CompressorRequired; not included
Recommended Compressor Pressure0.7MPa / 6bar or higher
Pressure GaugeYes
Pressure SettingsPressure regulating knob
Mode SwitchStandard Mode / Expert Mode
Configuration
Configured Connectors23 types
Storage BoxYes
Built-In Dust FilterYes
HEPA FilterYes
360° Swivel CasterYes
Three-Section Telescoping HandleYes
Engine Combustion Chamber CleaningNo; choose HTS728 if combustion chamber cleaning is required
AUTOOL HTS678 specifications and product structure diagram Click to enlarge
Core Specifications
ProductAUTOOL HTS678 Walnut Sand Blaster Cleaner
Working PrincipleWalnut shell blasting
Application AreaEngine intake pipe and intake valve back side carbon cleaning
Rated Voltage110V / 220V
Rated Frequency50 / 60Hz
Rated Power1500W
Main Unit Capacity10L
Vacuum Suction0.02MPa
Airflow<300L/min
Package Dimensions610 × 630 × 820mm
Packing Weight52kg
Media And Operation
Walnut Shell Abrasive Size0.6-1.2mm
Suggested Fill AmountGenerally 3-5kg
External Air CompressorRequired; not included
Recommended Compressor Pressure0.7MPa / 6bar or higher
Pressure GaugeYes
Pressure SettingsPressure regulating knob
Mode SwitchStandard Mode / Expert Mode
Configuration
Configured Connectors23 types
Storage BoxYes
Built-In Dust FilterYes
HEPA FilterYes
360° Swivel CasterYes
Three-Section Telescoping HandleYes
Engine Combustion Chamber CleaningNo; choose HTS728 if combustion chamber cleaning is required
How To Use

How To Use

Set up the recovery hose, select the correct intake adapter, add walnut shell abrasive, connect an external compressed air source, and clean one intake port at a time.

Inspect And Prepare

Open the package, inspect all parts for damage, raise the rod, unlock the metal latches, swing out the accessory box, and remove the required accessories.

Connect Recovery Hose

Connect the recovery particle hose with the tendon sheath to the main unit, clamp it securely, and confirm it is locked in place.

Choose The Adapter

Select the suitable metal connector or yellow silicone connector for the engine air intake. Use the large bend with the metal adapter and the small bend with the yellow silicone adapter.

Check The Filter

Open the top cover, rotate the filter cartridge handle counterclockwise, remove the cartridge, and confirm that the bottom filter screen is flat and not rolled over.

Add Walnut Sand

Add walnut shell abrasive through the filler opening. The recommended amount is generally 3-5kg, using 0.6-1.2mm walnut shell abrasive for HTS678.

Connect Air And Start

Reinstall the filter cartridge, close the top cover, move the machine to the work area, connect the external air compressor, and start Standard Mode or Expert Mode.

Blast And Adjust

Insert the sandblasting gun into the injection port on the black silicone bend, pull the gun switch, and adjust the throttle valve according to the workpiece and cleaning condition.

Operation Notes

  • Wear safety goggles before starting the cleaning procedure.
  • Use a compressor with dry, stable air; moisture can cause walnut media to clump.
  • Keep only one mode switch active at a time, or air switch protection may engage.
  • Adjust the throttle valve gradually based on the intake port condition and blasting effect.
  • Clean one intake port at a time. Repeat the process for each cylinder as needed.
  • For injector, throttle valve, cylinder, or combustion chamber cleaning, choose the correct dedicated cleaning equipment instead of using HTS678 outside its intended range.
AUTOOL HTS678 packing list with main unit adapters goggles blasting gun hoses bends and walnut media bags Click to enlarge
What Is In The Box

What Is In The Box

The packing list image shows the HTS678 main unit and accessories. Final contents can vary by selected package option, especially walnut sand media, so confirm the selected SKU before ordering. The external air compressor is not included.

Main UnitAUTOOL HTS678 walnut sand blaster cleaner
Adapter Set23 adapters shown in the package image
Blasting GunSandblasting gun shown in the package image
Hoses And BendsRecovery hose and black bends shown in the package image
Safety GogglesProtective goggles shown in the package image
Walnut MediaWalnut media bags are shown in the image; inclusion may vary by package option
Not IncludedExternal air compressor / high-pressure air pump
Product Comparison

Product Comparison

Compare HTS678 with HTS558, HTS559, HTS518, and HTS728 before choosing the correct power level, capacity, connector set, operating mode, filter configuration, and cleaning range.

HTS678 Focus1500W, 10L capacity, 0.02MPa vacuum suction, <300L/min airflow, 23 connectors, pressure gauge, pressure regulating knob, Standard / Expert Mode, HEPA filter, storage box, telescoping handle, and 360° caster.
HTS558 / HTS559Basic walnut blasting choices. HTS558 is 1200W with 13L capacity and 5 connector types. HTS559 is 1400W with 30L capacity and 5 connector types.
HTS5181400W, 30L capacity, 23 connector types, storage box, built-in dust filter, High/Low Mode, and Low-Speed Mode for users who need mode selection but not HTS678 pressure gauge configuration.
HTS728Higher-end option with >0.7MPa vacuum suction, >400L/min airflow, 0.4-0.6mm walnut shell abrasive, pressure regulation, Recovery Mode / Filling Mode, HEPA filter, and engine combustion chamber cleaning support.
Decision CheckChoose HTS678 for professional intake valve and intake pipe carbon cleaning with 23 adapters and pressure monitoring. Choose HTS728 if combustion chamber cleaning is required.
AUTOOL HTS558 HTS559 HTS518 HTS678 HTS728 engine carbon cleaning machine comparison chart Click to enlarge
Related Products

Related Products

Compare related AUTOOL walnut blasting machines and walnut shell abrasive before choosing the right capacity, connector set, cleaning mode, pressure control, and media package.

Manual And Downloads

Manual And Downloads

Download the HTS678 user manual for setup, connector selection, filter inspection, walnut sand filling, operating mode, air compressor connection, and safety instructions.

AUTOOL HTS678 walnut sand de-carbon cleaner user manual preview Click to enlarge

AUTOOL HTS678 User Manual

Open the PDF manual for HTS678 installation, operation, maintenance, and safety guidance.

Download Manual

Need Setup Confirmation?

Contact AUTOOL Store before ordering if you need to confirm air compressor configuration, walnut sand package options, 23-adapter fitment, combustion chamber cleaning requirements, or HTS678 / HTS728 selection.

Questions And Answers

These answers cover walnut sand, carbon deposition, compressor requirements, cleaning range, package contents, HTS678 / HTS728 differences, operation notes, and warranty support.

Related Guides

Related Guides

Use these related articles to understand walnut blasting, engine carbon removal, and how walnut blasting compares with dry ice blasting.

AUTOOL dry ice blasting cleaner series guide image
Guide / 07-18-2025

Why Is Dry Ice Blasting So Expensive?

More and more car enthusiasts and professionals are choosing dry ice blasting technology as an efficient and eco-friendly vehicle maintenance method. However, many are.

Warranty And Contact

Warranty And Contact

For HTS678 setup, walnut shell abrasive, compressor requirements, adapter fitment, HTS728 comparison, package content confirmation, or warranty support, contact AUTOOL Store directly.

Pre-Sales And Product Support

Use support if you need help confirming whether HTS678 is suitable for your intake carbon cleaning service, whether HTS728 is required for combustion chamber cleaning, or which walnut shell abrasive and air compressor configuration to prepare.

  • HTS678 / HTS728 model selection support
  • Air compressor pressure and dryer filter confirmation
  • Walnut shell abrasive size and package option confirmation
  • 23-adapter compatibility and intake port fitment help
  • Package contents and accessory confirmation
  • Operation, troubleshooting, and replacement accessory support
  • 3-year warranty support for eligible non-human damage cases
  • Lifetime maintenance support

Customer Reviews

  1. 5
    (24 customer reviews)
    100% of customers recommend this product.
    5 Stars100%4 Stars0%3 Stars0%2 Stars0%1 Star0%
  2. Aveline

    I have the AUTOOL complete set and I trust their quality.

    0 of 0 found this review helpful
  3. Michael Schmocker

    Nice Machine, works realy well.
    Fast delivery

    0 of 0 found this review helpful
  4. Excellent .

    Works great. Just as it should. Makes cleaning my Audis valves a breeze instead of manually chipping away the carbon buildup

    0 of 0 found this review helpful
  5. John

    Absolutely professional. friendly and very fast shipping. Product is highly recommended???????????

    0 of 0 found this review helpful
  6. Ivan Radkov

    I am satisfied with the communication and the correctness. The machine arrived right on schedule and works perfectly.

    0 of 0 found this review helpful
  7. John92250

    I was pleasantly surprised that the cleaning effect was very good and there was no damage to the engine.

    0 of 0 found this review helpful
  8. Benjamin

    My friend tried this machine together and we were both pleasantly surprised that this machine has such an efficient cleaning effect.
    The results before and after the cylinder cleaning are very obvious.
    This is a recommended machine!!!

    0 of 0 found this review helpful
  9. Greg Raleign

    This new HTS678 cleans to a very high level! The cleaning volume is so high that I can clean multiple cars at a time and am very happy with it!

    0 of 0 found this review helpful
  10. SEDMNSR

    Cleaned exceptionally well!

    0 of 0 found this review helpful
  11. Mike

    I’ve been a long time customer of this brand and their equipment always surprises me!

    0 of 0 found this review helpful
  12. Jeff

    Great product, cleans very well!

    0 of 0 found this review helpful
  13. Pitty

    My husband loves this product and says it always cleans up in no time!

    0 of 0 found this review helpful
  14. Clarence Beerbohm

    I am very pleased with the results of the HTS678, it cleans very well and the HTS678 cleans very quickly, our workshop cleans a large number of cars per day, which is a huge improvement in cleaning efficiency for us! I love this product very much!

    0 of 0 found this review helpful
  15. Vass

    You guys have to try it once, the results are amazing!

    0 of 0 found this review helpful
  16. SEDMNSR

    Exceptionally great product!
    See I am using it to clean me both engines!

    0 of 0 found this review helpful
  17. SEDMNSR

    Good product!!!

    0 of 0 found this review helpful
  18. H¨¦lder Pinheiro

    I used this walnut blasting machine to clean the intake valves on my car, and the results were amazing. It¡¯s easy to use, powerful, and makes the engine run smoother. Highly recommended for mechanics alike!

    0 of 0 found this review helpful
  19. ga?per zupan?i?

    Yellow increases brightness, easy to use, good carbon cleaning effect! In about 2 minutes, you can see this cleaning effect!

    0 of 0 found this review helpful
  20. Nigel Browne

    A very professional device with a very nice design, good quality, efficient cleaning and I like the AUTOOL design style.

    0 of 0 found this review helpful
  21. David Carroll

    After using the AUTOOL HTS678, I’ve been very satisfied. It uses harmless walnut shells as a cleaning medium, which cleans carbon deposits from the intake manifold and valves very thoroughly without scratching metal surfaces.

    The 1800W motor is powerful and provides stable suction. The adjustable air pressure knob allows for flexible adjustments based on the vehicle model and the level of carbon deposits, resulting in effective cleaning results. Since using this device, customers have reported a smoother engine idle and improved fuel consumption.

    Furthermore, the 23 included interfaces are very practical, covering nearly every type of vehicle we encounter daily. There’s no need to purchase additional adapters, saving significant time and money.

    0 of 0 found this review helpful
  22. Cash Woolley

    Excellent item, managed to clean carbon off my rs4 – see pics before, during and after – great value. Highly recommended

    0 of 0 found this review helpful
  23. Rudolf Hubbard

    The product design is sleek, the materials are top-notch, and the filter quality is excellent. I know this filter can be cleaned and reused, which is fantastic. Another major plus is its outstanding cleaning performance! I’ve attached a comparison photo of an engine we cleaned at our repair shop. I highly recommend this product¡ªevery workshop should have one of these machines!

    0 of 0 found this review helpful
  24. Wisnik Michal

    Adjustable output air pressure. Deeply cleans carbon deposits in the intake manifold and valves. Equipped with an 1800W motor and an adjustable pressure knob, it has strong suction and flexible air pressure adjustment. In addition, it is equipped with 23 interfaces suitable for various models.

    0 of 0 found this review helpful
  25. Ida Tours

    thank you very much for the excellent service, product received as expected

    0 of 0 found this review helpful
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AUTOOL HTS678 Walnut Sand Blaster Cleaner Car Engine Carbon Deposition Cleaning
AUTOOL HTS678 Walnut Sand Blaster Cleaner Car Engine Carbon Deposition Cleaning

Price range: US$49.00 through US$999.00

Add to cart This product has multiple variants. The options may be chosen on the product page