AUTOOL HTS678 Walnut Sand Blaster Cleaner Car Engine Carbon Deposition Cleaning

AUTOOL HTS678Product OverviewThe 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 Adapters10LCapacity0.02MPaVacuum Suction0.6-1.2mmWalnut Media3 YearsWarranty Click to enlarge Click to enlargeBefore You Order And UseBefore You Order And UseCheck the air compressor, walnut shell abrasive, package option, cleaning range, and safety requirements before using the HTS678 walnut blasting machine.External Air Compressor RequiredThe 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 HigherUse an air compressor that can provide up to 0.7MPa, with 6bar or more air pressure recommended for stable blasting performance.Use A Dryer FilterA 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 VarySome 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 OnlyHTS678 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 ProtectionWear safety goggles during operation to protect your eyes from abrasive particles, dust, and accidental spray-back.Before You StartUse 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 FeaturesKey FeaturesHTS678 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 OperationSwitch between Standard Mode and Expert Mode according to user experience and the cleaning situation. Use only one mode at a time.Adjustable Pressure ControlThe pressure regulating knob and pressure gauge help users monitor and adjust blasting pressure for different intake cleaning tasks.Deep Intake Carbon CleaningWalnut 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 FilterThe built-in dust filter helps separate recovered walnut sand grit from carbon deposits, making reuse easier and keeping the work area cleaner.23 Adapter SetThe 23 adapters support many intake port shapes and vehicle platforms, including BMW, Volkswagen, Benz, Audi, GM, Toyota, Honda, Land Rover, and more.Mobile Integrated BodyThe three-section telescoping handle and 360-degree swivel caster design make the machine easier to move around the workshop. Click to enlarge Click to enlarge Click to enlarge Click to enlarge Click to enlarge Click to enlargeHow It WorksHow It WorksHTS678 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 ValveBefore 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 MediaCompressed 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 TimeThe machine sprays and recovers walnut sand grit simultaneously through a closed-loop recovery path, reducing manual cleanup and media loss.Filter And ReuseThe filter helps separate reusable walnut sand from removed carbon deposits, supporting cleaner operation and more efficient media use.ApplicationsApplicationsUse 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 CleaningClean carbon deposits from engine intake pipes by blasting and recovering walnut shell abrasive through the connected hose and adapter.Intake Valve Back SideTarget the back side of intake valves, especially where hard black carbon shells form after incomplete fuel combustion and heat exposure.Workshop Decarbon ServiceSuitable for workshops that need repeatable intake carbon cleaning with a mobile unit, pressure gauge, adapter set, and recovery system.Adapter-Based Vehicle CoverageUse the supplied adapters to match different intake port shapes. Confirm fitment before service on high-precision intake systems.SpecificationsAUTOOL HTS678 Product SpecificationsHTS678 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 SpecificationsProductAUTOOL HTS678 Walnut Sand Blaster CleanerWorking PrincipleWalnut shell blastingApplication AreaEngine intake pipe and intake valve back side carbon cleaningRated Voltage110V / 220VRated Frequency50 / 60HzRated Power1500WMain Unit Capacity10LVacuum Suction0.02MPaAirflow<300L/minPackage Dimensions610 × 630 × 820mmPacking Weight52kgMedia And OperationWalnut Shell Abrasive Size0.6-1.2mmSuggested Fill AmountGenerally 3-5kgExternal Air CompressorRequired; not includedRecommended Compressor Pressure0.7MPa / 6bar or higherPressure GaugeYesPressure SettingsPressure regulating knobMode SwitchStandard Mode / Expert ModeConfigurationConfigured Connectors23 typesStorage BoxYesBuilt-In Dust FilterYesHEPA FilterYes360° Swivel CasterYesThree-Section Telescoping HandleYesEngine Combustion Chamber CleaningNo; choose HTS728 if combustion chamber cleaning is required Click to enlarge Core SpecificationsProductAUTOOL HTS678 Walnut Sand Blaster CleanerWorking PrincipleWalnut shell blastingApplication AreaEngine intake pipe and intake valve back side carbon cleaningRated Voltage110V / 220VRated Frequency50 / 60HzRated Power1500WMain Unit Capacity10LVacuum Suction0.02MPaAirflow<300L/minPackage Dimensions610 × 630 × 820mmPacking Weight52kg Media And OperationWalnut Shell Abrasive Size0.6-1.2mmSuggested Fill AmountGenerally 3-5kgExternal Air CompressorRequired; not includedRecommended Compressor Pressure0.7MPa / 6bar or higherPressure GaugeYesPressure SettingsPressure regulating knobMode SwitchStandard Mode / Expert Mode ConfigurationConfigured Connectors23 typesStorage BoxYesBuilt-In Dust FilterYesHEPA FilterYes360° Swivel CasterYesThree-Section Telescoping HandleYesEngine Combustion Chamber CleaningNo; choose HTS728 if combustion chamber cleaning is required How To UseHow To UseSet 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 PrepareOpen 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 HoseConnect the recovery particle hose with the tendon sheath to the main unit, clamp it securely, and confirm it is locked in place.Choose The AdapterSelect 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 FilterOpen 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 SandAdd 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 StartReinstall 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 AdjustInsert 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 NotesWear 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. Click to enlargeWhat Is In The BoxWhat Is In The BoxThe 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 cleanerAdapter Set23 adapters shown in the package imageBlasting GunSandblasting gun shown in the package imageHoses And BendsRecovery hose and black bends shown in the package imageSafety GogglesProtective goggles shown in the package imageWalnut MediaWalnut media bags are shown in the image; inclusion may vary by package optionNot IncludedExternal air compressor / high-pressure air pumpProduct ComparisonProduct ComparisonCompare 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. Click to enlargeRelated ProductsRelated ProductsCompare related AUTOOL walnut blasting machines and walnut shell abrasive before choosing the right capacity, connector set, cleaning mode, pressure control, and media package. SALESelect options This product has multiple variants. The options may be chosen on the product page Add to wishlist Add to compare Quick view iconQuick view Walnut Sand De-Carbon CleanerAUTOOL HTS558 Walnut Blaster Engine CleanerRated 0 out of 5(0) From US$359.00 Select options This product has multiple variants. The options may be chosen on the product page Select options This product has multiple variants. The options may be chosen on the product page Add to wishlist Add to compare Quick view iconQuick view Walnut Sand De-Carbon CleanerAUTOOL HTS559 Walnut Blasting Machine SandblasterRated 0 out of 5(0) From US$549.00 Select options This product has multiple variants. The options may be chosen on the product page Select options This product has multiple variants. The options may be chosen on the product page Add to wishlist Add to compare Quick view iconQuick view Walnut Sand De-Carbon CleanerAUTOOL HTS518 Car Engine Carbon Deposition Cleaner Intake Pipe Valve Cleaning Machine Decarbonizing Auto Decarbon WashRated 0 out of 5(0) From US$539.00 Select options This product has multiple variants. The options may be chosen on the product page SALESelect options This product has multiple variants. The options may be chosen on the product page Add to wishlist Add to compare Quick view iconQuick view Carbon Deposit Cleaning EquipmentAUTOOL HTS678 Walnut Sand Blaster Cleaner Car Engine Carbon Deposition CleaningRated 0 out of 5(0) From US$999.00 Select options This product has multiple variants. The options may be chosen on the product page Select options This product has multiple variants. The options may be chosen on the product page Add to wishlist Add to compare Quick view iconQuick view Walnut Sand De-Carbon CleanerAUTOOL HTS728 Walnut Blasting Machine Expert-Grade Carbon Cleaning MachineRated 0 out of 5(0) From US$2,399.00 Select options This product has multiple variants. The options may be chosen on the product page Select options This product has multiple variants. The options may be chosen on the product page Add to wishlist Add to compare Quick view iconQuick view Walnut Blasting Machine Accessories1KG Walnut Sand For AUTOOL HTS558,HTS518,HTS559 and HTS678Rated 0 out of 5(0) From US$16.00 Select options This product has multiple variants. The options may be chosen on the product page Manual And DownloadsManual And DownloadsDownload the HTS678 user manual for setup, connector selection, filter inspection, walnut sand filling, operating mode, air compressor connection, and safety instructions. Click to enlargeAUTOOL HTS678 User ManualOpen the PDF manual for HTS678 installation, operation, maintenance, and safety guidance. Download ManualNeed 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.Email[email protected] WhatsApp 86 189 2647 7404Questions And AnswersThese answers cover walnut sand, carbon deposition, compressor requirements, cleaning range, package contents, HTS678 / HTS728 differences, operation notes, and warranty support. What Is Walnut Sand? Walnut sand is made from processed walnut shells after crushing, screening, and classification. It is used as a natural polishing and blasting medium with high hardness, pressure resistance, wear resistance, and a microporous surface that helps adsorb dirt and carbon particles.When used correctly, walnut shell abrasive can help remove carbon deposits without corroding metal surfaces like some chemical cleaners. For HTS678, use 0.6-1.2mm walnut shell abrasive. What Is Carbon Deposition? Carbon deposition is the hard black residue that forms when hydrocarbon and olefin residues from incomplete fuel combustion attach to engine intake and valve areas, then harden under high-temperature conditions. Why Should Engine Carbon Deposits Be Cleaned? Carbon deposits can affect the air-fuel ratio, reduce engine output, increase fuel consumption, cause unstable idle, weaken acceleration, and increase engine vibration. As a general maintenance reference, intake carbon cleaning is often considered after about 40,000-50,000km, depending on vehicle condition and usage. What Air Compressor Does HTS678 Need? HTS678 requires an external air compressor. Use an air compressor with air pressure up to 0.7MPa and 6bar or more air pressure recommended. A dryer filter is also recommended to prevent moisture from clumping the walnut shell abrasive. Is The Air Compressor Included? No. The external air compressor / high-pressure air pump is not included. It needs to be prepared separately before operating the HTS678 walnut blasting machine. Is Walnut Sand Included In The Package? Package information may vary by selected SKU or option. Some package images show walnut media bags, while the original notes also state walnut sand may not be included. Check the selected package option before ordering, or contact support for confirmation. How Much Walnut Shell Abrasive Should I Add? Add walnut shell abrasive through the filler opening. The recommended amount is generally 3-5kg. Use 0.6-1.2mm walnut shell abrasive for HTS678, and keep the media dry for better blasting performance. What Does HTS678 Clean? HTS678 is designed for engine intake pipe and intake valve back side cleaning. It cleans one intake pipe / intake port at a time. For a 6-cylinder engine, clean each port one by one and repeat the procedure six times as needed. Can HTS678 Clean Injectors, Throttle Valves, Cylinders, Or Combustion Chambers? No. HTS678 is mainly for intake pipe and intake valve back side cleaning. If you need injector, throttle valve, cylinder, or combustion chamber cleaning, choose the correct dedicated cleaning equipment. For combustion chamber cleaning in the AUTOOL walnut blasting range, compare HTS728 before ordering. What Is The Difference Between HTS678 And HTS728? HTS678 is a professional intake carbon cleaning machine with 1500W rated power, 10L capacity, 23 connectors, pressure gauge, pressure regulation knob, Standard / Expert Mode, HEPA filter, storage box, and telescoping handle.HTS728 is the higher-end option. It uses finer 0.4-0.6mm walnut shell abrasive, offers stronger suction and airflow, uses Recovery Mode / Filling Mode, and supports engine combustion chamber cleaning. Choose HTS728 if combustion chamber cleaning is required. How Do HTS558, HTS559, HTS518, HTS678, And HTS728 Differ? HTS558 is the basic 1200W model with 13L capacity and 5 connector types. HTS559 upgrades to 1400W and 30L capacity. HTS518 adds 23 connector types and High/Low Mode plus Low-Speed Mode. HTS678 adds 1500W rated power, pressure gauge, pressure regulating knob, Standard / Expert Mode, HEPA filter, storage box, and 23 connectors. HTS728 is the higher-end model for finer walnut media and combustion chamber cleaning support. What Should I Check Before Operation? Inspect all parts for damage, confirm the recovery hose is locked, choose the correct adapter, check that the filter screen is flat and not rolled over, add the correct walnut shell abrasive, close the target intake valve, connect a dry external compressed air source, and wear safety goggles. Will Walnut Powder Residue Damage The Engine? Under the intended cleaning procedure, the HTS678 sprays and recovers walnut shell abrasive simultaneously. Any small residual walnut powder in the intake pipe will usually burn to ash at high temperature after the engine starts. However, proper valve closing, adapter selection, blasting, and recovery steps should always be followed. How Long Is The Warranty? AUTOOL provides 3-year warranty support for eligible non-human damage cases and lifetime maintenance support. If you need accessories, troubleshooting, package confirmation, or model selection help, contact AUTOOL Store support.Related GuidesRelated GuidesUse these related articles to understand walnut blasting, engine carbon removal, and how walnut blasting compares with dry ice blasting. Guide / 01-17-2025How Walnut Shells Effectively Remove Engine Carbon BuildupIs Engine Carbon Buildup Difficult to Clean? Traditional cleaning methods often fail to completely remove carbon deposits, but walnut shell cleaning technology offers. Guide / 09-29-2024Cleaning Engine Carbon – Dry Ice Blasting and Walnut BlastingCleaning engine carbon deposits: Is it necessary? The engine, as the “heart” of the car, can have its performance gradually affected by severe carbon buildup. Guide / 07-18-2025Why 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. Guide / 09-23-2024AUTOOL Dry Ice Blaster Machine – A Suitable SolutionWhether you are a first-time buyer or an experienced user of dry ice cleaning machines, this guide will walk you through everything you need to know about the AUTOOL.Warranty And ContactWarranty And ContactFor 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 SupportUse 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 supportAir compressor pressure and dryer filter confirmationWalnut shell abrasive size and package option confirmation23-adapter compatibility and intake port fitment helpPackage contents and accessory confirmationOperation, troubleshooting, and replacement accessory support3-year warranty support for eligible non-human damage casesLifetime maintenance supportEmail Support[email protected] WhatsApp Support 86 189 2647 7404