AUTOOL HTS518 Car Engine Carbon Deposition Cleaner Intake Pipe Valve Cleaning Machine Decarbonizing Auto Decarbon Wash

AUTOOL HTS518Product OverviewThe AUTOOL HTS518 is a 1400W walnut shell blasting machine for removing stubborn carbon deposits from the intake pipe and the backside of intake valves. It combines walnut abrasive blasting, vacuum recovery, dust filtering, 23 intake adapters, a 30L tank, and a trolley-style body to help workshops clean carbon buildup more efficiently.1400W Power 30L Capacity 23 Adapters External Air Required0.6-1.2mmWalnut Abrasive2-4kgSuggested Fill1-3 minPer Cleaning3 YearsWarranty Support Click to enlargeBefore You Order And UseBefore You Order And UseConfirm the abrasive, air compressor, cleaning range, intake valve position, and reuse rules before ordering or operating the walnut blaster.External Air Compressor RequiredHTS518 needs an external high-pressure air compressor for blasting. The air compressor is not included in the package.Use Dry Filtered AirUse an air compressor with stable pressure and a dryer filter when possible. Moisture may cause walnut shell media to clump and reduce blasting performance.6 Bar Or Above RecommendedThe original air compressor configuration calls for up to 0.7MPa and generally 6 bar or more. Always follow safe workshop and vehicle service limits.Walnut Sand Not IncludedWalnut shell abrasive is not included. Prepare 0.6-1.2mm walnut abrasive before use, or purchase compatible walnut sand separately.Intake System OnlyHTS518 is designed for the engine intake pipe and intake valve backside. It is not for injector, throttle valve, cylinder, or combustion chamber cleaning.Clean Port By PortClose the intake valve before blasting. Clean one intake port each time; a 6-cylinder engine should be cleaned six times, one port at a time.Safety And Media RemindersHigh-precision intake systems, such as BMW Valvetronic systems, are sensitive to foreign matter. Make sure the intake valve is closed and visible media is recovered before restarting the engine.Walnut powder is a natural polishing material with hardness lower than metal but higher than carbon deposits, helping remove buildup without damaging the metal surface when used correctly.Small residual walnut powder may burn to ash after the engine starts, but visible media should still be recovered and the intake should be checked before startup.Chemical cleaning agents may corrode pipes or shorten service life if used improperly; walnut blasting avoids soaking the intake with chemical fluid.Key FeaturesKey FeaturesHTS518 focuses on intake carbon removal, simultaneous spraying and recovery, reusable walnut abrasive separation, adapter coverage, and workshop mobility.1400W Strong SuctionThe 1400W motor provides strong vacuum recovery while the external air source delivers blasting force for carbon deposit removal.Deep Intake Carbon RemovalHelps remove sticky carbon deposits from the intake manifold area and intake valve backside, supporting better airflow and smoother engine operation.Spray And Recovery TogetherThe integrated design allows walnut grit to be sprayed and recovered simultaneously, reducing scattered media during the cleaning process.Built-In Dust FilterThe internal filter separates recovered walnut sand grit from carbon deposits so the abrasive can be reused when the condition allows.23 Intake AdaptersThe 23-adapter set improves fitment coverage for many intake port shapes, including common applications for BMW, Volkswagen, Mercedes-Benz, GM, Volvo, Nissan, Toyota, Honda, Audi, and more.Workshop-Friendly BodyA rear storage box, three-section telescoping handle, and 360° swivel casters make it easier to store adapters and move the unit around the service area. Click to enlarge Click to enlarge Click to enlarge Click to enlarge Click to enlarge Click to enlargeHow It WorksHow It WorksHTS518 uses a closed-loop walnut shell blasting process: abrasive impact loosens carbon deposits, while vacuum recovery collects media and residue for filtering.Close The Intake ValveBefore blasting, turn the crankshaft to close the intake valve for the port being cleaned. This helps keep media out of the combustion area.Spray Walnut AbrasiveThe external air compressor drives walnut powder through the blasting gun into the intake port, where repeated impact breaks down hard carbon deposits.Recover Through VacuumThe recovery hose collects walnut powder and removed carbon residue during cleaning, helping keep the process controlled and cleaner.Separate And ReuseThe built-in filter separates carbon residue from walnut abrasive. Under normal conditions, the abrasive can usually be reused 5-10 times.Compatibility And FitmentCompatibility And FitmentUse the correct walnut shell abrasive size and confirm the cleaning target before service. HTS518 is for intake pipe and intake valve backside carbon cleaning only.0.6-1.2mm Walnut SandUse walnut shell abrasive between 0.6-1.2mm. Walnut sand is made from crushed walnut shells and screened by particle size.Natural Abrasive MaterialWalnut sand has strong wear resistance, pressure resistance, and a microporous surface. It provides good adsorption while avoiding corrosion or pollution when used correctly.Reusable 5-10 TimesThe abrasive can usually be reused 5-10 times under normal conditions. Replace it earlier if it is wet, clumped, contaminated, or no longer cleans effectively.Broad Adapter CoverageThe 23-adapter kit is designed for many intake port shapes and helps support common vehicle brands and engine layouts.Not For InjectorsDo not use HTS518 to clean fuel injectors. Choose an AUTOOL fuel injector cleaner if injector cleaning is required.Not For Combustion ChambersHTS518 does not support engine combustion chamber cleaning. For that requirement, compare the HTS728 model instead.How To UseHow To UseFollow the basic operating sequence below, then verify the intake port is clean and media is recovered before moving to the next cylinder.Add Walnut PowderOpen the head cover, pour in 2-4kg of 0.6-1.2mm walnut powder, press the dust guard firmly onto the walnut powder, and close the cover securely.Connect Gun And Recovery HoseJoin the spray gun muzzle and the recovery hose together. The recovery hose has an opening designed for the blasting nozzle and vacuum path.Prepare The Intake PortRemove the intake manifold, insert the spray gun into the intake port, and turn the crankshaft to close the intake valve for the port being cleaned.Connect Air And PowerConnect the external high-pressure air compressor to HTS518, then connect AC power. The air compressor is required and is not included.Clean And InspectStart cleaning for about 1-3 minutes depending on carbon buildup. Stop the machine, inspect the result, recover remaining media, and repeat for the next intake port if needed.Use NotesDo not start blasting until the target intake valve is closed.Clean one intake pipe or intake port each time.The cleaning process normally lasts 1-3 minutes, depending on the carbon deposition condition.Walnut powder can usually be reused 5-10 times, depending on contamination and moisture.Use a dryer filter on the air compressor to prevent walnut sand from clumping.Check for visible walnut media before starting the engine after cleaning.SpecificationsAUTOOL HTS518 Product SpecificationsHTS518 is a 30L, 1400W walnut shell blasting machine with vacuum recovery, 23 adapters, storage box, 360° casters, and a three-section telescoping handle.Core SpecificationsProductAUTOOL HTS518 Walnut Sand De-Carbon CleanerWorking PrincipleWalnut shell blasting with vacuum recoveryApplicationsIntake pipe and intake valve backside carbon cleaningInput Voltage110V / 220VRated Frequency50 / 60HzRated Power1400WVacuum Suction0.02MPaAir Flow<300L/min (<0.3 m³/min)Main Unit Capacity30LProduct Weight23.5kgPackage Dimensions520 × 520 × 890mmMedia And CompressorWalnut Shell Abrasive Size0.6-1.2mmSuggested Fill Amount2-4kg walnut powderAbrasive ReuseUsually 5-10 times under normal conditionsExternal Air CompressorRequired; not includedRecommended Air SetupDry-filtered air, generally 6 bar or aboveDesign And FunctionsConfigured Connectors23 typesStorage BoxYesPressure GaugeNoPressure SettingsNo pressure regulation knobMode SwitchHigh / Low Mode and Low-Speed ModeBuilt-In Dust FilterYesHEPA FilterNoEngine Combustion Chamber CleaningNo360° Swivel CasterYesThree-Section Telescoping HandleYes Click to enlarge Core SpecificationsProductAUTOOL HTS518 Walnut Sand De-Carbon CleanerWorking PrincipleWalnut shell blasting with vacuum recoveryApplicationsIntake pipe and intake valve backside carbon cleaningInput Voltage110V / 220VRated Frequency50 / 60HzRated Power1400WVacuum Suction0.02MPaAir Flow<300L/min (<0.3 m³/min)Main Unit Capacity30LProduct Weight23.5kgPackage Dimensions520 × 520 × 890mm Media And CompressorWalnut Shell Abrasive Size0.6-1.2mmSuggested Fill Amount2-4kg walnut powderAbrasive ReuseUsually 5-10 times under normal conditionsExternal Air CompressorRequired; not includedRecommended Air SetupDry-filtered air, generally 6 bar or above Design And FunctionsConfigured Connectors23 typesStorage BoxYesPressure GaugeNoPressure SettingsNo pressure regulation knobMode SwitchHigh / Low Mode and Low-Speed ModeBuilt-In Dust FilterYesHEPA FilterNoEngine Combustion Chamber CleaningNo360° Swivel CasterYesThree-Section Telescoping HandleYes Click to enlargeWhat Is In The BoxWhat Is In The BoxThe package includes the HTS518 main unit and accessories shown in the packing list image. Walnut sand and the external air compressor are not included.Main UnitAUTOOL HTS518 walnut sand de-carbon cleanerAdapters23 intake adapters shown in the packing list imageProtectionProtective goggles shown in the package imageCleaning ToolsSandblasting gun and black pipe adapters shown in the package imageRecovery HoseFlexible recovery hose shown in the package imageNot IncludedWalnut sand and high-pressure air compressorProduct ComparisonProduct ComparisonCompare HTS518 with HTS558, HTS559, HTS678, and HTS728 before choosing the right walnut blasting machine for your workshop.HTS518 Focus1400W, 30L capacity, 23 adapters, storage box, built-in dust filter, 360° caster, three-section telescoping handle, High/Low Mode, and Low-Speed Mode.HTS558Basic model with 1200W power, 13L capacity, 5 connector types, built-in dust filter, and 360° caster.HTS559Upgraded from HTS558 with 1400W power and 30L capacity, but still uses 5 connector types and has no storage box or mode switch.HTS6781500W workshop model with 10L capacity, pressure gauge, pressure regulation knob, standard/expert mode, HEPA filter, storage box, and telescoping handle.HTS728Expert-grade model using finer 0.4-0.6mm abrasive. It supports engine combustion chamber cleaning, pressure gauge, pressure regulation, HEPA filter, recovery mode, and filling mode.Decision CheckChoose HTS518 if you need a 30L intake walnut blaster with 23 adapters and mode switching. Choose HTS728 if combustion chamber cleaning is required. Click to enlargeRelated ProductsRelated ProductsCompare related AUTOOL walnut shell blasting machines and compatible walnut sand before ordering. The walnut sand accessory is included here because HTS518 requires abrasive media for use. 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 HTS518 manual for setup, walnut abrasive preparation, air compressor connection, operation, and safe-use instructions. Click to enlargeAUTOOL HTS518 Manual PDFOpen the PDF manual for product structure, setup guidance, operating steps, and maintenance notes. Download ManualNeed Setup Confirmation?Contact AUTOOL Store before ordering if you need to confirm air compressor requirements, walnut abrasive size, adapter compatibility, HTS518 versus HTS728 selection, or package contents.Email[email protected] WhatsApp 86 189 2647 7404Questions And AnswersThese answers cover walnut sand, carbon deposition, cleaning range, air compressor setup, abrasive reuse, model selection, package contents, and support. What Is AUTOOL HTS518 Used For? AUTOOL HTS518 is used for walnut shell blasting on the engine intake pipe and intake valve backside. It helps remove hard carbon deposits that may contribute to unstable idling, incomplete fuel combustion, lower power, weaker acceleration, and increased fuel consumption. What Is Walnut Sand? Walnut sand is made from crushed walnut shells that are screened and classified by size. It has good hardness, pressure resistance, wear resistance, and a microporous surface. As a natural abrasive, it can remove carbon deposits without corroding or polluting the cleaned metal surface when used properly. What Walnut Abrasive Size Should I Use? Use 0.6-1.2mm walnut shell abrasive for HTS518. Add about 2-4kg before cleaning. Do not use wet or clumped abrasive, because moisture can reduce blasting performance and may block the system. Is Walnut Sand Included In The Package? No. The package does not include walnut sand. Prepare compatible 0.6-1.2mm walnut abrasive separately before using HTS518. What Air Compressor Does HTS518 Need? HTS518 requires an external high-pressure air compressor, which is not included. The original configuration recommends up to 0.7MPa and generally 6 bar or more. A dryer filter is recommended to prevent moisture from causing walnut shell media to clump. Can HTS518 Clean Injectors, Throttle Valves, Cylinders, Or Combustion Chambers? No. HTS518 is designed for intake pipe and intake valve backside carbon cleaning only. For fuel injectors, choose an AUTOOL injector cleaner. For engine combustion chamber cleaning, compare the HTS728 model instead. What Is Carbon Deposition? Carbon deposition is the hard black buildup formed when hydrocarbon and olefin residues from incomplete fuel combustion attach to the intake and engine surfaces under high-temperature conditions. Why Should Carbon Deposits Be Cleaned? Carbon deposits may reduce the air-fuel ratio, lower engine output, increase fuel consumption, and cause engine shaking at idle. Cleaning is often considered around every 40,000-50,000km, depending on vehicle condition, fuel quality, driving environment, and maintenance history. How Long Does Each Cleaning Process Take? Each intake port usually takes about 1-3 minutes, depending on the carbon deposition condition. Clean one intake port at a time and inspect the result before moving to the next port. Can Walnut Abrasive Be Reused? Yes. Under normal conditions, walnut abrasive can usually be reused 5-10 times. Reuse depends on carbon contamination, moisture, clumping, and cleaning performance. Replace the abrasive if it becomes wet, dirty, or ineffective. What Is The Difference Between HTS558, HTS559, HTS518, HTS678, And HTS728? HTS558 is the basic 1200W model with 13L capacity and 5 connector types. HTS559 upgrades to 1400W and 30L capacity. HTS518 adds 23 adapters, a storage box, High/Low Mode, Low-Speed Mode, a telescoping handle, and a 30L body. HTS678 adds a pressure gauge, pressure regulation knob, standard/expert mode, HEPA filter, and 1500W power. HTS728 uses finer 0.4-0.6mm abrasive and supports engine combustion chamber cleaning. What Should I Check Before Starting The Engine After Cleaning? Check that the intake valve was closed during cleaning, visible walnut media has been recovered, the intake port is clean, tools and adapters are removed, and all intake components are reinstalled correctly. Small residual walnut powder may turn to ash at high temperature after the engine starts, but visible residue should still be removed first. What Accessories Are Included? Refer to the Packing List image for the final package contents. It shows the HTS518 main unit, 23 adapters, protective goggles, sandblasting gun, black pipe adapters, and recovery hose. Walnut sand and the external high-pressure air compressor are not included. How Long Is The Warranty? AUTOOL provides 3-year warranty support for eligible non-human damage cases. Contact support if you need help with parts, setup confirmation, adapter questions, walnut sand selection, or troubleshooting.Related GuidesRelated GuidesRead more about walnut shell carbon removal, walnut blasting versus dry ice blasting, and alternative engine cleaning methods. 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 / 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. 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.Warranty And ContactWarranty And ContactFor HTS518 model selection, walnut sand purchase, compressor setup, adapter confirmation, operation questions, package confirmation, or warranty support, contact AUTOOL Store directly.Pre-Sales And Product SupportUse support if you need help confirming whether HTS518 fits your intake cleaning requirement, whether HTS728 is better for combustion chamber cleaning, what walnut abrasive to buy, or how to connect the external air compressor.3-year warranty support for eligible non-human damage casesWalnut abrasive size and purchase guidanceExternal air compressor and dryer filter confirmationAdapter and vehicle intake compatibility confirmationHTS558 / HTS559 / HTS518 / HTS678 / HTS728 model selectionSetup, operation, package, and accessory troubleshootingEmail Support[email protected] WhatsApp Support 86 189 2647 7404