Cooling System Maintenance

From Top-Up to Full Exchange: AUTOOL Redefines Coolant Maintenance

AUTOOL’s SC301 cooling system test and replenishment machine has long been recognized by many repair technicians for its vacuum testing and coolant filling functions. However, many customers still ask whether old fluid can be completely replaced and whether the entire cooling system can be cleaned.

AUTOOL now officially introduces the SC501 and SC611 coolant exchange machine concepts, upgrading cooling system service from replenishment only to complete replacement. The goal is to make coolant maintenance more thorough, professional, and easier for customers to understand.

01UpgradeFrom replenishment to complete replacement. 02Why NeededManual replacement leaves residue and air locks. 03New ModelsSC501 and SC611 core features. 04CompareSC301 vs SC501 vs SC611.
Service Upgrade

From Replenishment to Replacement: Professional Maintenance Upgraded

The earlier SC301 focused on testing and filling. The new service direction represented by SC501 and SC611 focuses on full coolant exchange, circulation flushing, and more visible maintenance results. This change turns coolant service from a simple top-up into a professional cooling system maintenance process.

Old Service Logic

Traditional coolant maintenance often solves only the question of how to add coolant. It may not fully remove old fluid, scale, rust, or impurities from the cooling system.

New Service Logic

A coolant exchange machine uses equal volume exchange and circulation cleaning to replace old fluid more thoroughly, improve service quality, and provide customers with a visible difference between new and old coolant.

Why It Matters

Why Is a Coolant Replacement Machine Necessary?

Many mechanics still use traditional methods to change coolant: disconnecting hoses, connecting a bucket, and manually adding fluid. This method is inefficient, and the replacement rate is usually only 50%-70%. Old fluid residue, air locks, and incomplete removal of impurities are common problems.

  • Equal Volume ExchangeNew coolant is added while old coolant is recovered, helping maintain balance during service.
  • Circulation CleaningThe system flushes scale, rust, and other impurities from the cooling circuit.
  • Higher Replacement RateCompared with manual draining and adding, a coolant replacement machine can achieve more thorough coolant replacement.
  • Reduced Air Lock RiskProper exchange and filling reduce the chance of air pockets that affect cooling performance.
New Product Launch

AUTOOL Coolant Exchange Machines

AUTOOL SC501 Smart Cooling System Flush & Exchange Machine

  • Circulation Flush FunctionEffectively removes scale, rust, and other impurities to improve heat dissipation efficiency and extend cooling system life.
  • Equal Exchange TechnologySimultaneously fills new fluid while recovering old fluid, achieving an exchange rate of nearly 100%.
  • Mechanical Knob ControlSimple and intuitive operation with no special training required.
  • Pressure Overload ProtectionPrevents excessive pressure from damaging the vehicle’s cooling system.
  • New/Old Fluid Comparison WindowTransparent hoses with sight glass allow visual confirmation of exchange quality.
  • 25L Large-Capacity TanksMeets the demands of continuous workshop use.
  • Quiet Operation DesignMinimal noise during operation supports a better working environment.

AUTOOL SC611 Smart Fully Automatic Cooling System Flush & Exchange Machine

  • One-Button Fully Automatic ExchangeAutomatically completes the coolant exchange process without repeated manual intervention.
  • Vacuum Hold Pressure ModeCreates a vacuum and performs a pressure-holding test to check for leaks in the cooling system.
  • Vacuum Fill ModeVacuum-assisted filling helps prevent air pockets, especially on high-end and new energy vehicles with complex cooling layouts.
  • Precise Flow ControlControls flow rate and pressure during exchange to prevent cooling system damage.
  • Circulation Flush and ProtectionRemoves scale, rust, and impurities while keeping pressure overload protection active.
  • Real-Time Fluid Level Display25L tanks and clear level display show new and old fluid levels.
Market Comparison

Comparison with Existing Tools on the Market

VS Traditional Vacuum Filling Tools

Traditional vacuum tools can only assist with filling. They cannot extract old coolant or flush the system. In essence, they solve the problem of how to add coolant, not how to change it thoroughly.

AUTOOL SC501/SC611 deliver professional-grade maintenance through active old coolant extraction, equal exchange technology, nearly 100% exchange rate, circulation flush, and electric pump design that requires no external air compressor.

VS Other Brand Exchange Machines

  • Large Capacity + Low Power Consumption25L tanks compared with common 20L competitor tanks, with 15W power consumption compared with many 60W+ designs.
  • More Practical Power SupplyAC independent power avoids relying on vehicle batteries and supports fixed workstation use.
  • Leading Vacuum TechnologySC611 integrates vacuum hold pressure testing and vacuum filling for high-end and new energy vehicles.
  • Outstanding Cost PerformanceSC501 uses mechanical knob control and affordable positioning to cover mainstream fuel vehicles.
Decision Table

Detailed Comparison of SC301, SC501, and SC611

Comparison ItemSC301 Coolant FillerSC501 Coolant Exchange MachineSC611 Coolant Exchange Machine
Product PositioningTesting + FillingMechanical Flush & ExchangeFully Automatic Flush & Exchange
Core FunctionsVacuum test, pressure leak test, coolant fillingCirculation flush, equal exchangeCirculation flush, equal exchange, vacuum test, vacuum filling
System Flushing CapabilityNoYesYes
Exchange Rate90%+Nearly 100%Nearly 100%
Operation MethodPush-buttonMechanical knobOne-button fully automatic
Vacuum Test FunctionYesNoYes
Vacuum Filling FunctionYesNoYes
Pressure Hold Test FunctionYesNoYes
Pressure Overload ProtectionYesYesYes
Real-Time Fluid Level DisplayDigital displayWindow displayWindow display
New/Old Fluid Comparison WindowNoYesYes
Power SupplyDC 12VAC 100-240VAC 100-240V
Power Rating–15W15W
Tank Capacity–25L25L
Pressure Range-1~2bar0-3.5kg/cm20-3.5kg/cm2
Vacuum Adjustment Range––-35~80kPa
Applicable VehiclesMainstream fuel vehiclesMainstream fuel vehiclesFuel vehicles + new energy vehicles + high-end vehicles

Existing AUTOOL Coolant Service Tools

The current product catalog includes SC301-related coolant test and filler tools, coolant boiling point testing, and SC301 accessory options. SC501/SC611 are discussed in this article as the full-exchange upgrade direction.

Purchase Recommendations

Which One Is Right for You?

Choose SC301 When

Your main need is coolant filling, vacuum testing, and pressure leak testing for mainstream fuel vehicles, and full circulation flushing is not the primary service item.

Choose SC501 When

You want to move from simple drain + refill service to deep cleaning and equal volume replacement for mainstream fuel vehicles, while keeping operation simple through mechanical knob control.

Choose SC611 When

You service high-end vehicles, new energy vehicles, or complex cooling system layouts that benefit from one-button full automatic exchange, vacuum hold pressure testing, vacuum filling, and precise flow control.

Business value: The value of SC501 and SC611 is not only the equipment itself. They help transform a low-value fluid drain + refill job that may be priced around 50 RMB into a professional deep cleaning and equal volume replacement service that customers can see, understand, and may accept at a higher service value such as 200 RMB when the workshop can clearly explain the difference.

Conclusion

Conclusion

From SC301 to SC501 and SC611, AUTOOL continues to provide the automotive repair industry with more professional and efficient maintenance equipment. The launch of the coolant changer marks a more complete layout in cooling system maintenance, moving from replenishment to replacement.

Thorough cleaning and equal volume replacement help every vehicle begin its next journey with a healthier cooling system. Contact the AUTOOL team for new product discounts, product details, and cooperation policies.

Need Coolant Exchange Machine Details?

Ask AUTOOL about SC301, SC501, SC611, coolant testing tools, accessories, new product discounts, and cooperation policies.

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