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AUTOOL SC301 Automotive Coolant Leak Detector and Filler

Name: AUTOOL SC301 Automotive Coolant Leak Detector and Filler
SKU: MMT212
Availability: InStock
Rating: 5.00 (7 reviews)

Rated 5.00 out of 5 based on 7 customer ratings

(7 customer reviews)

$350.00

Two Operation Modes: AUTOOL SC301 offers Filler Mode and Leak Detection Mode.
Cooling Pressure Test: Detecting cooling system leaks with a coolant pressure test.
Automatic Coolant Replacement: Cooling fluid can be replaced at the touch of a button through a combination of evacuation leak detection and pressure retention leak detection.

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coolant leak detector

AUTOOL SC301 Automotive Coolant Leak Detector and Filler is an innovative tool designed for automotive cooling systems, skillfully combining leak detection and coolant refilling capabilities.

AUTOOL SC301 coolant leak detector operates on a dual mechanism of vacuum extraction and pressure holding to identify leaks and execute coolant filling efficiently. The entire machine features high automation, convenient operation by a single person, and time-saving, and labor-saving advantages. It can effectively help users understand the status of the cooling system and provide corresponding maintenance solutions.

📔AUTOOL SC301 Coolant Leak Detector Manual

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AUTOOL SC301 Automotive Coolant Leak Detector and Filler Features

Two Operation Modes： To meet different maintenance needs, the SC301 offers two distinct modes: 1. Filler Mode: AUTOOL SC301 coolant vacuum filler Ensures fast and efficient coolant filling without air pockets. 2. Leak Detection Mode: AUTOOL SC301 coolant pressure test function provides accurate detection of leaks in the cooling system, preventing potential failures and costly repairs.
Three pressure Settings: Users can select the most suitable pressure level based on working conditions before starting the operation. For older vehicles, a lower pressure setting is recommended to ensure safety and effectiveness. The SC301 provides three pressure options: -35KPa, -40KPa and -45KPa. This flexibility allows for precise adjustments, ensuring optimal performance across various vehicle types.
Wide Compatibility: The SC301 coolant leak detector comes with three types of adapters, making it compatible with a wide range of vehicle models. This universal design enhances usability and convenience, eliminating the need for additional accessories.
High automation: With an intuitive digital display, users can easily monitor real-time data, streamlining the testing process. The simple and automated operation allows users to activate Filler Mode or Tester Mode with just a few steps. This advanced automation reduces manual effort, significantly improving efficiency compared to traditional methods.
Indicator design: The SC301 cooling system tester features two LED indicators: the red light stays on to indicate leakage, while the green light stays on when there is no leakage. Users can quickly identify cooling system issues using the leakage indicator, improving efficiency in the leakage detection process.
Three-Year Warranty, Lifetime Maintenance: For damage caused by non-human factors, AUTOOL promises to resend parts for free within 3 years. For any needs, you are warmly welcome to contact us and we will get back to you ASAP within 24 hours.

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Operating Instructions

Part 1: Basic Operation

Upon startup, both modes (Testing Mode and Filling Mode) will display their respective gear selections. When you select one mode, the gear display for the other mode will disappear. For example, if you select Testing Mode, the gear display for Filling Mode will not be visible.
There are three pressure settings based on vacuum pressure levels: -35KPa, -40KPa, and -45KPa.
In Filling Mode, you can choose the appropriate gear for vacuum pumping. After the vacuum pumping is complete, the system will automatically proceed to coolant filling. If it doesn’t fill, you can perform multiple filling cycles.
In Testing Mode, if the system cannot achieve and maintain the selected vacuum level, it will switch to pressure-holding mode within two minutes and display a fault reminder.

Part 2: Testing Mode

Note: Vehicle ignition is not required. Begin by opening the drain valve before starting the operation. (The vent valve is considered open when it aligns parallel to the air hose.)
Connect to a car battery or a 12V DC power supply and plug it into the machine’s rear power interface.
Toggle the switch to power on the machine. There will be a buzzer sound to indicate that the machine is starting.
Connect the air inlet hose to the air compressor.
Select the desired gear level based on vacuum pressure: -35KPa, -40KPa, or -45KPa.
Press the [Start/Stop] button to initiate machine operation. The machine will begin the vacuuming process. Wait for the vacuuming to complete, and the machine will automatically enter pressure-holding mode for 60 seconds. Afterward, it will provide an automatic leak detection indication.
The leak testing function utilizes LED lights to inform the user about the coolant tank’s condition. When there is a leak, the red LED light remains continuously lit, while in the absence of a leak, the green LED light remains continuously lit.

Part3: Filling Mode

Note: Begin by opening the drain valve before starting the operation. (The vent valve is open when it aligns parallel to the air hose.)
After completing the Testing Mode, select the Filling Mode to add coolant to the vehicle’s cooling system.
Connect the filling hose to the vehicle and place the coolant inlet hose into the coolant container.
Choose the appropriate gear level (for older vehicles, it’s advisable not to use the higher gear levels).
Press the [Start/Pause] button to initiate the vacuuming process. Once vacuuming is complete, the machine will automatically start adding coolant to the system.
After the filling is completed, press the [Stop] button.
After refilling, disconnect the connector from the vehicle.

Part 4: Drain Operation

Note: When draining the residual coolant, it is recommended to drain in an open area or use a container to collect the liquid.
After disconnecting the connector from the vehicle, close the drain valve by turning it downward. Press and hold the Tester Mode Start button until you hear the buzzer, then release. Press the Tester Mode Start button to clean the internal pipes; liquid will discharge from the filling port. When no liquid is coming out, press the Tester Mode stop button to finish draining. Turn off the power and remove the compressed air hose.

Packing List

Specification

Power Supply	DC 12V
Liquid Input Hose Length	0.5m
Pressure Range	-1~2bar
Operating Temperature	-10°C ~ 60°C
Filling Hose Length	2m
Packaging Weight	7.2kg
Air Outlet Hose Length	1m
Packaging Dimensions	370x310x416mm

Delivery

7 reviews for AUTOOL SC301 Automotive Coolant Leak Detector and Filler

5.0

Based on 7 reviews

5 star	100	100%
4 star		0%
3 star		0%
2 star		0%
1 star		0%

Customer Images

1-5 of 7 reviews

Pasquale Gallo

03/23/2026

The SC301 coolant detection and filling machine is very convenient to use; one person can operate it, and it has a high degree of automation. It can quickly detect leaks and add coolant at the same time, saving time and effort, making it ideal for routine maintenance and repairs.

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Enoch Newton

07/15/2025

Coolant can cause big problems if it leaks, and the AUTOOL SC301 Coolant Replacement Machine, which not only helped me with the coolant replacement, but also helped me to confirm if there was a fluid leak, helped a lot!

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Armstrong Temple

05/15/2025

The AUTOOL SC301 has helped me save money on trips to the garage, checking the cooling system for any problems with my own hands, filling the coolant along the way without having to bleed the air out repeatedly, filling it in one go, and helping me find subtle leaks, which is very reliable.

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Martin sdgdg

05/13/2025

Easy to use
The dual vacuum function is very effective¡ªit not only helps identify leaks with precision, but also allows you to refill the coolant system without introducing air pockets. It saved me a lot of time and effort compared to traditional methods.
Setup was straightforward, and the whole operation can easily be done by one person. I used it on my BMW 3 Series and was able to detect a slow leak in the radiator hose that I hadn¡¯t noticed before. After the repair, the vacuum fill feature helped me refill the coolant quickly and without mess.
The build quality feels solid, and the connections are secure. Definitely worth the investment if you’re serious about maintaining your own vehicles or working in a small garage. It¡¯s a tool I didn¡¯t know I needed¡ªuntil I had it.

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Griffith Alick

02/17/2025

really helped
This tool really helped me a lot! I was having a headache with leaks in the cooling system before, and after using this device, I was able to find the leaks very quickly, and the operation was not complicated, so it was easy for one person to handle. The process of filling and testing was smooth, no hassle encountered, and the quality seems pretty solid and reassuring to use. Overall, great value for money and recommended for those who need to test their cooling system themselves!

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