AUTOOL SDT203 Smoke Leak Detector

Product Introduction

Overview

The AUTOOL SDT203 automotive diagnostic leak detector is designed for testing leaks in vehicle pipe systems. It can be used on all cars, motorcycles, snowmobiles, ATVs, light trucks, boats, etc.

Working Theory

Low oxygen combustion

The AUTOOL smoke leak detector employs a forced combustion smoke generation method in a low oxygen environment. It is energized by a conductive column to the heating wire, which rapidly heats up to over 300°C, causing the mineral oil to reach its ignition point and combust. Due to the limited airflow, insufficient oxygen is available for complete combustion, leading to combustion primarily on the heating wire's surface. High-temperature heating allows the mineral oil to continue burning insufficiently around the wire, producing a large amount of smoke.

Features

Technical Parameters

Product Structure

Structure Diagram

The AUTOOL SDT203 features several key components:

• A: Hook port - Used for carrying or hanging the unit.
• B: Pressure gauge - Displays system pressure.
• C: Flow meter - Indicates smoke flow rate.
• D: Oil refill port - For adding smoke oil.
• E: Oil level gauge - Shows the current oil level.
• F: Start/Stop button - Controls smoke generation.
• G: Power LED - Indicates the unit is powered on.
• H: Working cycle LED - Shows the status of the smoke generation cycle.
• I: Velcro strap - For securing cables.
• J: Smoke outlet - Where smoke exits the unit.
• K: Power socket - For connecting the power cord.

Operations Instruction

Preparation Before Use

• Mount the Hook to the hook port (A) for carrying or hanging.
• Open the oil refill port (D), fill the reservoir with smoke oil. Ensure the oil level gauge (E) shows the oil is not more than 2cm above the bottom. Refill if the level is low.

• [Note] If overfilled, turn the unit upside down to drain excess oil.

• The unit is now ready for use.

Smoke Test

• Mount the smoke hose to the smoke outlet (J) and the power cord to the power socket (K).
• Connect the power cord to a 12V vehicle battery.

• [Note] Connect the red clamp to the positive (+) terminal and the black clamp to the negative (-) terminal of the battery. Ensure the vehicle battery is fully charged for optimal performance. Do not use a DC12V switch power supply. Only 12V vehicle batteries are permitted.

• The power LED (G) will illuminate, and the unit will begin generating pressurized air.
• Press the start/stop button (F); the working cycle LED (H) will turn on. The unit will generate smoke for a 5-minute cycle, stopping automatically.
• To manually stop smoke generation during a cycle, press the start/stop button (F) again. Allow the unit to blow out residual smoke from the nozzle.

Generic Operation

• Turn off the vehicle's ignition. The engine must be off for leak testing.
• Dismantle the air filter and throttle connections.
• Clean the inner wall of the intake opening to remove sharp objects, then insert the universal intake adapter.
• Mount the smoke hose to the smoke outlet (J) and connect the power cord to the power socket (K).
• Connect the power cord to the 12V vehicle battery.
• The power LED (G) will be on, indicating pressurized air generation.
• Introduce the smoke nozzle into the system using the cone adapter.
• Wait 30 seconds for the system to pressurize, then check the pressure gauge (B) and flow meter (C) for leak status.
• Remove the smoke nozzle from the cone adapter. Press the start/stop button (F); the working cycle LED (H) will activate, and the unit will generate smoke for an automatic 5-minute cycle.
• Reinsert the smoke nozzle into the cone adapter when significant smoke is visible from the nozzle.
• The system will be ready for leak checking in 2 minutes. Use a bright light or working lamp for assistance.
• After the test, if the working cycle LED (H) is still on, press the start/stop button (F) again to stop smoke generation.
• Store the smoke hose and power cord using the velcro straps. Hang the unit or stand it upright; do not lay it flat.

• [Note] Optional Cap Stoppers can be used to block openings for partial system tests or the intake opening, allowing the smoke nozzle to connect via other available openings.

Airbag Adapter Instructions

• Airbag adapters are suitable for non-circular connections. For round or oval ports, use the inlet tapered adapter.
• Before using the airbag adapter, clean the inner wall of the intake manifold or other test interfaces to prevent sharp protrusions from piercing the adapter.
• Insert the air bag (Z) into the test port.
• Press the hand pump (X) until the bladder (Z) inflates and seals the test port.
• Connect the cone head on the smoke outlet pipe to the smoke guide pipe (Y) to introduce smoke into the duct being tested.
• After testing, turn the pressure relief valve (W) counter-clockwise, remove the car air inlet adapter, clean it, and store it.

• [Note] Airbag adapters must not contact corrosive oil.

• Diagram description: The diagram shows components W (Pressure Relief Valve), X (Hand Pump), Y (Smoke Duct), and Z (Airbag).

Chemicals

• This unit uses paraffin wax, baby oil, or mineral oil as smoke oil, available at supermarkets or pharmacies.
• Use a needle-tip bottle or funnel to refill the smoke oil.
• If the smoke oil is overfilled, turn the unit upside down to drain excess oil.
• Drain and refill the oil every three months.

Description of Accessories

Maintenance Service

AUTOOL products are constructed from long-lasting, durable materials, adhering to a rigorous production process. Each unit undergoes 35 procedures and 12 inspection stages to ensure excellent quality and performance.

Maintenance Guidelines

• Avoid rubbing the product against rough surfaces, especially the sheet metal housing.
• Regularly check and tighten all connections. Ensure safe operation by addressing any loose parts promptly. Treat external and internal parts exposed to chemicals with anti-corrosion measures (rust removal, painting) to enhance durability.
• Adhere to safe operating procedures and avoid overloading the equipment. The product's safety guards are robust and reliable.
• Address unsafe factors immediately. Inspect circuit parts thoroughly and replace aging wires as needed.
• Periodically clean and replace consumable parts like the oil pump and oil filter. Adjust clearances and replace worn or broken parts. Avoid contact with corrosive liquids.
• Store the product in a dry place when not in use. Avoid storing it in hot, humid, or poorly ventilated environments.

Warranty

A three-year warranty is provided for the main unit from the date of receipt. All included accessories are covered by a one-year warranty.

Warranty Access

• Repair or replacement is determined by the product's breakdown situation.
• AUTOOL guarantees the use of brand-new components, accessories, or devices for repairs or replacements.
• If the product fails within 90 days of receipt, the buyer must provide video and pictures. AUTOOL will cover shipping costs and provide replacement accessories free of charge. For failures occurring after 90 days, the customer will bear the shipping cost, while AUTOOL will provide replacement parts free of charge.
• Conditions not covered by warranty:
• Products not purchased through official or authorized channels.
• Product breakdown due to failure to follow operating or maintenance instructions.

AUTOOL is committed to superb design and excellent service, offering further support as needed.

Disclaimer

• AUTOOL reserves the right to modify this manual and the machine without prior notice. Physical appearance and color may vary from the manual; refer to the actual product.
• While efforts have been made to ensure accuracy, inaccuracies may exist. For clarification, contact your dealer or AUTOOL after-service center. AUTOOL is not responsible for consequences arising from misunderstandings.

Return & Exchange Service

Return & Exchange Policy

• AUTOOL users unsatisfied with products purchased from authorized online platforms or offline dealers can return them within seven days of receipt or exchange them for a product of equal value within 30 days of delivery.
• Returned and exchanged products must be in fully saleable condition, including proof of sale, all accessories, and original packaging.
• AUTOOL will inspect returned items for eligibility. Items failing inspection will be returned without a refund.
• Exchanges can be processed through the customer service center or AUTOOL authorized distributors. Returns should be made to the point of purchase. For return/exchange issues, contact AUTOOL Customer Service.

Contact Information