LIQUI MOLY Pro-Line Intake System Cleaner Diesel 400ml – 5168 is a professional diesel intake system cleaner designed to remove contamination and deposits from the intake manifold, intake valves and throttle valve area.

Its powerful solvent and additive formulation helps dissolve oil, soot, resin and other deposits, restoring smooth movement of intake system components and helping improve engine reliability. It is suitable for modern diesel engines, including vehicles fitted with EGR systems and diesel particulate filters (DPF).

Key Features & Benefits

• Brand: LIQUI MOLY
• Product Range: Pro-Line
• Part Number: 5168
• Product Type: Diesel Intake System Cleaner
• Pack Size: 400ml
• Removes soot, oil, resin and intake deposits
• Cleans intake manifolds and intake valves
• Cleans the throttle valve area
• Helps restore smooth operation of moving intake components
• Helps improve engine reliability
• Supports more economical engine operation
• Rapid cleaning action
• Cleaning possible without dismantling the intake system
• Suitable for vehicles with EGR valves
• Suitable for vehicles with diesel particulate filters (DPF)
• Designed for professional servicing and preventative maintenance
• Suitable only for diesel engines

Specifications

Product: Pro-Line Intake System Cleaner Diesel | Type: Intake & Throttle System Cleaner | Engine Type: Diesel | Form: Aerosol | Capacity: 400ml | Colour: Amber / Cloudy | Part Number: 5168

Application & Usage

Create access to the intake system downstream of the air flow meter, turbocharger and charge-air cooler, preferably as close as possible to the intake manifold.

Start the engine and maintain at least 2,000 rpm.

Spray the cleaner into the intake system in short 2–3 second intervals, moving the spray probe back and forth to distribute the product throughout the intake tract.

If engine speed increases by more than approximately 1,000 rpm, stop spraying immediately and allow the engine speed to stabilise.

After treatment, allow the engine to continue running at approximately 2,000 rpm for around 20 seconds to burn off any remaining cleaner.

Common Customer Search Terms

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Important: LIQUI MOLY Pro-Line Intake System Cleaner Diesel 5168 is designed for professional use in diesel intake systems only. Do not spray directly onto the air flow meter, turbocharger or painted surfaces. Follow the application procedure carefully, as incorrect use can cause engine damage.