Liqui Moly Pro-Line Diesel Intake System Cleaner 400 ml — workshop-strength solvent, restores throttle & intake flow

LIQUI Moly Pro-Line Diesel Intake System Cleaner is a 400 ml workshop-grade solvent blend formulated to dissolve and remove greasy deposits, soot and oil residues from diesel intake and throttle valve areas.

This professional-strength cleaner combines a high-tech additive package with active solvents to tackle common build-up in diesel intake systems. It is designed for targeted cleaning of the intake tract, throttle body and related components without disassembly in many service scenarios, helping restore moving-part function and improve combustion consistency.

How does this cleaner remove deposits in the intake and throttle valve area?

The formula uses powerful solvents to loosen carbon, oil and soot, while additives help dissolve greasy layers so they can be flushed away. Application dissolves sticky residues that restrict valve movement or alter airflow, making mechanical components respond more reliably.

• Active solvents penetrate and soften hardened carbon and oily films.
• Additives lift and suspend particles for easier removal during purge or intake strokes.
• Safe for directed use on intake tract surfaces when instructions are followed.

What performance benefits can I expect after using it?

Regular use can help restore smooth throttle and intake operation by freeing stuck components and reducing airflow obstruction. While results vary with condition and application, you can expect improved mechanical responsiveness and potential fuel-use optimization when the intake is free of heavy deposits.

• Reduces sticky carbon that impedes valve and flap movement.
• Helps maintain designed airflow for steadier engine response.
• Supports consistent combustion by clearing soot accumulation.

How is the product applied in a workshop setting?

Designed as a workshop product, it can be sprayed or introduced to the intake system following LIQUI Moly’s service instructions for diesel engines. Technicians use it during maintenance intervals or targeted cleaning jobs; proper ventilation and manufacturer-recommended procedures should be observed.

• Apply to throttle body or intake ports per service manual guidance.
• Allow dwell time for solvents to break down deposits before purging.
• Use protective equipment and work in a ventilated area for safety.

Will it affect seals, sensors or catalytic components?

The formula is engineered for intake-system cleaning, but compatibility depends on vehicle design and materials. Always follow LIQUI Moly application instructions and check compatibility with seals, plastic parts and sensors before use to avoid unintended contact or damage.

• Intended for directed cleaning of intake and throttle valve areas.
• Verify compatibility with specific engine components first.
• Avoid indiscriminate spraying near sensors or fragile plastics without guidance.

Who is this for? Automotive technicians, diesel fleet managers and experienced DIYers who perform intake maintenance will find LIQUI Moly Pro-Line Diesel Intake System Cleaner useful when addressing oil, soot and carbon build-up. It’s best suited for workshop environments where correct application and ventilation are available, and where restoring intake function and supporting reliable diesel operation are priorities.