Liqui Moly Pro-Line Intake System Cleaner Diesel EGR Cleaner - 4x400ml
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Full details
This guide is for diesel engine owners and mechanics looking to maintain and improve engine performance. The key benefit is its ability to effectively dissolve and remove stubborn deposits from the intake system without disassembly, leading to restored fuel efficiency and engine reliability. A caveat is that it requires careful application and specific access points in the engine's intake tract. The Liqui Moly Pro-Line Intake System Cleaner is an active solvent designed to eliminate contamination and deposits in diesel engine intake manifolds and valves, compatible with diesel particulate filters (DPF).
All features
| Model Part Number | 5168 |
|---|---|
| Brand | Liqui Moly |
Extended Product Information
FAQs
Is this product suitable for gasoline engines?
No, this specific product, Liqui Moly Pro-Line Intake System Cleaner Diesel EGR Cleaner, is designed and formulated exclusively for diesel engines.
Can I use this cleaner if my diesel engine has a DPF?
Yes, this cleaner is specifically stated to be compatible with diesel particulate filters (DPF).
How often should I use this intake system cleaner?
It is suitable for use during inspections as preventive maintenance to avoid deposit buildup. The exact frequency can depend on driving conditions and engine usage, but regular checks and application as needed are recommended.
What is the ideal RPM to run the engine during application?
You should maintain a minimum engine speed of 2,000 RPM during application. Avoid letting the engine speed increase by more than 1,000 RPM from the initial 2,000 RPM during spraying.
What if I can't find a suitable access point after the airflow meter?
If the engine cannot run with the intake pipe removed, you may need to unplug the air flow meter (with ignition off). Be aware that this may require clearing fault codes and re-calibrating the sensor using a diagnostic tool afterward.
Can I spray this directly onto the air flow meter?
No, you must avoid contact with the air flow meter and painted parts. Ensure application is directed into the intake tract downstream of these components.
What should I do after cleaning?
After applying the cleaner, run the engine for approximately 20 seconds at 2,000 RPM to burn off any residues. This ensures a clean finish.
Troubleshooting
Engine runs rough or stalls after application.
This can occur if too much product was sprayed at once or if the air flow meter was affected. Ensure the engine is allowed to burn off residues at 2,000 RPM. If the air flow meter was unplugged, re-calibrate it using a diagnostic tool.
Deposits are not completely removed after one application.
For stubborn or heavy deposits, a second application may be necessary. Follow the application steps again, ensuring thorough coverage.
Check engine light illuminates after use.
This could be related to the air flow meter. If the meter was disconnected, clear fault codes using a diagnostic tool and re-calibrate the sensor. If the issue persists, consult a professional mechanic.
Product is not spraying correctly.
Ensure the spray probe is securely fitted to the can. Check for any blockages in the probe. Store cans upright and avoid extreme temperatures.
Pros and Cons
Pros
- Cleans intake system without disassembly.
- Effectively removes soot, oil, and resin deposits.
- Compatible with diesel particulate filters (DPF).
- Helps restore engine performance and fuel efficiency.
- Increases diesel engine reliability.
Cons
- Requires specific access points in the intake system.
- Application process needs careful attention to engine RPM.
- Potential contact with sensitive components like the airflow meter must be avoided.
- May require a second application for very stubborn deposits.
Setup, Compatibility & Care
Compatibility:
- This product is suitable only for diesel engines.
- It is compatible with diesel particulate filters (DPF).
Setup & Application:
- Locate Access Point: Identify an access point in the intake system *after* the air flow meter, turbocharger, and intercooler. The ideal location is just before the intake manifold.
- Prepare the Can: Fit the spray probe onto the can. Do not remove the spray head after fitting.
- Start the Engine: Start the diesel engine and allow it to reach a minimum speed of 2,000 RPM.
- Spray in Bursts: Apply the cleaner in short bursts (2-3 seconds at a time) into the identified access point.
- Ensure Thorough Cleaning: Move the spray probe during application to cover all areas of the intake tract.
- Monitor Engine Speed: If the engine speed increases by more than 1,000 RPM during application, stop spraying.
- Final Burn-off: After the application, run the engine for approximately 20 seconds at 2,000 RPM to burn off any remaining residues.
Important Precautions:
- Avoid Contact: Ensure the cleaner does not come into contact with the air flow meter or painted surfaces.
- Engine Operation: If the engine cannot run with the intake pipe removed, you may need to unplug the air flow meter (with the ignition off). If this is the case, clear any stored faults with a diagnostic tool and re-calibrate the sensor as needed.
Care:
- Store the cans in a cool, dry place away from direct sunlight and heat sources.
- Use within the recommended shelf life to ensure product effectiveness.