Exhaust Dacia Logan

The Dacia Logan often experiences issues such as excessive exhaust noise caused by faulty exhaust valves, which increases engine noise and triggers dashboard error codes. Another common problem is excessive black smoke from leaking injectors, especially in diesel dCi engines. Clogged particulate filters (DPF) and EGR valves are frequent on diesel models, causing power loss and engine warning lights. Additionally, exhaust gases may sometimes enter the cabin due to various leaks or faults.

If you notice excessive noise from your exhaust or hear unusual sounds, it could be due to defective exhaust valves. We recommend having these valves inspected and replaced if necessary to avoid further damage and prevent error codes from appearing on the dashboard.

Black smoke usually indicates injector leakage or combustion problems. Common causes include:

• Leaking fuel injectors, especially in diesel dCi engines
• Dirty air filters restricting airflow
• Issues in the combustion process

Replacing faulty injectors and maintaining clean air filters can significantly reduce smoke emission and improve engine performance.

Diesel particulate filters (DPFs) clog quickly, especially with frequent urban driving. This causes:

• Reduced engine power
• Engine malfunction warning lights

Preventive cleaning using special additives or regular high-speed drives on highways can keep these parts functioning optimally. Professional cleaning costs range from £170 to £255, while full replacement can reach approximately £850.

Possible causes of exhaust gases entering the cabin include :

• Loose or damaged collector bolts on the cylinder head
• Clogged particulate filters
• Seal or bodywork issues after repairs

It is important to address these issues promptly to avoid exposure to harmful gases inside the car.

Different engines have unique concerns:

• 0.9 TCE petrol engine: Common thermostat seal leaks causing coolant loss, engine overheating, and wet spots under the engine. Repair costs range from £42 to £127 depending on parts changed.
• 1.6 MPI petrol engine: Known for robustness but relatively poor fuel economy and lack of driving dynamism.
• Diesel dCi engines: Suffer primarily from faulty injectors. Replacement cost is about £100 to £120 per injector, with full sets often replaced to maintain mechanical balance.

Regular inspection and timely repairs help maintain engine efficiency and exhaust performance.

To prevent exhaust problems, maintain the following:

• Regular engine oil changes every 15,000 km or less for intensive use
• Frequent checks of thermostat seals on the 0.9 TCE engine
• Periodic cleaning of the EGR valve using additives or high-speed driving on motorways
• Timing belt replacement every 60,000 to 120,000 km depending on the model

Following these recommendations helps extend the durability and efficiency of your exhaust system.

It is advisable to choose Logan models produced after 2013, as they have benefited from significant quality improvements in exhaust system components and engine robustness.

• Improved exhaust valve and sensor reliability
• Enhanced particulate filter and EGR system design
• Better engine and cooling system components to reduce leaks and failures

Selecting these newer models helps minimize repair costs and enhances overall driving experience.

For any exhaust replacement or repair needs, consider consulting professional garages equipped to handle Dacia Logan exhaust systems properly and safely.