Modern engines are powerful and efficient, but over time, carbon buildup can rob them of performance. At Mr. Mechanic Auto Repair, we're proud to be one of the only shops in Lethbridge offering intake decarbonization using walnut blasting: the most effective and safe way to clean intake valves on direct-injection engines.
What Is Intake Decarbonization?
In most modern direct-injection engines (like those from BMW, Audi, Volkswagen, and other European makes), fuel no longer washes over the intake valves. As a result, oil vapors and carbon deposits gradually build up on the valves and intake ports. This buildup restricts airflow, reduces power, and can cause misfires or rough idle.
Our walnut blasting process uses finely crushed walnut shells and compressed air to safely remove those deposits, without damaging your engine components.

Benefits
- Restores lost power and throttle response
- Smooths out rough idle and misfires
- Improves fuel economy
- Safe for engine components: no harsh chemicals, no disassembly beyond the intake
Signs You Might Need Walnut Blasting
- Loss of power or throttle response
- Rough idle or engine misfires
- Poor fuel economy
- Check engine light (often from intake valve buildup)
If your vehicle has over 80,000 km and uses a direct-injection engine, there's a good chance it could benefit from intake decarbonization.
Noticing performance loss?
Restore your engine's performance and efficiency the right way, with Lethbridge's trusted experts.