WALNUT INTAKE BLASTING
Walnut intake blasting is a preventative maintenance service used to remove carbon buildup from intake valves on direct injection engines. Over time, fuel does not wash over the valves, allowing carbon deposits to accumulate and restrict airflow.
By blasting crushed walnut shells at the intake valves, we safely restore proper airflow, improve throttle response, and help recover lost performance. Regular walnut blasting helps maintain engine efficiency, smooth operation, and long term reliability.
Why Does Carbon Build Up Occur?
Carbon buildup occurs primarily in direct injection engines because fuel is injected directly into the combustion chamber rather than over the intake valves. Without fuel passing over the valves, oil vapors and combustion byproducts are free to stick and accumulate.
These deposits come from crankcase ventilation systems, blow by gases, and oil mist that are routed back into the intake for emissions control. Over time, heat causes these contaminants to bake onto the intake valves, leading to restricted airflow, reduced performance, and drivability issues if not addressed.
Is there a Permanent Solution to Prevent Carbon Build Up?
Unfortunately, there is no permanent solution that completely stops carbon buildup on direct injection engines. The design of the system allows oil vapors and blow by gases to contact the intake valves, which makes some level of buildup unavoidable over time.
However, buildup can be slowed through regular maintenance and driving habits. Catch cans, updated PCV components, high quality oil, and periodic walnut intake blasting all help reduce accumulation and keep deposits from reaching problematic levels. Preventative cleaning remains the most effective way to maintain performance and reliability.
How does Walnut Blasting Work?
Walnut blasting works by using finely crushed walnut shells and compressed air to remove carbon deposits from the intake valves. With the intake manifold removed, each cylinder is positioned with the valves closed, allowing the blasting process to clean the valve surfaces safely.
The walnut shells are abrasive enough to break down hardened carbon but soft enough not to damage metal components. Once the deposits are removed, the material is vacuumed out, leaving the intake valves clean and restored. This process improves airflow, throttle response, and overall engine performance without harming the engine.