02/06/2026
AZS are now happy to announce we are offering walnut blasting as part of our services.
Get rid of the carbon build up and restore performance!
Why does carbon build up on direct-injection engines:
Fuel is injected directly into the cylinder.
Petrol no longer washes over the intake valves.
Oil vapour from the PCV system and EGR deposits stick to the valves.
Over time, thick carbon accumulates.
Benefits of walnut blasting
✅ Restores lost power
Carbon deposits can restrict airflow.
Cleaning the valves improves breathing and performance.
✅ Smoother idle
Carbon can disturb airflow at low engine speeds.
Engines often idle more smoothly afterwards.
✅ Improved throttle response
Better airflow means the engine responds more sharply.
✅ Reduced misfires
Heavy deposits can disrupt airflow and combustion.
Cleaning can cure some misfire issues.
✅ Potential fuel economy improvement
Particularly if carbon build-up was severe.
