Walnut blasting in Birmingham and the West Midlands, done properly.
Kovac Services Ltd specialise in intake valve and port carbon cleaning for direct-injection petrol engines and selected diesel intake systems. This service is ideal for customers who already know they want walnut blasting, whether that is based on their own research or advice from another garage.
- ✅Proper access, not shortcut cleaning. Intake manifold removed where required so the job is done directly, not guessed through the intake.
- 🔧Useful add-ons available in the same visit. Intake manifold cleaning, EGR cleaning, throttle body cleaning and ultrasonic injector cleaning for suitable petrol injectors.
- ⏱Typical turnaround is next working day. Enough time to do awkward access jobs carefully rather than rushing the strip-down.
Send your registration, mileage, engine details and symptoms. Best suited to customers who have already decided they want the service or have been referred for it.
Areas covered include Birmingham, Halesowen, Dudley, Stourbridge, Bromsgrove, Kidderminster and surrounding West Midlands areas.
Appointment-only workshop service
Clear drop-off process, proper access to the vehicle and realistic time allowed for the job.
Before and after proof
Where possible, we can show photos or video of your own intake valves and ports.
Guide pricing up front
Transparent starting prices so you know the rough cost before you enquire.
Specialist service focus
Set up for customers who already know they want walnut blasting or have been advised to book it.
When walnut blasting is worth considering
This page is aimed at customers who already have walnut blasting in mind, whether through research or recommendation.
Common signs linked to intake carbon build-up
- •Rough idle, hesitation or flat spots under load
- •Poor throttle response or reduced performance
- •Misfire symptoms or uneven running on direct-injection engines
- •Loss of smoothness on higher-mileage engines
- •Visible heavy deposits during intake inspection or borescope checks
Who this service is for
- •Customers already looking specifically for walnut blasting
- •Owners referred by another garage or specialist
- •Enquiries where intake carbon cleaning is already the planned route
- •Vehicles booked for walnut blasting with or without add-on intake cleaning
Specialist walnut blasting and intake carbon cleaning in Halesowen
The core service is walnut blasting of intake valves and ports. Extra cleaning work can be combined during the same strip-down to save time and labour where appropriate.
How we carry out the service
- ✔Full access where needed. Intake manifold removed so each port can be cleaned directly.
- ✔Valve position controlled. We rotate the engine so the cylinder being cleaned has its valves closed.
- ✔Controlled media and extraction. Crushed walnut shell media removes carbon while vacuum extraction keeps the job tidy and controlled.
- ✔Reassembly and checks. Everything is refitted carefully and checked before handover.
Main service and common add-ons
- •Walnut blasting for direct-injection petrol engines
- •Selected diesel intake and EGR-related carbon cleaning work
- •Intake manifold cleaning from £99
- •EGR cleaning from £99
- •Throttle body cleaning from £99
- •Ultrasonic injector cleaning for suitable petrol injectors from £99
Why this beats “quick clean” gimmicks
Sprays, tank additives and hype-heavy “carbon clean” claims often get marketed as miracle fixes. Heavy deposits on intake valves usually need a direct physical cleaning method, not wishful thinking through a bottle.
Why customers choose this method
- •It physically removes heavy deposits rather than just washing around them
- •It targets the area where direct-injection engines commonly suffer build-up
- •It is suitable for serious intake contamination when performed correctly
- •It pairs well with manifold, EGR and throttle body cleaning while already stripped down
What we do not pretend
- •No fake “like new in every case” claims
- •No miracle-fix nonsense
- •No vague “engine clean” fluff instead of explaining the actual work
How the walnut blasting job is carried out
Every engine layout is a little different, but the flow below gives customers a realistic picture of what happens.
Vehicle booking and intake check
We confirm the vehicle details, engine type and booked work before beginning the strip-down.
Strip-down for access
Intake parts, covers and ancillaries are removed. Some engines require more access time than others.
Port-by-port walnut blasting
Each port is cleaned with the valves closed and extraction running so the carbon can be removed safely and directly.
Optional add-on cleaning
Intake manifold cleaning, EGR cleaning, throttle body cleaning and ultrasonic injector cleaning for suitable petrol injectors can be carried out during the same visit.
Reassembly and checks
Everything is refitted carefully and the vehicle is checked before handover.
Aftercare and handover
We explain what was found, what was cleaned, and any sensible aftercare advice for your engine.
Guide pricing for walnut blasting
Final pricing depends on engine layout, access and chosen add-ons, but these figures give a realistic starting point before booking.
Walnut blasting guide prices
Includes strip-down, intake valve and port cleaning, and reassembly. Gaskets charged separately at cost where needed.
Prices shown are from.
Exact figure confirmed before work starts.
Typical turnaround
Most jobs are planned on a next-working-day turnaround. Some vehicles need extra access time, and that is built into the booking plan rather than rushed on the day.
What happens after you enquire
Send the form with your registration, engine details, mileage and symptoms. We review it, confirm the booked service and then provide pricing and available dates.
Real examples of carbon build-up removal
Visual proof matters. These examples show the kind of contamination that can build up and the sort of result walnut blasting is designed to achieve.
Cylinder ports – before & after 1
Cylinder ports – before & after 2
Audi RS4 – before
Audi RS4 – after
Where possible, we can provide before and after images or video from your own vehicle so you can see what was actually cleaned.
Questions customers usually ask before booking
This section helps visitors make a sensible decision and gives Google more context about what the page actually covers.
What is walnut blasting?+
Walnut blasting is a method of removing carbon deposits from intake valves and ports using crushed walnut shell media. It is especially relevant on direct-injection engines where fuel does not wash the back of the valves in the way older systems did.
How do I know if my engine may need walnut blasting?+
Typical signs include hesitation, rough idle, flat spots, reduced response, misfire-like symptoms or heavy deposits visible on inspection. Many customers come to us after research or after being advised by another garage.
Do you work on petrol and diesel engines?+
Yes. Most enquiries are for direct-injection petrol engines, but selected diesel intake and EGR-related cases may also be suitable depending on the layout and the nature of the build-up.
What add-ons can be done at the same time?+
Common add-ons include intake manifold cleaning, EGR cleaning, throttle body cleaning, and ultrasonic injector cleaning for suitable petrol injectors. Add-ons are from £99 per item.
Do you offer diagnosis as well?+
Yes, but as a separate service. Fault diagnosis can be booked separately at £109 per hour.
Do I need to book in advance?+
Yes. Visits are strictly by appointment only, so please contact the workshop before travelling.
Request a walnut blasting quote or booking
Send us the vehicle details and the symptoms. We will reply with pricing and available dates for the service you want to book.