A1, German Car & BMW Bike Specialists

German Car & Bike Specialists

Independent BMW, Mercedes, Audi, VW Service and Parts Centre in Stevenage

Cylinder Walnut Blasting From £255 +vat

Modern engines are usually "direct injection", as this process allows for advantages in fuel consumption as compared to conventional fuel injection. However, the disadvantage of this is that the intake valves are not cleaned by the fuel. The intake valves are only in contact with air or rather blowby gases from the crankcase breathing circuit, in which substantial quantities of fuel and oil can be found. Over time, these lead to deposits of carbonised fuel and oil in the intake tract as well as on the intake valves themselves; this is also referred to as carbonising. This is not immediately bad for the engine, but over time can have a detrimental effect on its efficiency. If the valves are heavily carbonised, they may not close properly anymore, and symptoms such as a bumpy idle, vibrations and diminished throttle response can be observed; it may also contribute to increased oil consumption.

Here at A1 we can clean these intake valves by blasting fine walnut shell into your inlet. So if your car is more than three years old you will notice that the throttle response of the car is noticeably better (without hesitation), and the idle will be as smooth as it was when the car was brand new. There should also be a slight difference in engine power. Many of our customers can recommend this without any reservation for any car with a mileage of more than 30,000 miles.

Carbon Cleaning / Inlet Cleaning at A1 German Car & Bike Specialists

Our blasting tool uses pressurised air (usually 6-8 bar) to inject fine walnut shell granules into the intake tract. These granules hit the carbon dust at high speed and thus remove it entirely, while at the same time this material is soft enough not to damage the metal of the intake tract and the valves. That is also the reason why no other material should be used for cleaning. If you would like to enquire about valve cleaning and would like to see the improvements it could make to your vehicle's performance and fuel economy - then simply call the A1 team. They are on hand to answer any questions you might have.