BMW Walnut Blasting

Restore Lost Power, Improve Idle Quality, Restore MPG!

A common fault of modern direct-injection engines, carbon build-up on the back of the intake valves robs you of performance, gives a poor idle, misfires and poor fuel economy!

Restore your  engine to top condition with our intake port walnut blasting / decarburising service. 

The detrimental carbon build up is an unwanted by-product of modern direct fuel injection systems, & affects many models across many manufacturers, not just BMW. Back in the day, the fuel used to be injected into the intake manifold, this had the effect of diluting the hot EGR flow, crankcase vapors & turbocharger oil-blow-by before it hit the rear of the hot valves. Today the injectors are located in the cylinder head & fired directly into the cylinders, this  “solvent wash” or dilution-effect is removed from the induction system leading to the build up of carbonised debris on the rear of the inlet valves, restricting air-flow. 

Some indicators that your BMW may need this service: 

  • General loss of power 
  • Flat spots throughout the rev range 
  • Poor or sluggish throttle response 
  • Misfires, particularly when cold 
  • Poor fuel economy 
  • Poor cold idle quality (rough idle etc) 

We replicate the BMW main dealer service by using a portable media blasting tool for this application, with genuine  BMW intake port adaptors. 

Usually after removing the intake manifold we use our equipment to ‘blast’  ground walnut shell media into the cylinder head intake ports at high velocity while simultaneously extracting them along  with the carbon build up debris.  When reassembling, we include new genuine BMW intake manifold & throttle body gaskets* (where applicable*) each time. 

To ensure the continued reliability & performance of your engine we typically recommend this service be undertaken  approximately every 50,000 miles.  

Prices from just £299 inc VAT. Please enquire for more information regarding your model.


5 Star - Had my e92 335i walnut blasted and done a fantastic job thanks. Very very helpful and friendly. Top quality customer service and highly recommended.

Peter Kenchington