Walnut Shell Intake Blasting BMW Service in Escondido
A BMW driver will experience a rough running engine, lack of power, a check engine light,
a power drop at varying RPM ranges or even noise due to the valve not completely closing from a heavy build-up.
Modern BMW engines are often direct injection, as this process allows for advantages in fuel consumption as compared to
conventional fuel injection, as well as yielding more power with an engine of identical displacement. The fuel is injected
directly into the combustion chamber of each cylinder and not in the intake tract. As a consequence, the fuel injectors
are no more placed before the intake valve, but directly in the cylinder itself.
The disadvantage of this is that the regular bathing and cleaning of the intake valves by way of the fuel that they
are exposed to does not happen any more. The end result is build-up on the back side of the intake valve and the walls
of the intake port. Causing a restriction at the most restricted area of the inlet tract.
Only BMW’s with direct injection are affected by this issue. BMW first offered direct injection with the 760Li E65/66 and
in the 2007 335i models.
BMW engines with direct injection.
BMW models with direct injection
- E90 335i
- E82/88 135i
- E60 535i
- E65/66 760Li
- F01/02 750i & 760i
- F10 528i & 535i (excluding first year model 528i)
- F30 328i & 335i
- F25 X3 3.5
- E70 X5 2011 and newer
Cleaning carbon build-up inside an engine can be a very costly and laborious routine.
But thankfully BMW has devised special equipment to allow for intake port cleaning with the engine assembled and in the
car. The procedure uses walnut shells ground to between .45 and .80mm or SAE20/30. Walnut blasting is just like sand blasting
but uses walnut shells which as organic
soft abrasives will not damage the intake valve, valve guide, or intake port. This same process is used to clean aircraft
engines, delicate electrical circuit boards, and has
been around since the late 1800’s. Here at North County Motor Works we strive to offer everything
possible to keep your BMW running great and outperforming the competition,
and until now this special BMW equipment has only been available at the dealer at a much higher cost.
BWM intake before walnut shell blasting
BWM intake after walnut shell blasting