Our Services

We have some great LiquiMoly intake cleaners for Petrol and Diesel, a spray product used while
the engine is running to assist with the cleaning the intake ports

Also available is a Walnut Blasting service. This is a more invasive tool but gives great results for
cleaning Carbon of the rear of the intake valves.

Walnut Blasting.
What is it? quite literally its a machine that uses compressed air and fine crushed walnut shells
to remove carbon build up. In our application, usually intake ports and the back sides of intake
valves.

Why do it? A lot of modern engines by design are prone to carbon build up in the intake system,
overtime as the carbon build up increases the efficiency of the engine reduces, meaningless
performance, fuel economy etc.

Why now for Te Rapa Auto Electrical? We deal with a lot of cars that suffer from carbon build
up, and a lot of our customers like to keep their cars not only going but going like they should!
We follow a lot of forums and in recent times have seen a lot of discussion on this topic. We also
don’t know of many local workshops that offer this service so decided now was the time. Its also
a good fit with our other Detox Tools and Tuning service we now provide.

Whats involved? There is some time involved and the time taken varies from car to car. We do
have to remove the intake manifold to gain access to the intake ports, this can mean on some
cars, intake runner flaps also need removing. Each cylinder is done separately as the valves need

to be in the closed position so as to not fill the cylinder with walnut shells, all other ports are
masked off etc to avoid walnut shells going where they are not wanted.
Why Walnut Shells? There is always a very small percentage of shells that are left behind. As
these are organic, they will burn off as part of the combustion process. Other media like glass or
sand etc are not suitable for this reason.