Walnut Blasting in Rotherham

What is Walnut Blasting?

Walnut blasting is the process of removing carbon build up from the intake ports and valves using compressed air and crushed walnut shells.

As you can see from the image at the side, there is a remarkable difference with the before and after.

Walnut blasting can be carried out without removing the cylinder head. We simply remove the inlet manifold and any other components which may prevent us from accessing the inlet ports We check the valves are closed, if they are not we rotate the cranksahft until they are closed on the port we are working on. Making sure we have a good seal around the inlet port and the vacuum is attatched to the seal we insert the nozzle that shoots the walnut and compressed air through a small hole and pull the trigger, releasing the crushed walnut shells into the port and sucking them back out again. Carbon deposits are cleaned from the surfaces and are sucked up the vacuum hose, leaving the inlet ports looking nice and clean.

Why Walnut Shells?

Walnut shells are abrasive enough to remove carbon from a surface, but not hard enough to impact or damage engine components. In the unlikely event some drops into the combustion chamber, it wont matter as it will burn off once the engine is running.

Why Clean My Inlet Ports?

For emissions reasons most newer cars (Petrol & Diesel) are fitted with an EGR valve.

The EGR valve works by recirculating a certain amount of exhaust gases back into the engine, through the intake system, reducing the emissions.

The problem with this process is the exhaust gas contains carbon deposits which will then stick to surfaces and continue to create a build up of carbon over time. Removing this carbon build up restores lost power and economy.

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