deCarbon Cleaning Specialist

Due to modern unburned hydrocarbon regulations, vapors from the crankcase are usually vented into the intake stream in order to prevent oil droplets from escaping through the exhaust. In a port injection traditional engine, these droplets are washed off the neck of the intake valve by a relatively constant stream of fuel. In a direct injection engine, the gasoline doesnn’t touch the intake side of the valve. As a result, the droplets have a tendency to bake onto the valve and cause significant carbon deposits causing a reduction in performance, rough idling, difficulty starting and eventually bad sealing of the valves. To add to this effect, many advanced Direct Injection engines also include exhaust gas recirculation in order to lean out the combustion mixture and reduce in-cylinder temperatures for certain combustion modes. Since Direct Injection combustion has the ability to produce far more soot than premixed combustion (port injection), the problem is magnified.

Even more alarming is that these deposits can dislodge and damage other downstream components (turbochargers, catalytic converters, etc.). Manufacturers have added systems to capture these oil droplets and particulates, but no system is 100% effective. Cars with as low as 50,000km are affected and will benefit from the clean. Even diesel engines haven’t been immune to these issues.

Symptoms of carbon build up are typically:

• Rough Idle
• Poor Throttle Response
• Flat Spots In The Vehicle’s Power Band
• Lack Of Engine Power
• Engine Misfires
• Loss Of Fuel Economy
• Cold Start Idle Issues
• Engine Check Light

Cleaning Process

Using the correct tools creating a clean surface whilst preventing any damage to sensitive engine components. The process is as follows:

• Removal of inlet manifold following manufacturers procedures
• Inspection of the valves and rear of the throttle body
• Closing of the valves on the port to be worked on by crankshaft rotation
• Using walnut blasting method, walnut granules are then blasted directly on the valves and intake port, carefully clean each inlet port
• Walnut shells are hard enough to remove the carbon but not hard enough to damage the valves or intake port.
• Using vacuum cleaner sucks out both the carbon & walnut shells. This process is repeated several times until clean and repeated for each intake.
• The inlet manifold is then replaced using new original gaskets.

deCarbon uses this process as it is both cost and time affective

Why US?

It is important to note that we have never heard or seen a solution other than manual cleaning to remove this carbon. Pure hydrogen engine decarbonise machine will only clean underneath of the intake valves around the combustion chamber, where the bulk of the carbon is around the valves stem. The carbon slowly built up to the point where any decarboniser chemical, service, hydrogen engine decarboning machine or the like will not work. The carbon has built up so much even the most aggressive chemicals couldn’t take off that amount of carbon.

Take action now and get your engine intake port carbon cleaned.