Tips to Cleaning Carbon on Car Engine - A Complete (DIY) Guide

In a well-maintained car, you should be able to cover six-figure mileage without major repairs. However, it is reasonable to expect some drop-off in performance as a car gets older and components wear out. Is engine carbon cleaning an effective way to remove carbon from your engine? Do these products actually provide tangible benefits to your car, or are they just expensive snake oil?

To know all these answers, Car Carbon Cleaning is essential.

Why might you need your engine carbon cleaned?

First, let us examine the reasons why it might be necessary to clear an engine of carbon. Power is produced by burning fuels, which produce sooty exhaust gases. The amount of soot reaching the atmosphere is kept to a minimum by emissions control devices such as catalysts and diesel particulate filters, but some are still deposited on engine and exhaust system parts.

When modern oils and fuels were not invented, vintage cars would need to be ‘decoked’ every few thousand miles, which meant that the engine had to be opened up and the carbon deposits physically scraped off. However, some engines still need a carbon clean - especially (and ironically) those fitted with advanced emissions control equipment.

The fuel in gasoline cars actually cleans the components quite well as it passes through, thus making them less prone to ‘coking up’. Some modern engines, however, use Gasoline Direct Injection to improve efficiency. This technique allows petrol to be injected directly into the combustion chamber and not pass through as many parts. In other words, some GDI engines tend to get clogged. Following are some points relating of car carbon cleaning.

How to clean a car engine? A DIY guide:

1. Spark plug wires should be unhooked and secured, and any batteries should be removed.
2. Remove the muffler, muffler guard, and any other component that blocks access to the cylinder. Here is a step-by-step guide that will help you remove the muffler.
3. There may be longer bolts on the cylinder head near the muffler and exhaust port. Make a template to prevent confusion. Mark each bolt location on a piece of cardboard by drawing a rough outline of the cylinder head. Insert the bolts in the corresponding holes after removing the cylinder head bolts.
4. The cylinder head must be removed. To prevent the head from sticking, use a nylon-faced hammer to strike it from the side. The cylinder head should now be loose enough for you to lift it off the engine. Don’t pry the cylinder head off. It could damage the surface of the engine block or cylinder head.
5. The old head gasket should be removed and discarded.
6. The piston should be positioned at the top dead center so that the valves are closed. Then, gently scrape the carbon from the cylinder head with a wooden or plastic scraper. Avoid digging the scraper into the aluminum. Use a putty knife, wire brush, or steel wool to remove stubborn deposits, taking care not to damage the metal surfaces.
7. Using fine steel wool to smooth rough spots, remove the remaining carbon with solvent. Metal parts can also be soaked for up to 15 minutes to remove stubborn deposits. To loosen stubborn grit, scrape again if necessary. With the solvent, thoroughly clean the area and set aside the head. As long as the piston is still at the top of the cylinder and the valves are closed, use the same method to clean the piston and the end of the cylinder.
8. With a brass wire brush, remove any visible carbon deposits on the valves and valve seats by turning the crankshaft to open each valve. Keep grit out of the valve chambers and between the piston and cylinder wall.
9. Look for cracked, rough, or warped valve seats and valves. Before reassembling the head, bring damaged parts to an authorized service dealer for inspection.
10. Remove any carbon and residue left behind on the cylinder head and engine block by using a scraper, solvent, or both. After cleaning the surfaces completely, install a new head gasket. If debris or oil is left on the cylinder head or engine block, it may prevent a tight seal and result in engine damage.
11. Clean the surfaces of the engine block, the cylinder head and the new head gasket.
12. Attach the new head gasket to the engine block. Do not use any sealing compounds.
13. Align the cylinder head with the head gasket and engine block, then install the cylinder head on the head gasket.
14. Remove each head bolt from its corresponding slot in the cardboard template. Place each bolt loosely in its original position. Place the other bolts in the same way. Be sure to attach any housings or brackets that are held in place by the head bolts.
15. The head bolts should be hand-tightened first, without using a wrench.