How To Remove and Make clean Carbon Build Up in non-OHV Pocket-size Engines

What are Carbon Deposits?

Ane by-production of combustion is carbon, the blackness soot that can collect and harden on the cylinder head, cylinder wall, piston and valves. Carbon deposits in the combustion chamber can touch engine performance, resulting in higher oil consumption, engine knocking or overheating.

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Removing Engine Components for Cleaning

The first step in cleaning the cylinder head is getting access to the cylinder caput. You may need to remove some other components first.

  1. Unhook the spark plug wire and secure information technology, removing any batteries if equipped.

  2. Remove the muffler, muffler guard and whatsoever other components that block access to the cylinder. If y'all're unsure how to remove the muffler, follow our guide.

  3. Cylinder head bolts near the muffler and exhaust port may be longer. To avoid confusion, prepare a template. Describe a rough outline of the cylinder head on a piece of paper-thin and punch holes for each bolt location. Then, remove the cylinder head bolts and insert them in the corresponding holes.

  4. Lift off the cylinder head. If the caput sticks, strike information technology on the side with a nylon-faced hammer. This should loosen the cylinder head enough for you to gently lift if off the engine.NOTE: Practice not pry off the cylinder head. This can harm the surface of the engine block or the cylinder head.

  5. Remove and discard the erstwhile caput gasket.

Removing Carbon Buildup

Alert: Always clothing protective eyewear and solvent-proof gloves when removing carbon. Ask your Authorized Briggs & Stratton Dealer to recommend an all-purpose solvent that will not harm aluminum or plastic components or leave unwanted residues.

  1. Place the piston at the elevation dead center so that the valves are closed. Then, scrape carbon gently from the cylinder head, using a wooden or plastic scraper. Take care non to dig the scraper into the aluminum. On stubborn deposits, use a putty knife, wire brush or steel wool, taking intendance not to bear down on the metal surfaces.

  2. Make clean abroad the remaining carbon with solvent, using fine steel wool to smooth crude spots. Y'all tin can also soak metal parts for up to xv minutes to remove stubborn deposits. Scrape again, if necessary, to loosen stubborn dust. Then, clean the area thoroughly with the solvent and set up the head aside. With the piston however at the top of the cylinder and the valves closed, apply the aforementioned method to remove carbon deposits from the piston and the end of the cylinder.

  3. Turn the crankshaft to open each valve, and carefully remove any visible carbon deposits on the valves and valve seats, using only a brass wire brush.CAUTION: Practise non allow dust to fall into the valve chambers or between the piston and the cylinder wall.

  4. Inspect the valves and valve seats to see if they are croaky, rough or warped. Bring damaged parts to an authorized service dealer for inspection earlier reassembling the caput.

  5. Using a scraper, solvent or both, remove any remaining carbon and residue left behind by the head gasket on the cylinder head and engine cake. Make clean the surfaces thoroughly before installing the new head gasket. Any droppings or oil left on the cylinder head or engine cake may forbid a tight seal and cause eventual engine harm.

Re-assembling the Cylinder Head

  1. Inspect the surfaces of the engine block, cylinder head and new head gasket to exist sure they are clean.

  2. Place the new head gasket in position on the engine block. Do not utilise sealing compounds.

  3. Gear up the cylinder caput on the head gasket, aligning the cylinder head with the gasket and the engine block.

  4. Remove each head commodities from its slot in the cardboard template. Then, insert the commodities in its original location, leaving information technology loose. Insert the other bolts in the same way. Make certain to attach any housings or brackets that are held in place by the head bolts.

  5. Paw-tighten the head bolts first, without using a wrench.

  6. Tighten the cylinder head bolts in increments, using a torque wrench (service part number 19393). Turn each bolt a few turns, and then proceed to the next bolt until each bolt is just snug. For final tightening, use a torque wrench. Proceed in increments or roughly one-3rd the concluding torque. Consult your small engine manual for final torque specifications. Note: Avoid tightening a single bolt all the way earlier tightening the other bolts. Uneven tightening is probable to warp the cylinder head.

Alert: Ever read the engine and equipment manual(s) earlier starting, operating, or servicing your engine or equipment to avoid personal injury or property damage. See an authorized dealer if you are unsure of any process or take additional questions.

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