When removing screws, studs and fastening nuts from the part, remember the places where they were removed. Screw the bolt into place in the part, or install the washer and nut back on the stud to prevent them from being misplaced later. If this is difficult, put them in small boxes, tins, candy boxes and egg trays are ideal for this purpose; in each recess, you can put bolts and nuts from a certain part of the part. Containers of this type are useful when working with assemblies and very small parts, such as a carburetor. Mark each indentation with paint or a strip with a mark to indicate details.
When disconnecting plugs between two bundles of wires or even two wires, it is recommended to mark the two halves with numbered pieces of adhesive tape or a couple of pieces of colored tape of the same color - it will be easy to connect them correctly later.
Surfaces to be sealed with a gasket (removal of gaskets)
Gaskets seal the mating surfaces between two parts to prevent leakage of lubricants, liquids, vacuum, or pressure between them. Gaskets are often coated with a liquid or paste gasket sealant before parts are assembled. Service life, heat and pressure can cause such a strong «tacking» parts to each other that it is difficult to separate them. Often this «tacking» can be loosened by hitting a soft-faced hammer near the mating surfaces. You can use an ordinary hammer if you place a block of wood between it and the part, but do not hit with a hammer on cast or brittle parts that are easy to damage. If the part does not come off, look for a fastening bolt or nut that you forgot to remove.
Do not use a screwdriver or pry bar to pry the parts apart. This can easily damage the gasketed surfaces of the parts, which must be smooth to ensure proper sealing. If leverage is absolutely necessary, use the wooden handle of an old brush or hardwood rod.
After separating the parts, carefully scrape off the old gasket and wash the surface it seals. Some gaskets can be removed with a wire brush. If any gasket material does not come off, soak it in a rust impregnator or treat it with a special agent to soften it, then scrape it off. A scraper for this can be made from a piece of copper tube, flattening and sharpening one of its ends. Usually, copper is softer than the surface being cleaned, which reduces the likelihood of damage to the part. After processing, the mating surfaces should be clean and smooth. If the surface to be sealed with the gasket is scratched, cover the parts with a sufficiently thick layer of sealant when assembling the parts. For most surfaces, use a non-drying or semi-drying gasket sealant.