How to Use Sealer on Copper Exhaust Gaskets

Compressible copper head gaskets are found on several Palmer engines, including models B, C, D, E, BH and PW27, all for use as inboard or inboard-outboard engines. Built by Palmer Marine Engines between 1912 and 1959, these engines were two- or three-port, two-stroke gasoline engines. Earlier models came with a spark plug and buzz coil ignition system. When they are found, the engine's copper compression gaskets -- on the head and at the intake and exhaust manifolds -- may be salvageable.

Things You'll Need

  • Ratchet and socket
  • China marker
  • Stiff plastic putty knife or scraper
  • Clean worktable
  • Clean, soft cloths
  • Extra-fine buffing compound
  • Heat-resistant gasket compound
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Instructions

    • 1

      Remove the head cover, exhaust manifold or intake manifold of the engine, using a ratchet and the appropriate socket, if necessary. Mark the sides of the gasket with a china marker to denote which side faced the engine block.

    • 2

      Remove the gasket from the engine without bending it out of shape, if possible, using a stiff plastic putty knife or scraper.

    • 3

      Inspect the mating surface of the gasket for any nicks deep enough to snag a fingernail when the nail is dragged across it.

    • 4

      Lay the gasket flat on a clean worktable so that the side that was away from the engine block is face-up.

    • 5

      Polish the gasket by hand, using clean, soft cloths and extra-fine buffing compound. Turn the gasket over and polish the back side.

    • 6

      Apply a thin coat of a heat-resistant gasket compound to the surface of the copper gasket when the engine is ready for reassembly. Set the gasket into place using the alignment pins on the top of the cylinder block.

    • 7

      Apply a thin coat of gasket-sealing compound to the exposed surface of the gasket. Set the head cover in place. Secure the cover according to the torque specifications for the individual engine.