Metal gasket for cylinder head

A metal gasket for a cylinder head, said metal gasket having a lamination of plates and comprising:

• a base plate (2) formed of a metal plate, comprising cylinder holes (2a), formed corresponding to cylinder bores in a cylinder block on which a cylinder head for an internal combustion engine is mounted, circumferential beads (2b) having a both-sided sloped shape in cross section and formed around the peripheries of said cylinder holes, cooling water holes (2c) formed outside peripheries of said circumferential beads corresponding to a cooling water jacket for said cylinder block and cooling water holes in said cylinder head, and an outer bead (2d) having a one-sided sloped shape in cross section and formed and positioned so as to entirely enclose said circumferential beads and said cooling water holes,
• claw-shaped protrusions (3a) provided for one of an outer step adjustment plate (3) and an inner step adjustment plate (4) are inserted into engagement holes in the other of said inner step adjustment plate and said outer step adjustment plate,
• said outer step adjustment plate (3) is formed of a metal plate and extending from the position of said cooling water jacket to the positions of the outer edges of said base plates (2), while said inner step adjustment plate (4) is formed of a metal plate having a thicker thickness than said outer step adjustment plate (3) and extending from locations inside said circumferential beads (2b) of said base plates (2), to the position of said cooling water jacket, and
• portions of said claw-shaped protrusions (3a) projecting through said engagement holes are folded over so as to couple said outer adjustment plate (3) and said inner step adjustment plate (4), and thus overlapping said outer adjustment plate (3) and said inner step adjustment plate (4) with said base plate (2).

A metal gasket for a cylinder head comprising:

• a two-plate lamination formed of metal plates, said two-plate lamination having cylinder holes (4b) formed corresponding to cylinder bores in a cylinder block on which a cylinder head for an internal combustion engine is mounted, circumferential beads (4e) having a both-sided sloped shape in cross section and formed around the peripheries of said cylinder holes, cooling water holes (3b, 4c, 4d) formed outside the peripheries of said circumferential beads corresponding to a cooling water jacket for said cylinder block and cooling water holes in said cylinder head, and an outer bead (3e) having a one sided sloped shape in cross section and is formed and positioned so as to entirely enclose said circumferential beads and said cooling water holes,
• claw-shaped protrusions (3a) provided for one of an outer base plate (3) and an inner base plate (4) of said two-plate lamination are inserted into engagement holes in the other of said inner base plate and said outer base plate,
• said outer base plate (3) is formed of a metal plate and extending from the position of said cooling water jacket to the positions of the outer edges of said metal gasket (3, 4), while said inner base plate (4) is formed of a metal plate having a thicker thickness than said outer base plate (3) and extending from locations inside said circumferential beads (4e) of said base plate (4), to the position of said cooling water jacket, and
• portions of said claw-shaped protrusions (3a) projecting through said engagement holes are folded over so as to couple said outer base plate (3) and said inner base plate (4).