Siamesed cylinders

Blown head gasket at the hottest location between two siamesed cylinders
Gasket with a cooling channel between the two bores

Siamesed cylinders are engine cylinders arranged in such a way that they have no channels between them to allow water or other coolant to circulate.[1][2]

Cylinders are generally arranged in this manner when the engine block is of limited size or when stability of the cylinder bores is of concern, such as in racing engines.[3] The advantage is that the engine block will be reduced in size, or the bore can be increased in size. The disadvantage is a higher temperature between two cylinders, requiring a stronger engine block to avoid distortion of the metal, and better gasket sealing between the two bores.[1]

  1. ^ a b Wright, Gus (2021). Fundamentals of Medium/Heavy Duty Diesel Engines. Jones & Bartlett Learning. pp. 1612–1613, 1644, 1840. ISBN 978-1-284-15091-9. Retrieved 2024-11-12 – via Google Books.
  2. ^ Principles of automotive vehicles. Department of the Army. 1985. p. 9-2. Retrieved 2024-11-12 – via Google Books.
  3. ^ Baechtel, John (2012). Competition Engine Building: Advanced Engine Design and Assembly Techniques. CarTech Inc. p. 31. ISBN 9781934709627. Retrieved 2014-10-05 – via Google Books.