Connecting Element
Cylinder-head bolts are the connecting
elements between engine
block, cylinder-head gasket, and
cylinder head. The bolt tightening
force is an important factor for
the mutual sealing of combustion
chamber, lubricant and coolant
channels, and the ambient air.
A task that must be performed
perfectly with cold or extremely
hot engines, at negative and high
positive pressures.
Surface Pressure
When tightening (torquing) the
cylinder-head bolts, the bolt force
generates the so-called surface
pressure, which is essential for
achieving a perfect seal. Hereby,
and in combination with the
applied torquing method, the bolts
have a strong effect on surface
pressure quality. |
When torquing the cylinder head bolts, the bolt force
generates a surface pressure, which is essential for
achieving a perfect seal.
TIP
Surface pressure describes the force per unit of
contact surface area between two components,
e.g. between cylinder head and head gasket,
or engine block and head gasket. As opposed
to the clamping force, surface pressure is not
constant across the entire contact area. |