Page 84 - 05. Subyek Teknik Mesin - Automobile Mechanical and Electrical Systems Automotive Technology Vehicle Maintenance and Repair (Vehicle Maintenance Repr Nv2) by Tom Denton

1 69

Figure 1.96 Cylinder head gaskets

1.6.15 Riveting

Riveting is a method of joining metal plates, fabric to metal or brake linings to the

shoes. A metal pin called a rivet, which has a head at one end, is inserted into
matching holes in two overlapping parts. The other end is struck and formed into
another head, holding the parts together. This is the basic principle of riveting,
but many variations are possible.
Figure 1.89 shows some pop rivets, which are one of the most common for
motor vehicle repair. These are hollow rivets which are already mounted on to
a steel pin. The rivet is placed through the holes in the parts to be joined and
a special rivet gun grips the pin and pulls it with great force. This causes the
second rivet head to be formed and when the pin reaches a set tension it breaks
off, leaving the rivet securely in place. The great advantage of this method is that
you can work blind. In other words, you don’t need access to the other side of
the hole.

1.6.16 Gaskets

Gaskets are used to make a fl uid- or pressure-tight seal between two component Key fact
faces. The best example of this is the cylinder head gasket, which also has to
Gaskets are used to make a fl uid- or
withstand very high pressures and temperatures ( Fig. 1.96 ). Gaskets are often
pressure-tight seal between two
used to make up for less than perfect surfaces and therefore act as a seal component faces.
between the surfaces. Also, as temperature changes, the gasket can take up the
difference in expansion between the two components. Gaskets are made from
different materials depending on the task they have to perform ( Table 1.27 ).