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Robins Seat and guide machines are used to repair worn or damaged valve seats and guides in cylinder heads. Valve seats are the areas in the cylinder head where the valves are located, and valve guides are the tubes that the valves fit into. Over time, these parts can wear out, causing problems with engine performance. Seat and guide machines can be used to cut new seats and install new guides, restoring the cylinder head to its original condition.
There are two types of seat and guide machines: manual and automatic. Manual machines are less expensive, but they require more skill to operate. Automatic machines are more expensive, but they are easier to use and can produce more consistent results.
The process of using a seat and guide machine begins by removing the cylinder head from the engine. The head is then cleaned and inspected to determine the extent of the damage. If the valve seats are only slightly worn, they can be recut. If the valve seats are severely worn or damaged, they must be replaced.
Once the valve seats have been cut or replaced, new valve guides must be installed. Valve guides can be installed using a variety of methods, including press-fit, interference fit, and adhesive. The method used will depend on the type of valve guide and the manufacturer's instructions.
Once the valve seats and guides have been installed, the cylinder head can be reinstalled in the engine. The head must be properly aligned and torqued to ensure that it is sealed properly.