Replacing valve seals - everything you need to know
Content
Valve seals are components mounted on the head of the drive unit. Without them, it would be impossible to maintain the complete tightness of the cylinder block. They are responsible for sealing the valve stems and preventing oil from entering the cylinders. It is no secret that, like all other elements, they also naturally wear out after a while. If this happens, the valve stem seals will need to be replaced.
This operation is extremely difficult, but it can be done independently. Of course, only if you can demonstrate your knowledge of mechanics and your garage is equipped with the right tools. Check out how to replace valve seals yourself!
Replacing valve stem seals in a car - why is it so important?
Before you learn how to replace valve seals, you need to understand why this is so important. If you underestimate the signs of wear of these elements, you will have to consider the possibility of serious damage to the drive unit. As a result, the engine will need to be overhauled.
If you do not replace the valve stem seals in the car in time, you can expose yourself to repair costs of several thousand zł. In the case of used cars, this will often be disadvantageous. As a result, you will have no choice but to sell the damaged car or scrap it.
That is why it is so important to intervene in time. See how to replace valve seals.
Replacing valve stem seals in a car - when is it necessary?
It is worth knowing how to replace valve seals. But the important thing is to know when to do it. You certainly don't want to get rid of functional components. Therefore, you need to know the symptoms that will tell about their defeat.
The most common sign that valve seals need to be replaced is blue smoke from the exhaust pipe. However, do not confuse this sign with a black or white exhaust. The next alarming situation is the excessive consumption of oil, which can be encountered during its periodic measurement. In such cases, it is necessary to replace the valve seals.
However, when should it be carried out to prevent any failures? These elements should be replaced with new ones every 100 km. Otherwise, you will not only have to figure out how to replace valve stem seals, but also spend a lot of money on additional repairs.
How to replace valve seals yourself?
Before you start replacing valve seals, make sure you have all the necessary tools. The basic device is a special puller that will allow you to immediately dismantle the seals. If you buy such a product, pay attention to its compatibility with the drive installed in your car. The equipment itself should also be equipped with height and width adjustment, have long jaws.
Replacing valve stem seals in your vehicle will not be possible if you do not have an air compressor. This equipment is quite expensive, but you can borrow it from a friendly mechanic. If you have all the tools, see how to replace valve seals.
Replacing valve stem seals - steps
How to replace valve seals step by step? Follow the tips below and the whole process will be safe.
- Remove the engine covers to gain access to the valves. You will need to remove the protective elements of the head, cylinders and rocker arms. There is also no need to remove the spark plugs.
- Use an air compressor to adjust the pressure so that it is between 60 and 90.
- Rotate the crankshaft where you are replacing the seals so that it is at dead center.
- Connect the air compressor hose to the spark plug hole.
- The valves remain in their set position as long as the compressor is running.
- Using a puller, compress the valve spring and remove it. In some cases, you will have to help yourself with your hand or even with a hammer.
- Using pliers or screwdrivers, remove the damaged gasket and install a new one.
- Assemble all components in reverse order of disassembly and valve seal replacement is complete.
Replacing valve stem seals on mechanics - why is this the best solution?
Replacing valve stem seals is a very complex operation that requires disassembly of many components. During operation, it is possible to lead to the destruction of individual parts, which will significantly increase the cost of repairs. At the same time, the replacement of valve stem seals by a mechanic costs from 300 to 80 euros. However, thanks to him, you can be sure that the work performed will bring the expected results.
Replacing valve seals is quite expensive. However, delay with it can result in very serious problems and even more expensive engine repairs. So make sure you do it regularly.
