When to Use Asbestos Gaskets and Steels During Engine Overhaul
Car engines with ICE type, both gasoline and diesel, all use a cylinder head and cylinder block mechanism. These two sections each stand alone. However, the two will become one unit in a machine that is attached to the cylinder head bolt. Between the cylinder head and the cylinder block there is an important component, namely the cylinder head gasket.
Engine Overhaul
The term overhaul means inspection. In the four-wheeled automotive world, engine overhaul is the process of disassembling the engine to be inspected and repaired if there are components that are damaged. Sometimes, we know overhaul by the term 'down the engine' or 'split the engine'.
There are two types of overhauls, namely major and minor overhauls. In a major overhaul (sometimes called a total overhaul). In this case, a mechanic will check all the components of the car engine. Meanwhile in semi-overhaul (semi-overhaul engine), the mechanic will only check a few engine components, especially the cylinder head. For the cylinder block, it will only cover the condition of the cylinder and the condition of the piston from the top of the engine. Meanwhile, other inspections such as crankshaft bearings and crankshaft will not be checked mechanically.
Overhaul Destination
In general, the purpose of 'down the engine' or 'split the engine' is to restore the performance of the car engine if it starts to experience a decline in performance. It can also prevent the machine from being damaged. However, specifically, here is the purpose of the engine overhaul.
- Clean the combustion chamber of the car engine from dirt in the form of a pile of carbon.
- Check the condition of the components in the car engine. If it is damaged, the components inside the machine will be repaired or replaced. Usually this inspection includes the oil filter, piston, camshaft or camshaft, to the crankshaft or crankshaft.
- Reset the valve seat (valve seat) on the car engine.
- In essence, overhaul aims to restore the car's engine performance as before.
Asbestos Gasket vs Steels Gasket Selection
Whether it's a semi-overhaul or an engine overhaul, both will definitely require replacing the cylinder head gasket. How could this happen? Because actually the cylinder head gasket can only be used once. After that, we have to replace it. Thus, it is clear that either the semi or overhaul engine must replace the cylinder head gasket.
Then when should we use asbestos type or steel type?
We use asbestos gaskets during semi or overhauls that involve refitting or aligning the cylinder head and/or cylinder block. In this condition, the asbestos gasket is better than the plate with the consideration that we will not get a 100% precise flatness like the condition of the machine from the manufacturer. Therefore, it is better to use asbestos type gaskets when the cylinder head repair condition or cylinder block is curved.
Meanwhile, other conditions, namely the cylinder head and cylinder block are in good condition, so we need to choose the type of plate. The steel type is more robust and resistant to high compression.
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