Engine compression problems: possible causes and how to detect them

Engine compression problems, a process that takes place when air and fuel mix in the cylinders of an engine, are usually caused by a loss of compression.

When this happens, the compression process does not occur correctly and the engine does not reach its full performance. We review the possible causes of engine compression loss and how we can detect the problems .

Causes of Engine Compression Loss

The most common causes that cause a decrease in engine compression are usually related to failures in other parts that are related to its operation, such as the following:

  • Spark plug: produces leaks if it is in a bad position or in bad condition.
  • Oil: if it is of poor quality, the compression will be low.
  • Cylinder Head: If the cylinder head is damaged or installed incorrectly it will cause leaks and a drop in compression.
  • Segments: the problem comes when they are worn, causing gaps and leaks.
  • Timing of distribution: if the timing of distribution is not correct, the valves do not perform their function correctly or are damaged, they will cause leaks and a drop in compression.
  • Oil filter or catalyst: if the filters are clogged, bad compression will also occur.
  • Timing belt: wear could cause the camshaft to stop turning and the exhaust valve could not open correctly. This would cause the non-expulsion of gases.
  • Cylinders: Overheating can cause rings to seize or be damaged, in turn causing a failure to seal in the cylinder.
  • Head gasket: if the head gasket is damaged or broken, it would create a hole through which gases could leak. This would affect both compression and performance.
  • Leaky valves: each cylinder has an exhaust and intake valve at the top. If this element overheats, it could cause a premature loss of gas.

How to detect engine compression problems

A loss in compression usually produces a high reduction in the maximum pressure reached during combustion in the engine, so you have to be aware of the following points:

  • Do you perceive problems in starting or shutting down the engine?
  • Does the engine consume more water or coolant than usual?
  • Is there smoke coming out of the exhaust pipe?
  • Notice the rough idle?
  • Does the engine lose power?
  • Does fuel consumption increase?
  • Do you notice that the consumption of polluting emissions increases?

Now you know how to detect possible problems in the compression of your engine! If you do not trust your judgment, go to a professional. At Comercial Méndez we can advise you. In addition, we are specialists in the sale of leading brand engines in the market. Contact us .