Factors responsible for low compression in car engine

05/13/2019

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Low compression engine ruins car performance and causes problems not bargained for. Read about factors responsible for this and how to prevent them!

Air and gasoline are combined to form a mixture in the engine’s cylinder during the internal combustion process. This is called car engine compression. For the combustion process to be effective and complete, the various cylinders must have adequate compression. When the compression is at a very low level in the cylinders, driving your car as well as you should becomes unattainable. At this point, there’s a drastic reduction in the engine performance. Accelerating your car onto high speeds turns difficult. In the event where the cylinders are completely empty of compression, starting the car will be impossible.

1. What are some factors responsible for low compression in car engine?

Identifying the root of a problem enables you to proffer lasting solution and prevent similar problems from occurring in the future. Some of the factors causing low compression in car engine are listed below for your reference, collected by Naijauto.com!

1.1. Faulty timing belt

The timing belt holds the camshaft and crankshaft together. This attachment facilitates their proper turning. When the timing belt is faulty, the camshaft won’t give way for the opening and closing of the exhaust valves as recommended. As a result of this, combustion will be absent in the cylinders, hence, there’ll be no gas coming out. The consequence of this is low compression.

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1.2. Damaged piston

Aluminum alloy is a component of the piston in engine cylinders. It’s particularly created to ensure that the combustion power of the engine is well sustained. But when the engine becomes very hot due to overheating, hot spots will be found in the piston’s alloy material. This can be managed if the hotness stops. But if it doesn’t, the hot spots will deteriorate into holes, giving fuel an opening to flow out without any restrictions. Having less gasoline in the cylinders causes low compression.

1.3. Damaged piston rings

Piston rings don’t need much heat. Exposing them to too much heat causes damage. The core function of these rings is to ensure that carbon gas doesn’t find its way out of the cylinder. When damaged, the rings lack the ability to withhold the carbon gas inside the cylinder. Once the gas is out, you’ll be left with low compression.

1.4. Valves leaking gas

You’ll find the intake and exhaust valves in every cylinder in an engine. Air and fuel first come into the intake valve before they move into the cylinders. When properly mixed together, combustion occurs, pushing exhaust fumes out of the cylinders.

The fumes released find their way through the valves just in time. When the valves endure too much heat, there’s a forceful release of fuel. Once this happens, there’ll be low compression.

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1.5. Bad head gasket

You’ll find the head gasket close to the head of the cylinder. It’s another tool that helps to ensure that gas is locked in the cylinder without any means of coming out. So, if for any reasons it’s damaged or develops a fault, gas leakage is inevitable. Gas leakage triggers low compression.

2. How to inspect the low compression in car engine?

If you have noticed the above signs in your car, and want to confirm that it’s truly a low compression problem, you should inspect it with a compression gauge.

Using a compression gauge effectively requires some skill. If you haven’t mastered this, you should save yourself the trouble, and take your car to an expert mechanic to do the work. But if you know how to use it, it won’t take you more than 45 minutes to get a response in regard to the diagnoses.

If the inspection results show low compression, critical components of your car engine might be damaged. Take a close look at the valves, gaskets, pistons and cylinders to know their condition. All damaged parts should be replaced to restore your engine’s performance.

>>> For more car maintenance tips, visit Naijauto.com.

Chris Odogwu

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