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How to Do a Car Compression Test

Want to know whether your car’s engine is working in its best condition or not? The compression test would be a must-try procedure for you. The car compression test not only helps you know about your car’s engine performance, but will also help you judge whether you need replacement of some engine parts, or not. So, if you are driving a car that is old and traveled miles, you should check the engine’s health by performing the simple yet beneficial car compression test.

Additionally, if you have recently experienced a performance drop in your car and want to be sure that everything is working as it should be, you should try your hands on the car compression test. Here, in the article, we will be talking about the steps you need to follow to perform the car compression test. So, be with us and check on your car’s engine health.

How to Do a Car Compression Test

Step-by-step procedure for car compression test

Before beginning the test, there are a few important prerequisites that you need to fulfill. Go through them once and make sure that you checked them all before starting the test.

  • Make sure that the engine is cooled down
  • Make sure that the ignition system is disabled
  • Make sure you have read your vehicle’s owner’s manual

Step 1: Invest in a good quality car compression kit

This is an important thing to consider. A good quality car compression kit can not only help you get better results, but will also make sure that you have invested your money in a reliable and durable product. So, be sure to check on the brand and build quality of the kit before purchasing it for you.

Step 2: Put the compression test adapter into the car’s first cylinder

The first thing to do with the compression kit is to put the test adapter to the car’s first cylinder.  Usually, the test adapter has threads that fit perfectly to the cylinder, if not, you can go through the manual to know about the right way to insert the test adapter into the cylinder.

Step 3: Connect the compression gauge to the other end of the hose

Next, keep the compression gauge in place so that it is easier to read and operate. YOU can refer to the manual of the testing kit to know about any essential precaution or point to deal with the compression gauge.

Step 4: Take your compression reading

Once the compression gauge and testing adapters are in place, you are ready to start the engine. Crank the engine twice or thrice and note the gauge’s reading.To get more reliable readings, we will suggest you to repeat the procedure one more time to get more efficient results.

Step 5: Remove the gauge and repeat the process for other cylinders

Repeat step 2-4 for each engine cylinder and interpret the results as per the user manual of the car compression kit.

These were the five simple steps to follow with the car compression tester. Just make sure to follow the steps as they are to get assured of the accurate results. Also, you can try your hands on the user’s manual of the car compression kit you have bought for yourself.


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