## How to interpret the engine compression test results?

CASE 2: One or more cylinders had a low compression value compared to the others. This could be normal or it could be causing a problem. To find out if the compression values are normal or not, go to: How To Interpret The Engine Compression Test Results. CASE 3: All compression values were similar and above 120 PSI.

### How long does it take to do a compression test?

When everything is ready, have your helper crank the engine. It usually takes about 10 seconds of engine cranking to get the maximum compression reading. Once the compression gauge’s needle stops climbing, have your helper stop cranking the engine.

#### Is it normal to have low compression values?

CASE 2: One or more cylinders had a low compression value compared to the others. This could be normal or it could be causing a problem. To find out if the compression values are normal or not, go to: How To Interpret The Engine Compression Test Results.

How to do a compression test on a 2.2L Chevy Cavalier?

Let’s say that my 2.2L Chevy Cavalier gave me following compression values when I did a compression test on all 8 cylinders: The next step is to do the math: STEP 1: 175 x 0.15 = 26.25. STEP 2: 26.25 = 26 (rounded to nearest one). STEP 3: 175 – 26 = 149. ANSWER: 149 PSI. Any cylinder with this compression (or lower) value will misfire.

How to do an engine compression test in Spanish?

Related Test Articles. You can find this tutorial in Spanish here: Cómo Probar La Compresión Del Motor (GM 2.0L, 2.2L, 2.5L) (at: autotecnico-online.com ). Each cylinder, besides needing air, fuel, and spark, to contribute to engine power, also needs to be in good mechanical condition.

When everything is ready, have your helper crank the engine. It usually takes about 10 seconds of engine cranking to get the maximum compression reading. Once the compression gauge’s needle stops climbing, have your helper stop cranking the engine.

Let’s say that my 2.2L Chevy Cavalier gave me following compression values when I did a compression test on all 8 cylinders: The next step is to do the math: STEP 1: 175 x 0.15 = 26.25. STEP 2: 26.25 = 26 (rounded to nearest one). STEP 3: 175 – 26 = 149. ANSWER: 149 PSI. Any cylinder with this compression (or lower) value will misfire.

## What does 0 psi mean on engine compression test?

CASE 1: All cylinders had 0 PSI. This test result tells you that the engine has an internal mechanical problem. The most common causes of this condition is a broken timing chain or a blown head gasket. Your next step should be to check the condition of the timing chain. I would also recommend that you check for a blown head gasket.