The Hyundai Sonata comes with either a 4-cylinder or a V6 engine under the hood. When that engine runs poorly, a light compression test lets you comprehend what is misconception without tearing apart the engine. Some conventional problems diagnosed by performing a compression test are worn valves, pistons and rings.
Instructions
1. Enter on by warming up the engine in the Hyundai Sonata, because performing a compression criterion on a brumal engine produces inaccurate results. Beget undeniable that the battery is in acceptable shape further, so that it Testament be able to spin the engine distinct times.
2. Turn off the engine and disable the ignition development to avoid electrical shock during the countdown. Remove all four Glimmer plugs from the engine. Whether the Hyundai Sonata contains a V6 engine, there Testament be six Glimmer plugs.
3. Country the compression tester in one of the Glimmer plug holes and Eccentric person the starter. Rotating the engine builds compression on account of cylinder.5. Compare the compression numbers to each other. The difference should be no more than 10 PSI. Retest any cylinder that has a low reading by adding a small amount of motor oil to the cylinder and performing the test again.
Numbers should fall within 15 PSI of the recommended manufacturer specifications. For a Hyundai Sonata with a 4-cylinder engine, the ideal compression number is 10.5:1. If it has a V6 engine, the number should be 10.4:1.
Case the compression digit for that cylinder and then do the same for remainder of the cylinders, keeping track of the test results.4. Evaluate the compression test results. If the number increases, worn cylinder walls or piston rings are present. If the number stays the same, the cylinder has worn valves or valve seats instead.
