The health of your engine’s cylinders is essential to the longevity of your vehicle. Don’t be without a way to diagnose problems in the engine’s cylinders. Get the OEMTOOLS 37138 Compression Tester Gauge Set for an accurate reading on the health of your cylinders. This compression kit tester comes with a 14mm and 18mm 2-step compression test adapter and a compression gauge tester for servicing most cars and trucks. Inserting the adapters of our cylinder pressure tester into the spark plug ports is easy. Reaching the spark plug ports on your vehicle is no hassle thanks to the flexible design of the rubber hose extension in the cylinder compression tester kit. The O-rings on our adapters will give you a tight seal over the spark plug so that you receive an accurate airtight reading every time. Our compression gauge automotive tester reads from 0-300 PSI and can help diagnose sticking valves, cracked cylinder heads, worn cylinder walls, and more. Be sure to use the automotive compression tester on a known healthy cylinder before testing a suspected bad cylinder to get a good baseline reading. A healthy engine cylinder generally falls in the range of 100-150 PSI and this compression engine tester can help determine whether one or multiple cylinders are failing. Don’t be without a simple and efficient compression checker to conduct a compression test on your engine. Get the OEMTOOLS 37138 Compression Tester Gauge set today for ensuring the longevity of your vehicles.