YSTOOL 8PCS Engine Compression Tester Kit Automotive 300PSI Cylinder Pressure Test Gauge Tool Set for Auto Car Truck Motorcycle Gasoline Petrol Gas Engine Diagnostic with Red Case

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About YSTOOL 8PCS Engine Compression Tester Kit

Package List 1x 300PSI / 20bar pressure gauge with quick coupler 1x 6" long straight push-on connector 1x 6" long curved push-on connector 1x 16" rubber resin hose with 14mm adapter 1x 10mmx1.0 adapter 1x 12mmx1.25 adapter 1x 14mmx1.25 adapter 1x 18mmx1.5 adapter 1x Instruction 1x Red case Wide Application Gasoline engine on truck car ATV mower and so on. Not for most diesel engine, because of the low pressure gauge range 0-300PSI, which is much lower than most diesel engine compression Test Result A variation in compression readings between cylinders is often a good indication of engine problems, for example: Valve sticking Carbon build-up Piston or cylinder head modified Cracked cylinder head or defective main gasket Poorly seated or worn piston rings Burned or damaged piston Customer Service 30 Days MONEY BACK Guarantee for any reason For 30 days after purchase, return your undamaged products and you will receive a full refund. 12 Months Warranty for quality-related issues For 1 year after purchase, we will deal with all quality-related issues by part of REPLACEMENT OR REFUND Please contact us by Amazon message system if there is any question. We will reply in 24 hours.