Low compression causes! Diagnosing burnt valve, head gasket, or piston rings??

Low engine compression causes and diagnosis! Head gasket, burnt valve, piston ring issues? This video will help you find out why you have low cylinder compression. Follow along as I test out different products on my Volvo v70XC in the quest for the best! OTC is a good and reliable tester https://amzn.to/33e4QOD Cheap leakdown compression tester: https://amzn.to/3Z4e5Sj