Recent content by Paulsw55

Testing Compression relies on good battery voltage throughout the test and good starter performance for cranking speed. Compression ratio of 15:1 times Atmospheric 14.7 PSI = 220 psi on a good day with swift cranking . as battery volts go down and cranking speed goes down ,cranking pressure will...

Doing an air check will give you a more positive result. need to have an air fitting to put compressed air pressure down the spark hole with the piston top dead centre compression stroke . need to hold in this position maybe top gear . listen for air leakage exhaust for exhaust valve ,inlet for...