912ul differential compression test
in 912 / 914 Technical Questions
12 years ago
Good evening all. My first differential compression test has given me some odd results.( Engine warmed up )1+3 80/80 2+4 80/76. 2+4 are causing a gurgling when I reach 40psi upwards. I have read that this is normal yet 1+3 aren't causing this. Could someone provide some pointers as to what this may be. Are the piston rings going to need looking at?
