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Just bought a compression tester, so I'll join the discussion by asking..
What psi/bar-ranges would indicate major trouble? What is normal readings?
I have two 617's (.910 & .912) and a 616.934, they're well worn all three of them. At what point should I know on the gauge glass and mumble "uh oh"?
Valves are adjusted on all of them.
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Tomas, Sweden
1966 Mercedes Benz 230S with OM617.912, automatic. Disk brakes from W108
1983 Mercedes Benz 300TD grey, OM617.912 and 5-speed manual
1983 Mercedes Benz 300TD blue 7-seater, OM617.912 and 5-speed manual
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