Just did a Valve Wobble test and all 6 ECI cylinders are out of spec. Max wobble per lycoming Service Bulletin 388C for my valve is .035. Cylinders 2,4 and 6 were between .045 and .050. All other cylinders were near or at .035 limit.
I do not have any issues but decided to do the test due to the hours on the engine. The IO540 engine has 1400 hours from brand new ECI cylinders and has been running well. Oil consumption has been 1 qt per 10 hours and borescope shows good symmetrical pattern on all valves.
So my question for the engine experts is what to do next? Rework or replace the cylinders that are out of limit? I hate to do major surgery on a perfectly good running engine but want to the right thing. The SB, although it indicates upper limits for valve wobble was issued to check for tight clearances and sticky valve issue.
Thank you.
I do not have any issues but decided to do the test due to the hours on the engine. The IO540 engine has 1400 hours from brand new ECI cylinders and has been running well. Oil consumption has been 1 qt per 10 hours and borescope shows good symmetrical pattern on all valves.
So my question for the engine experts is what to do next? Rework or replace the cylinders that are out of limit? I hate to do major surgery on a perfectly good running engine but want to the right thing. The SB, although it indicates upper limits for valve wobble was issued to check for tight clearances and sticky valve issue.
Thank you.