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Posted (edited)
1 hour ago, AlexLev said:

Embarrassing update: wanted to re-torque the bolts after the A&P bolted on the exhaust (after flying it) and instead of using 150 in lbs, used 150 ft lbs and broke off on the left rear exhaust stack/riser. Hope someone learns from my mistake.

@Shadrach or @M20Doc: curious if you have any ideas for how to work that out without damaging the cylinder? I'll be working with an A&P as well, but wondering if any of you have any experience on working that remaining stud out. I feel really dumb :(

See pics: 
868919249_ScreenShot2019-04-01at7_36_19PM.thumb.png.c9e31a18aebe54e49b3c86fddc6aef99.png

1450817099_ScreenShot2019-04-01at7_39_47PM.png.1ee35c6eb57aae006ff1855e9e792d08.png

It looks like there is enough of the stud remaining to extract it.  Pull the exhaust riser and gasket to expose it.  Ask your maintainer if he has a Snap On stud extractor like this one.  It’s a collet style that you thread on to the stud, then tighten the collet to grip the stud.  The stud will be a 5/16-18 NC thread.

Turn the engine over until the valve is closed, heat the inside of the port with a propane torch and turn the stud out.

Clarence

1103E796-A4BC-4BBD-AAA9-EF1DEE7A09CF.jpeg

Edited by M20Doc
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