Exhaust decisions / PowerFlow debate

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  On 4/1/2019 at 11:42 PM, 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: 

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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

Edited April 2, 2019 by M20Doc