>One other little thing. I was pulling off the exhaust system >for a look-see and also to replace some worn clamps. >When I pullled off one of the nuts, I pulled the entire stud >out of the cylinder (the nut was rusted on). How do I fix it? > >Steve Finkelman >Forney F1 CFIWR
Now you've when and broke your airplane. If you are not going to take care of it, you can't keep it. I'm next in line to take broken airplanes. I'll be there tomorrow to get it. Have all the log books ready. Shame. :-) You could be facing a easy problem, or a big pain. If the stud just screwed out, then just screw in a new one. For a new one: Get a new one from Univar or other company. Clean up the tread holes inside the head. Maybe add a oil or "Anti Seize" to the threads. Then my way: Put two nuts on the stud. Use brass nuts. Tighten the nuts so they lock. Put the stud into the head and tighten. Refer to your service manuals for the proper torque. Be careful, you don't want to damage the heads. Before putting the final torque on the nuts, remove the extra one. Then torque. If it is difficult to get the stud in, due to the alignment of the exhaust, remove the exhaust, put in the stud and then reinstall the exhaust ----Again, don't do anything to damage the head. Now if you took the threads out of the head with the rusted stud. Two possibilities - Univar sales a slightly oversize stud. Order one of these and do procedure above. It may work, probally won't. If you have no threads left, there is only one cure: Sacrifice your wallet on the cowling and take it to a A&P. You will need a heili core or the head will need taping for a larger, oversize, stud. Some shops have jigs that can be used to do the taping while the head is still on the engine, others may take the head off, - can you say goodbye bank account. Hope yours is the easy fix. If it just screwed out, you are lucky and it's easy. Have an A&P check it out after you are done. Nows a good time to replace the gaskets also. Check closely for leaks. My way: is to put a wet/dry vac. into the exhaust pipe. Seal with masking tape. Put the vac on blow and listen for leaks (Don't start you engine). Hoping for the best. Jack
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