---------------------------------------------------------- RV8-List Digest Archive --- Total Messages Posted Fri 04/22/16: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 05:56 AM - Thread chaser in spark plug hole (Miller John) ________________________________ Message 1 _____________________________________ Time: 05:56:05 AM PST US From: Miller John Subject: RV8-List: Thread chaser in spark plug hole Here is a caution tip for you. I normally use a thread chaser to clean out the carbon deposits in the spark plug threads during my annuals. Have done this successfully for a number of years. This year, the thread chaser went in too far and disengaged from the threads in #3 cylinder. All attempts to get it re-threaded coming back out failed, and I finally had to brute force it back out, destroying much of the threads tapped into the head in addition to the heli-coil insert. End result? New cylinder..repairing the old cost nearly as much as a new one. I might could have just taken the cylinder off and tried to work it back out from the inside, but by the time I thought of that, the thread chaser was stuck solid in the threads. Advice: if you use a thread chaser on the spark plug holes, put a washer or 2 on it so that it cannot drop out of the threads inside of the head. grumpy ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message rv8-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/RV8-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/rv8-list Browse Digests http://www.matronics.com/digest/rv8-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.