---------------------------------------------------------- Yak-List Digest Archive --- Total Messages Posted Fri 08/24/12: 4 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 07:53 AM - obstruction to rotation (Joe Howse) 2. 08:37 AM - BREAKING REDSTAR NEWS! (Rico Jaeger) 3. 11:15 AM - Re: obstruction to rotation (Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E) 4. 12:53 PM - Re: obstruction to rotation (James Goolsby) ________________________________ Message 1 _____________________________________ Time: 07:53:59 AM PST US From: "Joe Howse" Subject: Yak-List: obstruction to rotation Thanks for all the advice, problem did turn out to be hydraulic lock, I had never felt one as severe before, thus my concern for something mechanical. Caution prevailed, removed spark plug. Carl Hayes (M14P_Inc.) suggested that perhaps the the engine had stopped with the crank pin and master rod bearing directly over #5 cylinder allow ing oil to drip into the cylinder and piston, oil could then migrate through the rings and into the combustion chamber, with that piston on the compression stroke ( valves closed ) oil was trapped. In retrospect we could have turned the engine backwards to open the intake valve draining the oil through our intake manifold drain system. Basic problem was oil reverse flow valve failed Have now sent our oil pump to M14-P-INC for their modification, to a ball and spring valve and seat to replace the original poppet type. Joe ________________________________ Message 2 _____________________________________ Time: 08:37:04 AM PST US Subject: Yak-List: BREAKING REDSTAR NEWS! From: Rico Jaeger IT'S JILL'S BIRTHDAY, YAKKERS!! Please be sure to thank her for ALL she (so positively) does for us all and wish her a HAPPY 29th! :) M-14P has been invaluable when in regard to furthering progress / maintaining my aircraft! If you're received kind service from Jill (And I KNOW you have!) take 30 seconds out of your day to appreciate someone so deserving! HAPPY B-DAY, JILL! (Don't hurt me) Rico ________________________________ Message 3 _____________________________________ Time: 11:15:30 AM PST US Subject: RE: Yak-List: obstruction to rotation From: "Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E" Caution on turning engine over backwards, especially with YAK-50's. Due to the "cant" of the engine, the oil runs out into the intake tubes. If you have an intake drain kit installed, and give it enough time, that oil will eventually come out via the intake drains. If you do not wait long enough, the oil will be "gulped" back into the cylinder and you stand a chance of bending a rod THAT way. Mark Bitterlich -----Original Message----- From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Joe Howse Sent: Friday, August 24, 2012 10:51 AM Subject: Yak-List: obstruction to rotation Thanks for all the advice, problem did turn out to be hydraulic lock, I had never felt one as severe before, thus my concern for something mechanical. Caution prevailed, removed spark plug. Carl Hayes (M14P_Inc.) suggested that perhaps the the engine had stopped with the crank pin and master rod bearing directly over #5 cylinder allow ing oil to drip into the cylinder and piston, oil could then migrate through the rings and into the combustion chamber, with that piston on the compression stroke ( valves closed ) oil was trapped. In retrospect we could have turned the engine backwards to open the intake valve draining the oil through our intake manifold drain system. Basic problem was oil reverse flow valve failed Have now sent our oil pump to M14-P-INC for their modification, to a ball and spring valve and seat to replace the original poppet type. Joe ________________________________ Message 4 _____________________________________ Time: 12:53:42 PM PST US Subject: Re: Yak-List: obstruction to rotation From: James Goolsby Great to hear it was as simple as that. Pappy Sent from my iPad from some where on The 3rd rock from the Sun. On Aug 24, 2012, at 10:51 AM, "Joe Howse" wrote: > Thanks for all the advice, problem did turn out to be hydraulic lock, I ha d never felt one as severe before, thus my concern for something mechanical .. > Caution prevailed, removed spark plug. > Carl Hayes (M14P_Inc.) suggested that perhaps the the engine had stopped w ith the crank pin and master rod bearing directly over #5 cylinder allow ing oil to drip into the cylinder and piston, oil could then migrate through th e rings and into the combustion chamber, with that piston on the compression stroke ( valves closed ) oil was trapped. > In retrospect we could have turned the engine backwards to open the intake valve draining the oil through our intake manifold drain system. > Basic problem was oil reverse flow valve failed > Have now sent our oil pump to M14-P-INC for their modification, to a ball a nd spring valve and seat to replace the original poppet type. > > Joe > > ========================== ========= ========================== ========= ========================== ========= ========================== ========= > ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message yak-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Yak-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/yak-list Browse Digests http://www.matronics.com/digest/yak-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.