---------------------------------------------------------- Europa-List Digest Archive --- Total Messages Posted Sun 09/03/23: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 06:31 AM - Re: ROTAX 9XX Hydraulic Lifters (Area-51) 2. 02:01 PM - KGEZ (William Daniell) ________________________________ Message 1 _____________________________________ Time: 06:31:35 AM PST US Subject: Europa-List: Re: ROTAX 9XX Hydraulic Lifters From: "Area-51" So an update on the 914F tear down. At first my initial thoughts were leaning toward operator error of insufficient engine warm up prior to T/O where the lifter to crankcase expansion lag was causing the lifter to not rotate; which was somewhat correct and not correct. There is always a reason for early component failure. Determining the root cause is not always that easy as there are often layers of factors to be thrown into the diagnostic possibility field. One thing noticed on the 914 while removing each lifter was how tight they each were during extraction and insertion through the unused portion of the lifter bore. Could this indicate the clearance upon assembly at the factory? Some gauges were turned up on the Czech Hobbymat lathe. One gauge was made oversize to determine unserviceable bore sizing. The other gauge was matched to the 914's unused portion of the bore. It was a good exercise and with the added benefit of learning how to perform 0.0005" precision passes. In the end the gauge revealed that the engine left the factory with 0.00015" operating clearance. This alone would prevent the lifter spinning in the bore as required. Introducing lifter to crankcase expansion lag would reduce this clearance further again. There is minor scuffing on the bore indicating metal to metal contact binding. With a cause now identified the lifter bores will be correctly sized and a new set of lifters fitted and lapped to the camshaft. Presenting the 914 CAD data into the 3D model does not bode well for the Classic, with the turbo compressor and induction pipe impacting the passenger footwell. Some bits will need to find a new posting. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=511396#511396 Attachments: http://forums.matronics.com//files/42972f4c_5cad_4877_9f44_1cf54b6e98d3_169.jpeg http://forums.matronics.com//files/5b1d56b0_b12b_4a4b_be33_72e70a7c0bc1_963.jpeg http://forums.matronics.com//files/314bff13_66a4_4d88_91ac_0399904f4617_446.jpeg ________________________________ Message 2 _____________________________________ Time: 02:01:41 PM PST US From: William Daniell Subject: Europa-List: KGEZ Anyone going from Florida or from a location in a direct line from FL to KGEZ? William Daniell LONGPORT +1 786 878 0246 ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message europa-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Europa-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/europa-list Browse Digests http://www.matronics.com/digest/europa-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.