---------------------------------------------------------- Yak-List Digest Archive --- Total Messages Posted Sat 06/19/21: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 07:13 PM - Oil temp still too high (Jon Boede) ________________________________ Message 1 _____________________________________ Time: 07:13:30 PM PST US From: Jon Boede Subject: Yak-List: Oil temp still too high My oil temperature continues to be too high during engine break-in despite attempts to mitigate it. Engine: zero-time overhaul M-14P, standard compression Barrett pistons, aut o harness, no other engine mods (on a stock CJ-6A) Does have Criag's oil filter kit. Oil cooler recently overhauled by Pacifi c Coast. Previously I had very high oil temps and high CHTs so I went from a 1.4mm s uction jet to a 1.3mm suction jet and switched from Aeroshell 100 straight mineral to Aeroshell 120 straight mineral (which is quite hard to find!) Ambient air temperature 36C/97F. Field elevation 500 MSL. Engine start showed oil pressure at 5 bar with inlet temp 35C. Take-off at 2900 RPM and full throttle resulted in CHTs climbing to 210C an d oil inlet temp to 65C, outlet climbing to 85C, oil pressure 5 bar. Settled in a little lower than pattern altitude due to high CHT then CHT ca me back to 160-170C at 650-700mm MAP. Oil pressure 4 bar at 2400 rpm. Oil temp continued to climb to 75C inlet temp, 100-110C outlet temp, while CHT 160C, oil pressure 4 bar at 2400 rpm. Two circuits in the pattern at ~650mm MAP, oil inlet temp stabilizes at 75- 80C, outlet 110C, CHT 160C, oil pressure a little below 4 bar at 2400 rpm. Landed, CHT now dropping, oil inlet still 75C outlet 100C, approximately 10 00 rpm, oil pressure now below 1 bar. Ideas? Jon ------------------------------------------------------------------------------------- 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.