---------------------------------------------------------- RotaxEngines-List Digest Archive --- Total Messages Posted Sun 02/23/20: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 01:07 AM - Re: 912 oil return line in silicon (Brian Davies) ________________________________ Message 1 _____________________________________ Time: 01:07:21 AM PST US From: "Brian Davies" Subject: RE: RotaxEngines-List: 912 oil return line in silicon Not all silicone hoses are the same spec. Standard silicone hose is porous to fuel and oil. If you want to use silicone hose in this application you need to specify Fluorosilicone Lined hose which is OK for oil and diesel.. If you really want full protection from fuels and oils you need to specify products such as Silflex Profuel. Regards Brian Davies From: owner-rotaxengines-list-server@matronics.com [mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of Richard Girard Sent: 22 February 2020 17:14 Subject: Re: RotaxEngines-List: 912 oil return line in silicon What is the manufacturer's recommendation? IF they say it's okay, you're good to go. I've only used the blue silicone hose on coolant lines and the stuff, though pricey, is amazing. After 15 years on a 582 install (with a lot of outside time) it's still as supple as new. Over time it pays off in replacement costs and time spent. For your application I would recommend you run fire sleeve over it though. Best of luck and safe flying, Rick On Fri, Feb 21, 2020 at 1:05 PM Robert Toth wrote: John I believe silicon is fine just watch the routing around the exhaust. I have them on my 912 Sent from my iPhone > On Feb 21, 2020, at 1:53 PM, JohnFrance <77alembert@gmail.com> wrote: > <77alembert@gmail.com> > > Hello, > I am replacing the hoses on my 912 and I am thinking of using silicon hose for the oil return line. This is probably the hose that is the most affected by heat as just above the exhaust system. It works in a low over pressure environment of around 0,35 bar yet I have never seen a silicon tube used on this line. On the other hand the oil pump feed line (used in an under pressure environment) is often made of silicon. > Is there a reason for not using a silicon return line as the rubber ones harden due to heat? > Regards, > John > > -------- > Europa mono Nr 192 > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=494929#494929 > > > > > > > > > br> fts!) r> > rel="noreferrer" target="_blank">http://www.matronics.com/contribution -Matt Dralle, List Admin. - xEngines-List" rel="noreferrer" target="_blank">http://www.matronics.com/Navigator?RotaxEngines-List FORUMS - eferrer" target="_blank">http://forums.matronics.com WIKI - errer" target="_blank">http://wiki.matronics.com b Site - -Matt Dralle, List Admin. rel="noreferrer" target="_blank">http://www.matronics.com/contribution -- =9CBlessed are the cracked, for they shall let in the light.=9D Groucho Marx Image removed by sender. Virus-free. www.avg.com ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message rotaxengines-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/RotaxEngines-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/rotaxengines-list Browse Digests http://www.matronics.com/digest/rotaxengines-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.