X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from smtp4.mail.ctc.net ([166.82.29.11] verified) by logan.com (CommuniGate Pro SMTP 5.0c1) with ESMTPS id 675771 for flyrotary@lancaironline.net; Sat, 20 Aug 2005 11:24:23 -0400 Received-SPF: none receiver=logan.com; client-ip=166.82.29.11; envelope-from=alpha@concordnc.com Received: from alphasys (65-162-57-245.quickclick.ctc.net [65.162.57.245]) by smtp4.mail.ctc.net (Switch-3.1.7/Switch-3.1.7) with SMTP id j7KFNUco018160 for ; Sat, 20 Aug 2005 11:23:32 -0400 (EDT) From: James Brewer To: Rotary motors in aircraft X-Mailer: PocoMail 3.01 (1661) - Licensed Version Date: Sat, 20 Aug 2005 11:23:28 -0400 Message-ID: <2005820112328.206478@alphasys> In-Reply-To: Subject: Re: [FlyRotary] Re: Rotary Diagnosis please Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable X-Antivirus: avast! (VPS 0533-5, 08/20/2005), Outbound message X-Antivirus-Status: Clean Ed, When you pinched the coolant o-ring how did you discover you had a problem? Did you get coolant into the chamber? Was it leaking before or after you started the engine? Why did you think it was the o-ring versus something= else? Did you mean you had all the pieces and then put the engine together in 30= min. putting the front cover on in the process? That is a great tip on lifting= the eccentric shaft......the wife didn't like getting all that oil on her hands.;-) I= may have to come take lessons to improve my speed as I have several other RX7s that= need rebuilds. Jim (rookie rebuilder) On Fri, 19 Aug 2005 23:29:51 -0400, Ed Anderson wrote: >=A0Actually, I have =A0put one back together in 30 minutes. =A0But, I did >=A0not have to take off the front cover and =A0I already had all the >=A0seals inplace and the engine back together. =A0When I took it out and >=A0put it on the plane and put coolant in it, it leaked. =A0Found I had >=A0one of the outer coolant "O" rings fall out and get pitched between >=A0rotor and side housing. =A0It took me 2 hours to get it off the >=A0aircraft and probably 20 minutes to take it apart. =A0It took >=A0another 30 minutes to put it back together after replacing the "O" >=A0ring. =A0Off with the flywheel nut, counterweigh bolts, tension bolts >=A0and it comes apart, just about that quickly. =A0The hardest thing I >=A0find to do working by myself is lift the e shaft and slip the >=A0center housing over the front lobe while hoping none of the coolant >=A0O rings drop down from it. =A0I find what worked best for me is a 2x4 >=A0under the pulley end of the E shaft and that 2x4 sitting on the end >=A0of another one with a block under it. =A0I step on the one using it >=A0as a lever and that pushes the e shaft up far enough to complete >=A0the job. > >=A0Yes, Jim, =A0it does get faster the more times you do it. =A0Just hope >=A0you remain slow {:>) > >=A0Ed > > >=A0----- Original Message ----- >=A0From: "James Brewer" >=A0To: "Rotary motors in aircraft" =A0Sent: >=A0Friday, August 19, 2005 9:58 PM Subject: [FlyRotary] Re: Rotary >=A0Diagnosis please > > >=A0Thanks, Kelly. =A0I have a manual and I measured the oil seals but I >=A0may have missed measuring the height. =A0These rotary engines are >=A0simple with subtle complexities. =A0I think Ed said he could build on >=A0in 30 minutes, of course he's >=A0had experience.;-) =A0Maybe after I've rebuilt this one several times >=A0I'll get it right. :-( > >=A0Jim > > >=A0On Sat, 20 Aug 2005 01:47:37 +0000, Kelly Troyer wrote: >>=A0Jim, >>=A0My Mazda factory manual says the oil seals should be .220 to .228 >>=A0in height, the width limit of the oil seal lip (shiney part) is >>=A0.020 and the protrusion limit (installed in the grooves) should >>=A0be .020 minimum..........Get a manual if you do not have one >>=A0already.........It will have all the engine tech data and will >>=A0help you make heads or tails of what I just stated.........These >>=A0little metal seals keep oil out of the engine and are very >>=A0critical..........FWIW -- Kelly Troyer Dyke Delta/13B/RD1C/EC2 >> >> >>=A0-------------- Original message from James Brewer >>=A0: -------------- >> >> >>>=A0Yes, I replace the oil seal o-rings. Yeah, it was smoking when >>>=A0I got it. Very low >>>=A0compression on one rotor. Replaced parts with Tracy's overhaul >>>=A0kit. Bearings in rotors were not >>>=A0replace but looked ok and measured fine. New apex seals and >>>=A0side seals. I didn't replace the metal oil rings on the rotors >>>=A0as they looked fine. How critical are these anyway and what are >>>=A0the symptoms of failure/damage? >>> >>>=A0Jim >>> >>> >>>=A0On Fri, 19 Aug 2005 20:49:27 +0000, Kelly Troyer wrote: >>> >>>>=A0Jim, >>>>=A0You did replace the rotor oil seal O-rings I presume ?? Was >>>>=A0it smoking like that before overhaul ?? -- Kelly Troyer Dyke >>>>=A0Delta/13B/RD1C/EC2 >>>> >>>> >>>>=A0-------------- Original message from James Brewer >>>>=A0: -------------- >>>> >>>> >>>>>=A0Guys, >>>>>=A0I need some help on my recent 13B rebuild for my '87 RX7. >>>>>=A0Thanks to all previous replies on the crank angle >>>>>=A0sensor/TDC settings I was able to get it to crank and run. >>>>>=A0Now for the diagnosis of my present problem: Engine starts >>>>>=A0and idles with a slight >>>>>=A0amount of smoking. As the engine warms up and I increase >>>>>=A0the RPM I get a considerable amount of smoke. The smoke >>>>>=A0does not smell "sweet" like it is burning coolant but maybe >>>>>=A0it smells different in a rotary. Smoke is white not black. >>>>>=A0With limited running >>>>>=A0I haven't noticed a drop in the coolant or coolant in the >>>>>=A0oil. Before I pull the engine and go thru it again I would >>>>>=A0like to pinpoint the >>>>> >>>>=A0t;>=A0problem before teardown. I thought I was careful about >>>>=A0the o- >>>> >>>>>=A0rings. I used Hylomar for the grooves as per Bruce >>>>>=A0Turrentine's tape to keep them in the grooves. Am I getting >>>>>=A0oil past the oil o- >>>>>=A0rings? Other sources or causes for my smoke? Tests I need >>>>>=A0to run? Help! Ed, Lynn, Leon or others. >>>>> >>>>> >>>>>=A0Jim Brewer >>>>>=A0Albemarle, NC >>>>> >>>>> >>>>>=A0-- >>>>>=A0Homepage: http://www.flyrotary.com/ >>>>>=A0Archive and UnSub: >>>>>=A0http://mail.lancaironline.net/lists/flyrotary/ >>> >>> >>>=A0-- >>>=A0Homepage: http://www.flyrotary.com/ >>>=A0Archive and UnSub: >>>=A0http://mail.lancaironline.net/lists/flyrotary/ > > >=A0-- >=A0Homepage: =A0http://www.flyrotary.com/ >=A0Archive and UnSub: =A0 http://mail.lancaironline.net/lists/flyrotary/ > > >=A0-- >=A0Homepage: =A0http://www.flyrotary.com/ >=A0Archive and UnSub: =A0 http://mail.lancaironline.net/lists/flyrotary/