---------------------------------------------------------- RV-List Digest Archive --- Total Messages Posted Thu 12/21/06: 8 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 07:09 AM - Re: Oil return hoses? (glen matejcek) 2. 07:58 AM - Re: safety wiring AN fitting nuts (=?iso-8859-1?Q?Mich=E8le_Delsol?=) 3. 08:29 AM - Re: safety wiring AN fitting nuts (Ed Anderson) 4. 03:43 PM - Re: Oil Return Hoses (joelrhaynes@aol.com) 5. 06:19 PM - Re: Re: Continuation on High CHT problem (dick martin) 6. 06:28 PM - Re: Re: Continuation on High CHT problem (dick martin) 7. 06:49 PM - Re: Re: Continuation on High CHT problem (Walter Tondu) 8. 07:06 PM - Re: Re: Continuation on High CHT problem (Bob J.) ________________________________ Message 1 _____________________________________ Time: 07:09:12 AM PST US From: "glen matejcek" Subject: RV-List: Re: Oil return hoses? Has anyone used some EZ-Turn (fuel lube) in this application? Seems like a natural- glen matejcek aerobubba@earthlink.net ________________________________ Message 2 _____________________________________ Time: 07:58:31 AM PST US From: =?iso-8859-1?Q?Mich=E8le_Delsol?= Subject: RE: RV-List: safety wiring AN fitting nuts On the same score, if you torque down a nut or bolt, put some paint on it immediately. Any bolt/nut not marked as having been torqued down should be torqued down. So, when you inspect your work you should not have to ask yourself, did I torque this bolt down or not. Sounds elementary, but it is one of those little things which can make a lot of difference. Mich=E8le RV8 - Finishing _____ From: owner-rv-list-server@matronics.com [mailto:owner-rv-list-server@matronics.com] On Behalf Of Hopperdhh@aol.com Sent: mardi 19 d=E9cembre 2006 21:14 Subject: Re: RV-List: safety wiring AN fitting nuts I'd be interested in knowing if anyone found their fuel fittings loose while complying with their "Mandatory Service Bulletin." Mine were tight just like I left them. Now, I could understand if someone left theirs loose, they may find them that way! I learned a lesson some time ago -- almost the hard way. Never leave a hose fitting finger tight. If you are not ready to tighten it, leave it completely disconnected. Dan Hopper RV-7A ________________________________ Message 3 _____________________________________ Time: 08:29:21 AM PST US From: "Ed Anderson" Subject: Re: RV-List: safety wiring AN fitting nuts Having had the AN nut on my "Flop tube" in the right tank come loose after 160 hours of flying with the resulting disconnect of the tube - which meant the last 3 1/2 gallons of fuel were not assessable - I agree. Don't put a hose/tube on a fitting unless you are going to tighten it to specs at that time - otherwise leave it off. I don't know - but I strongly suspect that my fitting was only on "finger tight" and eventually worked loose. Ed Ed Anderson Rv-6A N494BW Rotary Powered Matthews, NC eanderson@carolina.rr.com http://members.cox.net/rogersda/rotary/configs.htm#N494BW http://www.dmack.net/mazda/index.html ----- Original Message ----- From: Mich=E8le Delsol To: rv-list@matronics.com Sent: Thursday, December 21, 2006 10:59 AM Subject: RE: RV-List: safety wiring AN fitting nuts On the same score, if you torque down a nut or bolt, put some paint on it immediately. Any bolt/nut not marked as having been torqued down should be torqued down. So, when you inspect your work you should not have to ask yourself, did I torque this bolt down or not. Sounds elementary, but it is one of those little things which can make a lot of difference. Mich=E8le RV8 - Finishing ------------------------------------------------------------------------- ----- From: owner-rv-list-server@matronics.com [mailto:owner-rv-list-server@matronics.com] On Behalf Of Hopperdhh@aol.com Sent: mardi 19 d=E9cembre 2006 21:14 To: rv-list@matronics.com Subject: Re: RV-List: safety wiring AN fitting nuts I'd be interested in knowing if anyone found their fuel fittings loose while complying with their "Mandatory Service Bulletin." Mine were tight just like I left them. Now, I could understand if someone left theirs loose, they may find them that way! I learned a lesson some time ago -- almost the hard way. Never leave a hose fitting finger tight. If you are not ready to tighten it, leave it completely disconnected. Dan Hopper RV-7A www.aeroelectric.comwww.kitlog.comhttp://www.matronics.com/Navigator?RV-L ist ________________________________ Message 4 _____________________________________ Time: 03:43:19 PM PST US Subject: RV-List: Re: Oil Return Hoses From: joelrhaynes@aol.com I agree with Gary. I think the secret is to completely clean the hose and tube where it attaches of any oil. I had a persistent little leak and when I cleaned the parts well and roughed up the aluminum tube slightly with scotchbrite my problem was solved. No RTV was required in my case. No more leaks after 65 hours. Joel Haynes RV-7A N557XW 65 hours Bozeman Time: 09:42:48 PM PST US From: "RV6 Flyer" Subject: Re: RV-List: Oil Return Hoses Leaks at the drain hose is a common problem. The way I fix it is to clean the hose and fittings very well. Now add a very small film of RTV engine gasket compound. Reassemble and snug the clamp. I had leaks up to about 10 hours. Used my little trick and no more drain hose leaks. Gary A. Sobek "My Sanity" RV-6 N157GS O-320 Hartzell, 1,972 + Flying Hours So. CA, USA ----Original Message Follows---- >My engine continues to have minor leaks around the little rubber hose >segments which connect the cylinder head oil return lines to the sump. I've >made several efforts to tighten the hose connectors but those efforts don't >seem to have helped. I plan on replacing the hose segments at the next >condition inspection. >My question is: "How do I prevent/eliminate/minimize these leaks with the >next set of hoses?" > Thanks in advance, > KB _________________________________________________________________ Get free, personalized online radio with MSN Radio powered by Pandora http://radio.msn.com/?icid=T002MSN03A07001 ________________________________________________________________________ ________________________________ Message 5 _____________________________________ Time: 06:19:20 PM PST US From: "dick martin" Subject: Re: RV-List: RE: Continuation on High CHT problem Glen, I also do not think that this is correct. I have 1400 hrs on my RV8. No gap, no cooling problem I have always been taught that loose and poorly fit baffles were the primary cause of cooling problems. Dick Martin RV8 N233M the fast one ----- Original Message ----- From: Hopperdhh@aol.com To: rv-list@matronics.com Sent: Monday, December 11, 2006 10:02 AM Subject: Re: RV-List: RE: Continuation on High CHT problem In a message dated 12/11/2006 10:32:18 AM Eastern Standard Time, aerobubba@earthlink.net writes: Hi Tim- >I reported on these earlier and received lots of great info and >solutions. I haven't noticed anyone referencing ensuring that you have adequate clearance between the baffles and the edges of the fins. I've not had the opportunity to fly yet, so I've not tinkered with this yet, but IIRC you need a bit of a gap between the fins and the baffles. glen matejcek aerobubba@earthlink.net I don't think this is correct, Glen. Dan Hopper RV-7A 200 HP Angle Valve IO-360, No gap and no cooling problem. ________________________________ Message 6 _____________________________________ Time: 06:28:38 PM PST US From: "dick martin" Subject: Re: RV-List: RE: Continuation on High CHT problem Tim, to add to Dan's comments, on the IO390s most of the air racers are using a spacing on the baffles that wrap around the botton side of the cylinder of 2 1/4" on the cylinder head portion and 1" on the cylinder barrel portion. Some engine installations will require minor tweaking of adding or subtracting a quarter inch to these demensions. Good luck. Dick Martin RV8 N233M the fast one ----- Original Message ----- From: Hopperdhh@aol.com To: rv-list@matronics.com Sent: Monday, December 11, 2006 10:14 AM Subject: Re: RV-List: RE: Continuation on High CHT problem Tim, You do, of course, need adequate space for the cooling air to escape at the bottom of each cylinder. I think I have about 2 or 2 1/2 inches. Also, you should have an inter-cylinder baffle between each pair of cylinders. You do have these, don't you? Dan Hopper RV-7A In a message dated 12/11/2006 11:07:37 AM Eastern Standard Time, Hopperdhh@aol.com writes: In a message dated 12/11/2006 10:32:18 AM Eastern Standard Time, aerobubba@earthlink.net writes: Hi Tim- >I reported on these earlier and received lots of great info and >solutions. I haven't noticed anyone referencing ensuring that you have adequate clearance between the baffles and the edges of the fins. I've not had the opportunity to fly yet, so I've not tinkered with this yet, but IIRC you need a bit of a gap between the fins and the baffles. glen matejcek aerobubba@earthlink.net I don't think this is correct, Glen. Dan Hopper RV-7A 200 HP Angle Valve IO-360, No gap and no cooling problem. p://www.aeroelectric.com/">http://www.aeroelectric.com/ href="http://www.buildersbooks.com/">http://www.buildersbooks.com/ ttp://www.kitlog.com/">http://www.kitlog.com/ ttp://www.homebuilthelp.com/">http://www.homebuilthelp.com/ ://www.matronics.com/contribution">http://www.matronics.com/contribution ="http://www.matronics.com/Navigator?RV-List">http://www.matronics.com/ Navigator?RV-List ________________________________ Message 7 _____________________________________ Time: 06:49:46 PM PST US From: Walter Tondu Subject: Re: RV-List: RE: Continuation on High CHT problem On 12/21 8:07, dick martin wrote: > I haven't noticed anyone referencing ensuring that you have adequate > clearance between the baffles and the edges of the fins. I've not had > the Are you perhaps mentioning the gap between the #3 cylinder and the rear baffle? If so, I did see a decent drop (30F) when I placed a 1/8th gap there. -- Walter Tondu http://www.rv7-a.com - Flying! http://www.evorocket.com - Building ________________________________ Message 8 _____________________________________ Time: 07:06:02 PM PST US From: "Bob J." Subject: Re: RV-List: RE: Continuation on High CHT problem It is correct, I know of at least a half dozen RV's or Rockets belonging to friends that have spaced the baffle away from the #3 cylinders with washers (#5 on the 540). It will drop the CHT's on those cylinders by 30 degrees, if for some reason those cylinders are running hot. It also works on the #1 cylinder as well. The theory is it allows more cooling air to flow around the hottest side of the cylinder which is the exhaust valve side.. Regards, Bob Japundza RV-6 flying F1 under const. On 12/21/06, dick martin wrote: > > Glen, > I also do not think that this is correct. > I have 1400 hrs on my RV8. No gap, no cooling problem > I have always been taught that loose and poorly fit baffles were the > primary cause of cooling problems. > Dick Martin > RV8 N233M > the fast one > > ----- Original Message ----- > *From:* Hopperdhh@aol.com > *To:* rv-list@matronics.com > *Sent:* Monday, December 11, 2006 10:02 AM > *Subject:* Re: RV-List: RE: Continuation on High CHT problem > > In a message dated 12/11/2006 10:32:18 AM Eastern Standard Time, > aerobubba@earthlink.net writes: > > > Hi Tim- > > >I reported on these earlier and received lots of great info and > >solutions. > > I haven't noticed anyone referencing ensuring that you have adequate > clearance between the baffles and the edges of the fins. I've not had the > opportunity to fly yet, so I've not tinkered with this yet, but IIRC you > need a bit of a gap between the fins and the baffles. > > > glen matejcek > aerobubba@earthlink.net > > I don't think this is correct, Glen. > > Dan Hopper > RV-7A 200 HP Angle Valve IO-360, No gap and no cooling problem. > > * > > href="http://www.aeroelectric.com">www.aeroelectric.com > href="http://www.buildersbooks.com">www.buildersbooks.com > href="http://www.kitlog.com">www.kitlog.com > href="http://www.homebuilthelp.com">www.homebuilthelp.com > href="http://www.matronics.com/contribution">http://www.matronics.com/chref="http://www.matronics.com/Navigator?RV-List">http://www.matronics.com/Navigator?RV-List > * > > * > > > * > > ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message rv-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/RV-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/rv-list Browse Digests http://www.matronics.com/digest/rv-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.