Matronics Email Lists :: View topic

Matronics Email Lists
Web Forum Interface to the Matronics Email Lists

Get Email Distribution Too! FAQ Search Memberlist Usergroups Register

Profile Log in to check your private messages Log in

engine burping

Matronics Email Lists Forum Index -> RotaxEngines-List

View previous topic :: View next topic

Author Message

m.tucciarone(at)hotmail.c
Guest

Posted: Mon Dec 27, 2010 6:21 am Post subject: engine burping

I had a guy tell me that his mechanic said  that after he flies his plane, he should run the prop through and burp the  engine again just like before flight. He said if you donâ€™t do it, oil will  collect in the cylinders. Has anyone been told to do this? On my plane my oil  tank is above the engine. One time, after not flying the plane for about 2  weeks, I took out a spark plug at the lowest point on the engine. Some oil  dripped out. I had not run the prop through first like I would if I was going to  start it. Is any of this a problem? The mechanic said it is not good for the oil  to be there but I didnâ€™t think it was a problem if you run the prop through to  burping before start.

  

 Any thoughts?

  

 

 





   [quote][b]

lucien

Joined: 03 Jun 2007
Posts: 721
Location: santa fe, NM

Posted: Mon Dec 27, 2010 8:23 am Post subject: Re: engine burping

 	  m.tucciarone(at)hotmail.c wrote: 	
		  I had a guy tell me that his mechanic said  that after he flies his plane, he should run the prop through and burp the  engine again just like before flight. He said if you donâ€™t do it, oil will  collect in the cylinders. Has anyone been told to do this? On my plane my oil  tank is above the engine. One time, after not flying the plane for about 2  weeks, I took out a spark plug at the lowest point on the engine. Some oil  dripped out. I had not run the prop through first like I would if I was going to  start it. Is any of this a problem? The mechanic said it is not good for the oil  to be there but I didnâ€™t think it was a problem if you run the prop through to  burping before start.

	


 

Usually I don't think enough oil collects in the crankcase for this to happen, but I guess that could depend on the installation. If it does, I don't see why not to burp it after the flight. 



Is your oil return line in the hole at the lowest point? I.e. if cyls 1-2 are low when the plane is at rest, the oil return line banjo fitting should be in the 

hole in the crankcase nearest the gearbox....



But yeah this is familar with any flat four. My VW's would sometimes collect oil in the cylinders if I parked em on the side of a hill....



LS

_________________
LS
Titan II SS

m.tucciarone(at)hotmail.c
Guest

Posted: Mon Dec 27, 2010 11:25 am Post subject: engine burping

ï»¿Yes,

But is it bad if some oil collects there? As I said, I always burp the 

engine before start.



--

Roger Lee

Joined: 10 Jan 2006
Posts: 1464
Location: Tucson, Az.

Posted: Mon Dec 27, 2010 11:46 am Post subject: Re: engine burping

Never ever heard of burping the engine after a flight. Doesn't make any sense.

_________________
Roger Lee
Tucson, Az.
Rotax Instructor & Rotax IRC
Light Sport Repairman
Home 520-574-1080 TRY HOME FIRST
Cell 520-349-7056

m.tucciarone(at)hotmail.c
Guest

Posted: Mon Dec 27, 2010 11:59 am Post subject: engine burping

?That is exactly what I thought. I was just wondering if anyone else has 

heard of this. I try to keep up with procedures. I have been flying this 

912s for about 8 years now and never heard that.

--

rickofudall

Joined: 19 Sep 2009
Posts: 1392
Location: Udall, KS, USA

Posted: Mon Dec 27, 2010 12:04 pm Post subject: engine burping

Is the person making this recommendation an A & P by chance? As Roger said,

it doesn't make any sense. The engine has its own motion to "burp" the

engine while it was running. If it were to collect oil in the crankcase that

quickly after shut down, I'd be suspicious of the condition of the engine or

its installation.

While it's remote, their is one thing that might make burping a hot engine

dangerous. If there were a hot spark plug, i.e. acting like a glow plug, or

a bit of carbon doing the same, the engine could kick back. Like I said the

chances are remote, but they aren't zero.



Rick Girard



On Mon, Dec 27, 2010 at 1:23 PM, Matt Tucciarone

<m.tucciarone(at)hotmail.com>wrote:



[quote] 

 m.tucciarone(at)hotmail.com>



 ï»¿Yes,

 But is it bad if some oil collects there? As I said, I always burp the

 engine before start.



 --

_________________
The smallest miracle right in front of you is enough to make you happy....

rparigoris

Joined: 24 Nov 2009
Posts: 797

Posted: Mon Dec 27, 2010 12:56 pm Post subject: Re: engine burping

I have heard of folks checking their oil after flight and if OK and as long as they don't see a big puddle under the plane they go flying without checking the oil.



Is it possible that's what was meant?



Ron Parigoris

ronlee

Joined: 25 Dec 2006
Posts: 141

Posted: Mon Dec 27, 2010 6:01 pm Post subject: Re: engine burping

I can understand burping the engine say ten minuets after shut down. During this time the engine cools and the air in the engine shrinks causing a slight vacuum that can suck oil back into the crankcase. I believe the only reason a person would do that is to get an accurate oil level check.

_________________
Ron Lee
Tucson, Arizona

Dick Maddux

Joined: 24 Jun 2008
Posts: 516
Location: Milton, Fl

Posted: Tue Dec 28, 2010 5:24 am Post subject: engine burping

Matt,

  You don't need to burp your engine right after you have run it as the  engine has already done that BUT if you have a high oil tank as I do, on my  Kitfox, the oil will migrate out of the tank back down into the engine over  time. You can slow it down a bit by waiting for the engine to cool and the  oil to thicken a bit then burp the engine, I usually do this when I am  working on other projects in my hanger and do it later in the day. Then instead  of a couple of days before the oil level sinks below the min on the  dipstick it might take 4 days (as an example)

  This procedure just decreases the number of revolutions you have to  give the prop when you first burp the engine because you have less oil to pump  back into the oil tank.(but really...whoopdedoo!)

                                                               Dick Maddux

                                                               912UL

                                                               Milton,Fl

 [quote][b]

m.tucciarone(at)hotmail.c
Guest

Posted: Tue Dec 28, 2010 5:40 am Post subject: engine burping

Thanks Dick,

 I agree with you. The mechanic said that the oil that would get back in the  cylinders would be bad for the engine. I disagree and it looks like from the  response to my post that you and others disagree also.

  

 Thanks to everyone for their input on this.

  

 Matt

  

    

  From: Catz631(at)aol.com (Catz631(at)aol.com) 

 Sent: Tuesday, December 28, 2010 8:19 AM

 To: rotaxengines-list(at)matronics.com (rotaxengines-list(at)matronics.com)  

 Subject: Re: engine burping

  



  Matt,

 You don't need to burp your engine right after you have run it as the  engine has already done that BUT if you have a high oil tank as I do, on my  Kitfox, the oil will migrate out of the tank back down into the engine over  time. You can slow it down a bit by waiting for the engine to cool and the oil  to thicken a bit then burp the engine, I usually do this when I am working on  other projects in my hanger and do it later in the day. Then instead of a couple  of days before the oil level sinks below the min on the dipstick it might take 4  days (as an example)

 This procedure just decreases the number of revolutions you have to give  the prop when you first burp the engine because you have less oil to pump back  into the oil tank.(but really...whoopdedoo!)

                                                               Dick Maddux

                                                               912UL

                                                               Milton,Fl

[quote]



href="http://www.aeroelectric.com">www.aeroelectric.com

href="http://www.buildersbooks.com">www.buildersbooks.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?RotaxEngines-List">http://www.matronics.com/Navigator?RotaxEngines-List

href="http://forums.matronics.com">http://forums.matronics.com

[b]

Display posts from previous:

	Matronics Email Lists Forum Index -> RotaxEngines-List	All times are GMT - 8 Hours
Page 1 of 1

Jump to:

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum