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Engine thru bolts and?

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Tim Juhl

Joined: 21 Mar 2006
Posts: 488
Location: "Thumb" of Michigan

Posted: Wed Mar 06, 2013 6:41 pm Post subject: Engine thru bolts and?

Has anyone replaced the engine thru bolts in a Jabiru 3300 A?  If so, how much trouble was it?



I have a 3300A still in the crate that I'm getting ready to hang in a month or so and would like to address some of the reliability issues beforehand.



Any other suggestions?



Thanks!



Tim

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_________________
______________
CFII
Champ L16A flying
Zodiac XL - Jabiru 3300A
Almost done! It'll fly in spring!

psm(at)att.net
Guest

Posted: Wed Mar 06, 2013 7:36 pm Post subject: Engine thru bolts and?

Hi Tim,



I have no help for you, but I wanted to say Hi anyway.



I did not replace any bolts on my Jabiru 3300 and after 40 hours it 

still runs just fine and hasn't fallen apart yet.



Have fun,



Paul

Camas, WA



On 3/6/2013 6:41 PM, Tim Juhl wrote:

 	  Quote: 	
		   



 Has anyone replaced the engine thru bolts in a Jabiru 3300 A?  If so, how much trouble was it?



 I have a 3300A still in the crate that I'm getting ready to hang in a month or so and would like to address some of the reliability issues beforehand.



 Any other suggestions?



 Thanks!



 Tim



 --------

 ______________

 CFII

 Champ L16A flying

 Zodiac XL - Jabiru 3300A

 Wing modifications done - back working on the fuselage





 Read this topic online here:



 http://forums.matronics.com/viewtopic.php?p=395788#395788

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Tim Juhl

Joined: 21 Mar 2006
Posts: 488
Location: "Thumb" of Michigan

Posted: Thu Mar 07, 2013 6:55 am Post subject: Re: Engine thru bolts and?

Paul,

Good to hear from you.  I hate to admit it, but life got in the way and I took almost a year off from building.  I'm back at it now, working every day, but haven't kept up with the latest scuttlebutt.



I've read of some issues developing with the Jabiru but am not surprised.... nothing like having a bunch out there being used and abused to show where the potential issues are.  I'm not going to panic but I am looking to see if there is anything I should do before I hang it to save myself hassle later on.



I suspect that a lot of the problems being reported are heat related, something I plan to monitor very closely and try to deal with during my flight testing.



Based upon your experience do you have any suggestions for me?



Tim

- The Matronics JabiruEngine-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

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_________________
______________
CFII
Champ L16A flying
Zodiac XL - Jabiru 3300A
Almost done! It'll fly in spring!

psm(at)att.net
Guest

Posted: Thu Mar 07, 2013 8:07 am Post subject: Engine thru bolts and?

Hi Tim,



As far as I know you are already on the right page.  I had lots of heat 

issues to resolve on my plane.  That dominated the first 10 hours of 

flight testing.  I never let the engine get too hot.  After using full 

power for takeoff and climb to 500 AGL I reduced power to keep CHTs 

below the max (using Dynon EMS).  Fortunately, the 3300 is a lot of 

engine for this little airplane and operating at low RPM is still plenty 

to maintain flight.  Now I use full throttle for any extended climb as 

recommended.  This makes a somewhat richer mixture than high cruise power.



I don't know for a fact, but I suspect many of the problems experienced 

by Jabiru owners are related to overheating the engine. Once you let it 

get too hot the aluminum starts to soften.



Good luck,



Paul



On 3/7/2013 6:55 AM, Tim Juhl wrote:

 	  Quote: 	
		   



 Paul,

 Good to hear from you.  I hate to admit it, but life got in the way and I took almost a year off from building.  I'm back at it now, working every day, but haven't kept up with the latest scuttlebutt.



 I've read of some issues developing with the Jabiru but am not surprised.... nothing like having a bunch out there being used and abused to show where the potential issues are.  I'm not going to panic but I am looking to see if there is anything I should do before I hang it to save myself hassle later on.



 I suspect that a lot of the problems being reported are heat related, something I plan to monitor very closely and try to deal with during my flight testing.



 Based upon your experience do you have any suggestions for me?



 Tim



 --------

 ______________

 CFII

 Champ L16A flying

 Zodiac XL - Jabiru 3300A

 Wing modifications done - back working on the fuselage





 Read this topic online here:



 http://forums.matronics.com/viewtopic.php?p=395813#395813

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Tim Juhl

Joined: 21 Mar 2006
Posts: 488
Location: "Thumb" of Michigan

Posted: Thu Mar 07, 2013 8:31 am Post subject: Re: Engine thru bolts and?

Paul,

The heat issue has plagued the Jabiru from the beginning.  When I attended classes at Shelbyville they spent some time discussing how to best deal with it.  I agree with you that careful engine management might pay big dividends.



The hottest running engine I've ever dealt with was the Continental O-470 in my 1975  C182.  To keep CHT's in line it was necessary to either open the cowl flaps, enrich the mixture, reduce power or increase airspeed (in climb).  Usually a combination of things.  The XL lacks cowl flaps and  adjustable mixture so you are pretty much left with the latter two and as you point out, the Jab has enough surplus power to make that feasible.  



I did finally get a chance to fly in an XL, thanks to Dr. Ed Moody in Rayne, LA.  We stopped in on the way home from visiting our kids in OK and TX over Xmas/New Year's 2011/2012.  The XL climbed out like a "Homesick Angel" and obviously had power to spare.



Thanks again!



Tim

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_________________
______________
CFII
Champ L16A flying
Zodiac XL - Jabiru 3300A
Almost done! It'll fly in spring!

DaveG601XL

Joined: 27 Oct 2006
Posts: 351
Location: Cincinnati, Oh

Posted: Fri Mar 15, 2013 5:28 am Post subject: Re: Engine thru bolts and?

Tim,



You can call Pete in Shelbyville and get his opinion.  I did last year and based on our conversation decided to just keep going with what I have for thru-bolts and nuts.  No problems in almost 250 hours and I check them every time I pop the cowl off.  My next condition inspection is due this month so I will get a look at them again soon.



Keep pressing forward!



Dave Gallagher

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David Gallagher
Cincinnati, OH area

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