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JabiruEngine-List Digest: 2 Msgs - 02/28/10

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gordona23(at)earthlink.ne
Guest

Posted: Mon Mar 01, 2010 6:59 am Post subject: JabiruEngine-List Digest: 2 Msgs - 02/28/10

Michael;



  Keep the engine from turning by finding the cylinder that is near TDC 

on its compression stroke and feed some 1/4 inch nylon rope into the 

spark plug hole.  Make sure the piston is moving up as the engine 

rotates when you try to loosen the bolt, before inserting the rope.  Put 

in as much rope as will fit.  Then slowly rotate the stuck bolt until 

the engine locks up.



  Now, get a hand impact tool and use it to remove the bolt.  



  Rotate the engine in the opposite direction and remove the rope.



 Then get a good light and figure out what happened.  Please let us know 

how you make out.





JabiruEngine-List Digest Server wrote:

 	  Quote: 	
		   *



  ==================================================

    Online Versions of Today's List Digest Archive

  ==================================================



 Today's complete JabiruEngine-List Digest can also be found in either of the 

 two Web Links listed below.  The .html file includes the Digest formatted 

 in HTML for viewing with a web browser and features Hyperlinked Indexes 

 and Message Navigation.  The .txt file includes the plain ASCII version 

 of the JabiruEngine-List Digest and can be viewed with a generic text editor 

 such as Notepad or with a web browser. 



 HTML Version:



     http://www.matronics.com/digest/digestview.php?Style=82701&View=html&Chapter 10-02-28&Archive=JabiruEngine



 Text Version:



     http://www.matronics.com/digest/digestview.php?Style=82701&View=txt&Chapter 10-02-28&Archive=JabiruEngine

  ================================================

    EMail Version of Today's List Digest Archive

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            ----------------------------------------------------------

                            JabiruEngine-List Digest Archive

                                       ---

                      Total Messages Posted Sun 02/28/10: 2

            ----------------------------------------------------------

  

  

 Today's Message Index:

 ----------------------

  

      1. 07:54 PM - Engine Weight Comparison - Jabiru 3300 To Rotax 912 ULS  (david van lanen)

      2. 09:32 PM - STUCK PROP FLANGE BOLT- HELP ME PLEASE  (MHerder)

  

  

  

 ________________________________  Message 1  _____________________________________

 Time: 07:54:28 PM PST US

 From: "david van lanen" <davevanlanen(at)sbcglobal.net>

 Subject: Engine Weight Comparison - Jabiru 3300 To Rotax 912

 ULS



 Has anyone compared the installed "wet" weight of a Jabiru 3300 to a Rotax

 912 ULS, and if so, can you give me an approximate weight difference?  



 Thanks,

 Dave Van Lanen

 Madison, WI 



 ________________________________  Message 2  _____________________________________

 Time: 09:32:51 PM PST US

 Subject: STUCK PROP FLANGE BOLT- HELP ME PLEASE

 From: "MHerder" <michaelherder(at)beckgroup.com>

 Guys I'm having a really crappy night.

 This evening I decided to prepare for the final installation of my 2.5" prop hub

 extension on my 3300.  In strict accordance with the service bulletins I heated

 the flange and bolts while protecting the rubber seals with a wet rag and

 I safely removed all six bolts.  SUCCESS... I thought.

 I thouroghly  removed all of the loctite with a dental pick, then acetone on the

 female side.  I then used a steel brush and cleaned the female threads.  I then

 cleaned the bolts with a wire brush on a wheel. Acetone 3 or four more times,

 cleaning very  thuroghtly, making sure not to get oils from my hands on the

 bolts.  Cleaning, blowing with compressed air, acetone repeat... Maybe even

 too many times, but I was determined to not screw this up!!!.



 As a final check I  decided to make sure that all was well and hand screwed the

 bolt in to make sure that it went in smoothly.  I used the same bolt on three

 holes and it went in pretty dang smooth.  The third one was nearly all the way

 in (about 1/8" less than all the way in (simulating prop flange thickness))

 and then it got stuck!!  I thought surely it can't really be stuck, I'm not cross

 threaded and it went in smooth.  So I got out my wrench to back it out.  Now

 it's stuck enough that it turns over the engine and I don't have the prop flange

 on so it's tricky to keep the engine from turning over.  



 I only have two theories as to how this could have happened.



 1)  A little bit of steel from my brush has lodged itself in between the threads???



 2)  The cleaning action of my steel brush rounded off the threads a bit  and is

 causing an extremely tight fit?



 3)  The loctite 620 that I thought was completely cleaned off was actually still

 there in a residual form and the acetone that I thought was dry was still a

 little wet and reactivated the 620??  This one is a long shot.  As I really cleaned

 these puppies.



 I need help and worst case scenarios here.  I am going to have nightmares about

 having to replace a crankshaft on account of this.  



 What would a good machinist do to get this thing out?



 --------

 One Rivet at a Time!

 Read this topic online here:



 http://forums.matronics.com/viewtopic.php?p=288699#288699

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bw12345(at)sbcglobal.net
Guest

Posted: Mon Mar 01, 2010 7:36 am Post subject: JabiruEngine-List Digest: 2 Msgs - 02/28/10

Any one think of starting off by using a good penetrating oil? BOB



--- On Mon, 3/1/10, Gordon Arbeitman <gordona23(at)earthlink.net> wrote:

  	  Quote: 	
		  

From: Gordon Arbeitman <gordona23(at)earthlink.net>

Subject: Re: JabiruEngine-List Digest: 2 Msgs - 02/28/10

To: jabiruengine-list(at)matronics.com

Date: Monday, March 1, 2010, 9:22 AM



 --> JabiruEngine-List message posted by: Gordon Arbeitman <gordona23(at)earthlink.net (gordona23(at)earthlink.net)>



Michael;



Keep the engine from turning by finding the cylinder that is near TDC on its compression stroke and feed some 1/4 inch nylon rope into the spark plug hole.  Make sure the piston is moving up as the engine rotates when you try to loosen the bolt, before inserting the rope.  Put in as much rope as will fit.  Then slowly rotate the stuck bolt until the engine locks up.



Now, get a hand impact tool and use it to remove the bolt.  

Rotate the engine in the opposite direction and remove the rope.



Then get a good light and figure out what happened.  Please let us know how you make out.





JabiruEngine-List Digest Server wrote:

 	  Quote: 	
		   *

  

  =========================

    Online Versions of Today's List Digest Archive

  =========================

 

 Today's complete JabiruEngine-List Digest can also be found in either of the two Web Links listed below.  The .html file includes the Digest formatted in HTML for viewing with a web browser and features Hyperlinked Indexes and Message Navigation.  The .txt file includes the plain ASCII version of the JabiruEngine-List Digest and can be viewed with a generic text editor such as Notepad or with a web browser. 

 HTML Version:

 

     http://www.matronics.com/digest/digestview.php?Style=82701&View=html&Chapter=2010-02-28&Archive=JabiruEngine

 

 Text Version:

 

     http://www.matronics.com/digest/digestview.php?Style=82701&View=txt&Chapter=2010-02-28&Archive=JabiruEngine

 

 

  =======================

    EMail Version of Today's List Digest Archive

  =======================

 

             ----------------------------------------------------------

                            JabiruEngine-List Digest  Archive

                                       ---

                      Total Messages Posted Sun 02/28/10: 2

            ----------------------------------------------------------

   Today's Message Index:

 ----------------------

       1. 07:54 PM - Engine Weight Comparison - Jabiru 3300 To Rotax 912 ULS  (david van lanen)

      2. 09:32 PM - STUCK PROP FLANGE BOLT- HELP ME PLEASE  (MHerder)

    ________________________________  Message 1  _____________________________________

 

 

 Time: 07:54:28 PM PST US

 From: "david van lanen" <davevanlanen(at)sbcglobal.net (davevanlanen(at)sbcglobal.net)>

 Subject: Engine Weight Comparison - Jabiru 3300 To Rotax 912

 ULS

 

 Has anyone compared the installed "wet" weight of a Jabiru 3300 to a Rotax

 912 ULS, and if so, can you give me an approximate weight difference?  

 Thanks,

 Dave Van Lanen

 Madison, WI 

 ________________________________  Message 2  _____________________________________

 

 

 Time: 09:32:51 PM PST US

 Subject: JabiruEngine-List: STUCK PROP FLANGE BOLT- HELP ME PLEASE

 From: "MHerder" <michaelherder(at)beckgroup.com (michaelherder(at)beckgroup.com)>

 

 

 Guys I'm having a really  crappy night.

 

 

 This evening I decided to prepare for the final installation of my 2.5" prop hub

 extension on my 3300.  In strict accordance with the service bulletins I heated

 the flange and bolts while protecting the rubber seals with a wet rag and

 I safely removed all six bolts.  SUCCESS... I thought.

 

 

 I thouroghly  removed all of the loctite with a dental pick, then acetone on the

 female side.  I then used a steel brush and cleaned the female threads.  I then

 cleaned the bolts with a wire brush on a wheel. Acetone 3 or four more times,

 cleaning very  thuroghtly, making sure not to get oils from my hands on the

 bolts.  Cleaning, blowing with compressed air, acetone repeat.. Maybe even

 too many times, but I was determined to not screw this up!!!.

 

 As a final check I  decided to make  sure that all was well and hand screwed the

 bolt in to make sure that it went in smoothly.  I used the same bolt on three

 holes and it went in pretty dang smooth.  The third one was nearly all the way

 in (about 1/8" less than all the way in (simulating prop flange thickness))

 and then it got stuck!!  I thought surely it can't really be stuck, I'm not cross

 threaded and it went in smooth.  So I got out my wrench to back it out.  Now

 it's stuck enough that it turns over the engine and I don't have the prop flange

 on so it's tricky to keep the engine from turning over.  

 I only have two theories as to how this could have happened.

 

 1)  A little bit of steel from my brush has lodged itself in between the threads???

 

 2)  The cleaning action of my steel brush rounded off the threads a bit  and is

 causing an  extremely tight fit?

 

 3)  The loctite 620 that I thought was completely cleaned off was actually still

 there in a residual form and the acetone that I thought was dry was still a

 little wet and reactivated the 620??  This one is a long shot.  As I really cleaned

 these puppies.

 

 I need help and worst case scenarios here.  I am going to have nightmares about

 having to replace a crankshaft on account of this.  

 What would a good machinist do to get this thing out?

 

 --------

 One Rivet at a Time!

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=288699#288699

 

 

  

 

   

 

 =          - The JabiruEngine-List Email Forum -nics.com/Navigator?JabiruEngine-List" target=_blank>http://www.matronics.rums.matronics.com/" ;               -Matt Dralle, List Admin==========


	




	
 [quote][b]

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Lynn Matteson

Joined: 10 Jan 2006
Posts: 2778
Location: Grass Lake, Michigan

Posted: Mon Mar 01, 2010 7:39 am Post subject: JabiruEngine-List Digest: 2 Msgs - 02/28/10

Good idea...I'd forgotten about the rope trick. (getting old is hell!)

One addition to the rope trick...it would be best to make sure that  

you're on the compression stroke, so as to not be pushing the rope  

against the edge of an open valve. I don't know how much those puny  

valves can take. This might be a case of over-thinking, but better  

safe than sorry.



And I would NOT use an impact, as I'd want to be able to feel how  

that bolt is progressing outward, and be able to stop it before it  

got the crank all gouged out.



Lynn Matteson

Kitfox IV Speedster, taildragger

Jabiru 2200, #2062, 860.4 hrs (since 3-27-2006)

Countdown to 1000 hrs~140 to go(145 days to go)

Sensenich 62"x46" Wood (summer)

Sensenich 55.5" x 46" Wood (winter)

Electroair direct-fire ignition system

Rotec TBI-40 injection

Status: flying (and learning)

On Mar 1, 2010, at 9:22 AM, Gordon Arbeitman wrote:



 	  Quote: 	
		   

 <gordona23(at)earthlink.net>



 Michael;



  Keep the engine from turning by finding the cylinder that is near  

 TDC on its compression stroke and feed some 1/4 inch nylon rope  

 into the spark plug hole.  Make sure the piston is moving up as the  

 engine rotates when you try to loosen the bolt, before inserting  

 the rope.  Put in as much rope as will fit.  Then slowly rotate the  

 stuck bolt until the engine locks up.



  Now, get a hand impact tool and use it to remove the bolt.

  Rotate the engine in the opposite direction and remove the rope.



 Then get a good light and figure out what happened.  Please let us  

 know how you make out.

- 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:

http://www.matronics.com/Navigator?JabiruEngine-List

_________________
Lynn
Kitfox IV-Jabiru 2200
N369LM

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