Matronics Email Lists :: View topic - Valve rocker shaft / bearing wear

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

Valve rocker shaft / bearing wear

Matronics Email Lists Forum Index -> JabiruEngine-List

View previous topic :: View next topic

Author Message

andy(at)suncoastjabiru.co
Guest

Posted: Wed May 09, 2007 9:29 am Post subject: Valve rocker shaft / bearing wear

Lynn,



You seem to have done all that is necessary in investigating and remedying

the problem.



I note your email about distributor shaft scoring where the oil seals ride,

but there were no pictures. I don't have a 'quick fix' for that issue

either; it's certainly not a usual occurrence - either oil leaking past the

seal or scoring of the shaft by the seal, and certainly not at the hours you

have. Those seals are usually pretty good but my guess is the one that was

leaking must have been damaged - maybe from new, and the one that scored the

other shaft had picked-up an abrasive particle in the seal. Unlikely? Yes,

but possible. I've seen many bearing / shaft instances where the (relatively

soft) bearing is in good condition, yet the (much harder) shaft has been

worn down. This is due to abrasive particles bedding into the soft bearing

(or in your case seal) material, and cutting away at the harder shaft.

Again, it seems you were unlucky in having these issues but no doubt you

have rectified them.



Andy



Suncoast Sportplanes, Inc.

39248 South Ave, Zephyrhills, FL 33542

Tel: (813) 779 2324 Fax: (813) 779 2246

www.suncoastjabiru.com



--

- 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 Matteson

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

Posted: Wed May 09, 2007 1:06 pm Post subject: Valve rocker shaft / bearing wear

Andy-

Yes, that problem has been cured. New seals, new caps and rotors, and  

a little product call "Speedi Sleeve". I also drilled a hole in the  

lower area of each cap so I could feel there and see if the fix was  

still working.

In the email to you, Pete, and Jim, I ended with "I have pictures  

available" (or something like that), and Jim responded that he would  

like to see them. I sent to him, and CC'd you and Pete. They were  

sent via Kodak EasyShare. If you'd like to see them, holler. I sent  

them about 3/24/2007 or thereabouts.



Lynn Matteson

Grass Lake, Michigan

Kitfox IV Speedster  w/Jabiru 2200

flying w/275+ hrs

On May 9, 2007, at 1:27 PM, Andy Silvester wrote:



 	  Quote: 	
		   

 <andy(at)suncoastjabiru.com>



 Lynn,



 You seem to have done all that is necessary in investigating and  

 remedying

 the problem.



 I note your email about distributor shaft scoring where the oil  

 seals ride,

 but there were no pictures. I don't have a 'quick fix' for that issue

 either; it's certainly not a usual occurrence - either oil leaking  

 past the

 seal or scoring of the shaft by the seal, and certainly not at the  

 hours you

 have. Those seals are usually pretty good but my guess is the one  

 that was

 leaking must have been damaged - maybe from new, and the one that  

 scored the

 other shaft had picked-up an abrasive particle in the seal.  

 Unlikely? Yes,

 but possible. I've seen many bearing / shaft instances where the  

 (relatively

 soft) bearing is in good condition, yet the (much harder) shaft has  

 been

 worn down. This is due to abrasive particles bedding into the soft  

 bearing

 (or in your case seal) material, and cutting away at the harder shaft.

 Again, it seems you were unlucky in having these issues but no  

 doubt you

 have rectified them.



 Andy



 Suncoast Sportplanes, Inc.

 39248 South Ave, Zephyrhills, FL 33542

 Tel: (813) 779 2324 Fax: (813) 779 2246

 www.suncoastjabiru.com

- 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

Display posts from previous:

	Matronics Email Lists Forum Index -> JabiruEngine-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