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Exhaust pipe

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steven.pitt2(at)ntlworld.
Guest

Posted: Fri Oct 24, 2008 8:36 am Post subject: Exhaust pipe

Remi,

The front port pipe on my 912S engine had the pipe and bell fitting (the 

flange that is bolted onto the engine) come apart at the weld (see picture 

as this explains better than my words). I realised I had a problem when 

taking off and I heard a noise that I had not heard before. The pipe was 

able to rattle in the flange fitting but did not fall off and was only 

observed once the engine cooled and I was able to grab the pipes and shake 

them.

I did not loose power but aborted the take off due to the change in noise.

The engine has done 120 hours.

Hope this helps.

Regards

Steve Pitt

G-SMDH

DSCN1604

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topglock(at)cox.net
Guest

Posted: Fri Oct 24, 2008 11:19 am Post subject: Exhaust pipe

Steve,



I had the same break on the #3 pipe at 400 hours...



Jeff - Baby Blue



Steven Pitt wrote:

 	  Quote: 	
		   Remi,

 The front port pipe on my 912S engine had the pipe and bell fitting (the 

 flange that is bolted onto the engine) come apart at the weld (see 

 picture as this explains better than my words). I realised I had a 

 problem when taking off and I heard a noise that I had not heard before. 

 The pipe was able to rattle in the flange fitting but did not fall off 

 and was only observed once the engine cooled and I was able to grab the 

 pipes and shake them.

 I did not loose power but aborted the take off due to the change in noise.

 The engine has done 120 hours.

 Hope this helps.

 Regards

 Steve Pitt

 G-SMDH

 DSCN1604

 

 

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

 

 

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

 

 

 Checked by AVG - http://www.avg.com

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willie.harrison(at)tinyon
Guest

Posted: Sat Oct 25, 2008 1:30 am Post subject: Exhaust pipe

Same on mine (front left) at approx 100 hrs.



Can anyone shed light on another exhaust problem - an allegedly bad  

batch of springs (too long, so silencer is not held on securely enough)?



Willie

On 24 Oct 2008, at 17:35, Steven Pitt wrote:



 	  Quote: 	
		   Remi,

 The front port pipe on my 912S engine had the pipe and bell fitting  

 (the flange that is bolted onto the engine) come apart at the weld  

 (see picture as this explains better than my words). I realised I  

 had a problem when taking off and I heard a noise that I had not  

 heard before. The pipe was able to rattle in the flange fitting but  

 did not fall off and was only observed once the engine cooled and I  

 was able to grab the pipes and shake them.

 I did not loose power but aborted the take off due to the change in  

 noise.

 The engine has done 120 hours.

 Hope this helps.

 Regards

 Steve Pitt

 G-SMDH

 DSCN1604



 <DSCN1604.JPG>

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topglock(at)cox.net
Guest

Posted: Sun Oct 26, 2008 6:52 am Post subject: Exhaust pipe

Willie and all,



What I surmise is that the alignment of the muffler is the culprit. 

Since the #s 1 & 3 are catty-cornered from each other and neither has an 

adjustable link, one tends to stand off the muffler if the #1 pipe is 

not perfectly adjusted.  This situation is what caused the exhaust leak 

on Baby Blue, which ultimately overheated the ignition coils and caused 

the rough running incident I encountered.



What I see happening is this:  The ball end of the pipe is not fully 

seated into the muffler, allowing the pipe to vibrate and setting up a 

resonation which ultimately leads to the cracks.  I may be totally off 

base, here, but it makes sense to me...



Jeff - Baby Blue



William Harrison wrote:

 	  Quote: 	
		   

 <willie.harrison(at)tinyonline.co.uk>

 

 Same on mine (front left) at approx 100 hrs.

 

 Can anyone shed light on another exhaust problem - an allegedly bad 

 batch of springs (too long, so silencer is not held on securely enough)?

 

 Willie

 

 

 On 24 Oct 2008, at 17:35, Steven Pitt wrote:

 

> Remi,

> The front port pipe on my 912S engine had the pipe and bell fitting 

> (the flange that is bolted onto the engine) come apart at the weld 

> (see picture as this explains better than my words). I realised I had 

> a problem when taking off and I heard a noise that I had not heard 

> before. The pipe was able to rattle in the flange fitting but did not 

> fall off and was only observed once the engine cooled and I was able 

> to grab the pipes and shake them.

> I did not loose power but aborted the take off due to the change in 

> noise.

> The engine has done 120 hours.

> Hope this helps.

> Regards

> Steve Pitt

> G-SMDH

> DSCN1604

>

> <DSCN1604.JPG>

 

 

 

 

 

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

 

 

 Checked by AVG - http://www.avg.com

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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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air.guerner(at)orange.fr
Guest

Posted: Sun Oct 26, 2008 10:42 am Post subject: Exhaust pipe

Thank you Steve,

 Apparently the cause is a defective weld.  

 Best regards

 Remi 

  

  

 ""The front port pipe on my 912S engine had the pipe and bell fitting (the  

flange that is bolted onto the engine) come apart at the weld (see picture""  

    [quote][b]

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