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Seized exhaust rings - Yak52 M14P

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nigel(at)yakdisplay.com
Guest

Posted: Wed Aug 24, 2011 9:42 pm Post subject: Seized exhaust rings - Yak52 M14P

Can anyone help?

 

Am in a bit of a pickle with our Yak52 so am after advice and possible parts if we can….

 

A couple of exhausts have come loose  (M14P engine) – and the rings are locked solid – we can’t budge them. The holes for the special tool have long since been mauled away.

 

The exhausts in question are (viewed from INSIDE the cockpit) the very top cylinder, and the one to the immediate right of it (12 o’clock and 1 o’clock). The top cylinder is a 45 degree angle short piece, and the next one is a T-piece.

 

The questions are:

 

<![if !supportLists]>1.       <![endif]>Do you have any bright ideas how to get the rings off without cutting them or damaging the cylinder head threads?

<![if !supportLists]>2.       <![endif]>Do you sell the rings and olives separate (we could cut the existing exhaust to get the new ones on and re-weld exhaust)?

<![if !supportLists]>3.       <![endif]>Do you sell the two exhaust parts in question complete with the rings and olives?

 

As usual, we’ve got a display booked for this weekend – your advice and help would be very welcome!

 

Perhaps you could let us know ASAP….. and costs if anyone has anything appropriate….

 

Thanks in advance

 

Nigel

  [quote][b]

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dsavarese0812(at)bellsout
Guest

Posted: Thu Aug 25, 2011 5:01 am Post subject: Seized exhaust rings - Yak52 M14P

Your problem is not unusual Nigel. Although I'm sure there are 100's of 

suggestions on how to loosen the exhaust collars, I will share what I 

have used in the past with only moderate success. That means it does not 

work in every situation. The last resort is as you mentioned, cutting 

the collar off the threaded exhaust port, then cutting the exhaust 

section, installing a new collar and welding the exhaust section 

precisely in the same position.

I have soaked the threads around the exhaust collar with;

- PB Blaster

- Mouse Milk



You will have to soak the threads heavily and let them sit for several 

hours.



I have also heated the collar using a propane torch and then tried 

turning it. BUT not with PB Blaster or Mouse Milk on the threads. 

Especially if the stuff is still liquid. It's flammable.



Before reinstalling the threaded collar on the exhaust port, be sure to 

thoroughly clean the threads with a wire brush. If reusing the original 

collar, be sure to thoroughly clean the threads on it as well. Then I 

put copper based anti-seize compound around the port and collar threads, 

like the type one would use on the spark plug threads. This seems to 

help, should you ever need to tighten or loosen the collar again.



Dennis



A. Dennis Savarese

334-285-6263

334-546-8182 (cell)

Skype: Yakguy1

www.yak-52.com

On 8/25/2011 1:08 AM, Nigel Willson wrote:

 	  Quote: 	
		   

 Can anyone help?



 Am in a bit of a pickle with our Yak52 so am after advice and possible parts

 if we can….



 A couple of exhausts have come loose  (M14P engine) – and the rings are

 locked solid – we can’t budge them. The holes for the special tool have long

 since been mauled away.



 The exhausts in question are (viewed from INSIDE the cockpit) the very top

 cylinder, and the one to the immediate right of it (12 o’clock and 1

 o’clock). The top cylinder is a 45 degree angle short piece, and the next

 one is a T-piece.



 The questions are:



 1. Does anyone have any bright ideas how to get the rings off without

 cutting them or damaging the cylinder head threads?

 2. Does anyone sell the rings and olives separate (we could cut the existing

 exhaust to get the new ones on and re-weld exhaust)?

 3. Does anyone sell the two exhaust parts in question complete with the

 rings and olives?



 As usual, we’ve got a display booked for this weekend – your advice and help

 would be very welcome!



 Perhaps you could let us know ASAP….. and costs if anyone has anything

 appropriate….



 Thanks in advance



 Nigel

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dougsappllc(at)gmail.com
Guest

Posted: Thu Aug 25, 2011 9:29 am Post subject: Seized exhaust rings - Yak52 M14P

Nigel,

The best penetrating fluid I have found to date is a 50/50 mix of ATF

and acetone.  This mix seems to go where MM and most others won't.  I have

no experience with PB Blaster.



The replacement exhaust nuts can be installed without cutting and re welding

the pipe, this is done with the use of a jewelers saw and a tig welder.

 Call me if you need me to walk you through it.  I have done it many times.



Care needs to be taken when attempting to remove a stuck exhaust nut as the

exhaust boss (the part the exhaust nut screws on to) is simply threaded

into, then staked in the alu cylinder head.  Excessive force can loosen the

stake or strip the threads out of the cyl.  Go slowly and carefully.



Best,

Doug

509-826-4610



On Thu, Aug 25, 2011 at 5:59 AM, A. Dennis Savarese <

dsavarese0812(at)bellsouth.net> wrote:



[quote] 

 dsavarese0812(at)bellsouth.net>



 Your problem is not unusual Nigel. Although I'm sure there are 100's of

 suggestions on how to loosen the exhaust collars, I will share what I have

 used in the past with only moderate success. That means it does not work in

 every situation. The last resort is as you mentioned, cutting the collar off

 the threaded exhaust port, then cutting the exhaust section, installing a

 new collar and welding the exhaust section precisely in the same position

- The Matronics Yak-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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dandmaz(at)cox.net
Guest

Posted: Thu Aug 25, 2011 9:38 am Post subject: Seized exhaust rings - Yak52 M14P

good to see you back in the saddle .  

   

Don  

         

  

From: owner-yak-list-server(at)matronics.com [mailto:owner-yak-list-server(at)matronics.com] On Behalf Of doug sapp

 Sent: Thursday, August 25, 2011 10:26 AM

 To: yak-list(at)matronics.com

 Subject: Re: Yak-List: Seized exhaust rings - Yak52 M14P  

  

   

Nigel,    

The best penetrating fluid I have found to date is a 50/50 mix of ATF and acetone.  This mix seems to go where MM and most others won't.  I have no experience with PB Blaster.   

    

   

    

The replacement exhaust nuts can be installed without cutting and re welding the pipe, this is done with the use of a jewelers saw and a tig welder.  Call me if you need me to walk you through it.  I have done it many times.  

    

   

    

Care needs to be taken when attempting to remove a stuck exhaust nut as the exhaust boss (the part the exhaust nut screws on to) is simply threaded into, then staked in the alu cylinder head.  Excessive force can loosen the stake or strip the threads out of the cyl.  Go slowly and carefully.  

    

   

    

Best,  

    

Doug  

    

509-826-4610    

On Thu, Aug 25, 2011 at 5:59 AM, A. Dennis Savarese <dsavarese0812(at)bellsouth.net (dsavarese0812(at)bellsouth.net)> wrote:  

--> Yak-List message posted by: "A. Dennis Savarese" <dsavarese0812(at)bellsouth.net (dsavarese0812(at)bellsouth.net)>

 

 Your problem is not unusual Nigel. Although I'm sure there are 100's of suggestions on how to loosen the exhaust collars, I will share what I have used in the past with only moderate success. That means it does not work in every situation. The last resort is as you mentioned, cutting the collar off the threaded exhaust port, then cutting the exhaust section, installing a new collar and welding the exhaust section precisely in the same position.

 I have soaked the threads around the exhaust collar with;

 - PB Blaster

 - Mouse Milk

 

 You will have to soak the threads heavily and let them sit for several hours.

 

 I have also heated the collar using a propane torch and then tried turning it. BUT not with PB Blaster or Mouse Milk on the threads. Especially if the stuff is still liquid. It's flammable.

 

 Before reinstalling the threaded collar on the exhaust port, be sure to thoroughly clean the threads with a wire brush. If reusing the original collar, be sure to thoroughly clean the threads on it as well. Then I put copper based anti-seize compound around the port and collar threads, like the type one would use on the spark plug threads. This seems to help, should you ever need to tighten or loosen the collar again.

 

 Dennis

 

 A. Dennis Savarese

 [url=tel:334-285-6263]334-285-6263[/url]

 [url=tel:334-546-8182]334-546-8182[/url] (cell)

 Skype: Yakguy1

 www.yak-52.com      



 

 

 On 8/25/2011 1:08 AM, Nigel Willson wrote:  

-->  Yak-List message posted by: "Nigel Willson"<nigel(at)yakdisplay.com (nigel(at)yakdisplay.com)>

 

 

 Can anyone help?

 

 Am in a bit of a pickle with our Yak52 so am after advice and possible parts

 if we can….

 

 A couple of exhausts have come loose  (M14P engine) – and the rings are

 locked solid – we can’t budge them. The holes for the special tool have long

 since been mauled away.

 

 The exhausts in question are (viewed from INSIDE the cockpit) the very top

 cylinder, and the one to the immediate right of it (12 o’clock and 1

 o’clock). The top cylinder is a 45 degree angle short piece, and the next

 one is a T-piece.

 

 The questions are:

 

 1. Does anyone have any bright ideas how to get the rings off without

 cutting them or damaging the cylinder head threads?

 2. Does anyone sell the rings and olives separate (we could cut the existing

 exhaust to get the new ones on and re-weld exhaust)?

 3. Does anyone sell the two exhaust parts in question complete with the

 rings and olives?

 

 As usual, we’ve got a display booked for this weekend – your advice and help

 would be very welcome!

 

 Perhaps you could let us know ASAP….. and costs if anyone has anything

 appropriate….

 

 Thanks in advance

 

 Nigel

 

 

 

 

 

 

   



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