VansAirForceForums  
Home > VansAirForceForums

- POSTING RULES
- Donate yearly (please).
- Advertise in here!

- Today's Posts | Insert Pics

  #1  
Old 01-05-2012, 08:53 AM
Ironflight's Avatar
Ironflight Ironflight is offline
VAF Moderator / Line Boy
 
Join Date: Jan 2005
Location: Dayton, NV
Posts: 12,256
Question Removing Magneto Studs?

Hi folks - quick question for the experienced mechanics here. I need to replace the left magneto studs on the Valkyrie (swapping to _P-mags, and taking out the impulse coupler spacer - so need shorter studs). I've put doubled nuts on them and cranked, - they just aren't coming. I'm figuring heat is the answer, but I don't have a lot of experience with that - are we talking butane-torch heat? On the case? And how much?

Non-heat answers are even better - I haven't put gorilla strength on them yet - they are so long, they almost seem to want to twist....if the answer is "use more force!" we can try that too....

Of to lunch - let's see how many answers I get!
__________________
Paul F. Dye
Editor at Large - KITPLANES Magazine
RV-8 - N188PD - "Valkyrie"
RV-6 (By Marriage) - N164MS - "Mikey"
RV-3B - N13PL - "Tsamsiyu"
A&P, EAA Tech Counselor/Flight Advisor
Dayton Valley Airpark (A34)
http://Ironflight.com
Reply With Quote
  #2  
Old 01-05-2012, 08:55 AM
rocketbob's Avatar
rocketbob rocketbob is offline
 
Join Date: Jun 2006
Location: 8I3
Posts: 3,564
Default

Find a mechanic around that has a Snap On CG-500 stud extractor set. They are the best tools to use to remove studs.
__________________

Please don't PM me! Email only!

Bob Japundza CFI A&PIA
N9187P PA-24-260B Comanche, flying
N678X F1 Rocket, under const.
N244BJ RV-6 "victim of SNF tornado" 1200+ hrs, rebuilding
N8155F C150 flying
N7925P PA-24-250 Comanche, restoring
Not a thing I own is stock.
Reply With Quote
  #3  
Old 01-05-2012, 09:11 AM
Danny King's Avatar
Danny King Danny King is offline
 
Join Date: Dec 2004
Location: Southlake, Texas
Posts: 626
Default Stud removing tool

Paul,
I used Jay Pratt's stud remove removing tool yesterday replacing the short studs in the vacuum drive on the RV-1. It is the tool you need to do the job.
__________________
Danny King
Beautiful Doll 80434 TT 1675 hours
I0360 A1B6 200 HP
Christen Inverted Oil
First Flight 12 July 2000
VAF Dues current for 2020
Reply With Quote
  #4  
Old 01-05-2012, 09:12 AM
rhill rhill is offline
 
Join Date: Feb 2006
Location: Valley Forge, Pa
Posts: 636
Default

A good rap with a plastic mallet ,heat in the form of a pin point torch on the stud not the case will heat the area, the cam lock style stud remove-ll tool is the best way to go or a small pipe wrench will work in a pinch.PM me if you need the snap-on tool.
Bob
Reply With Quote
  #5  
Old 01-05-2012, 09:36 AM
aerhed aerhed is offline
 
Join Date: Dec 2008
Location: Big Sandy, WY
Posts: 2,567
Default

Second on the butane torch and tiny pipe wrench if the nuts won't do it (unless you can get the stud removal tool in there)
__________________
Actual repeat offender.
Reply With Quote
  #6  
Old 01-05-2012, 09:40 AM
Dennis_I's Avatar
Dennis_I Dennis_I is offline
 
Join Date: Dec 2005
Location: Sweden, 67" North
Posts: 68
Default

I?ve used a normal heat gun, heat it properly and if needed you can buy a Freeze spray and spray the stud, it should come off easy... You dont want a open flame behind the engine while it is installed in the A/C, even if using a heat gun make sure you have a fire ext in close range

/Dennis
__________________
Dennis Isaksson
G?llivare, Sweden

Grew up with an RV-4, SE-XIO

Now: RV-8, Showplanes Fastback. #83218 Under construction, SE-XXO

Engine and avionic installation in progress
Reply With Quote
  #7  
Old 01-05-2012, 09:55 AM
RV8R999 RV8R999 is offline
 
Join Date: Dec 2008
Location: na
Posts: 1,457
Default

If you don't want to reuse the studs - clean the stud thoroughly with MEK. Take two nuts and clean throughouly with MEK. Put a couple of drops of super glue on the stud down to the last thread (assuming you have unthreaded shank available). Torque the 1st down to the end and torque the 2nd nut onto the first while holding the first and super glue this in place. Let dry a few minutes and remove using the first nut. Done if a dozen times.
Reply With Quote
  #8  
Old 01-05-2012, 10:29 AM
jrs14855 jrs14855 is offline
 
Join Date: Apr 2008
Location: Lake Havasu City AZ
Posts: 2,393
Default stud

I've removed broken cylinder studs from IO 540 with some good vice grips-tightened really tight. Some of the studs were only sticking out 1/8". No heat. Heat is fine if you don't get carrried away. If you don't intend to reuse the studs use vice grips. Vice grips as tight as you can get them using two hands with gloves on. Once they start to turn you can probably switch to double nuts.
Reply With Quote
  #9  
Old 01-05-2012, 10:55 AM
Fearless's Avatar
Fearless Fearless is offline
 
Join Date: Aug 2006
Location: Crestwood, KY
Posts: 848
Default spacers?

What about putting some steel spacers on to make up the distance the impulse adapter took. McMaster Carr should have some (92145A128).
__________________
Mike
RV-9A Based K6I2
Flying - out of Phase 1
Building RV-12 with brother
Reply With Quote
  #10  
Old 01-05-2012, 01:52 PM
mike newall's Avatar
mike newall mike newall is offline
 
Join Date: Jan 2005
Location: Yorkshire, England
Posts: 2,052
Default

Don't Do It Ethel............

Had the same issue on our Mattituck IO-360 when we swapped out from LASAR to P-Mag.

Those studs will snap off.

Measure the new distance allowing for the loss of the impulse coupler, get some thick wall 4130 tubing, washer either side, crank it down - works a treat.

This was passed by the great and the good at our end and has been absolutely fine for over 50 hours without any problems.
__________________
"I add a little excitement, a little spice to your lives, and all you do is complain!" - Q

Donated in 2020
Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -6. The time now is 06:46 AM.


The VAFForums come to you courtesy Delta Romeo, LLC. By viewing and participating in them you agree to build your plane using standardized methods and practices and to fly it safely and in accordance with the laws governing the country you are located in.