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Galant VR-4 Forums » Galant VR-4 » How To and Info Archive » Busted Throttle Butterfly Screws
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Busted Throttle Butterfly Screws


Pivvay
Unregistered


Galant VR-4 org Post #: 109001 posted 04/07/04 09:28 PM     Remind Me!  Send Private Message   Edit Post      
 -

So I'm finally rebuilding my throttle body with the new orings from MachV (thanks Kibo) and my new FIAV and ISC blockoff plate. Of course 2 screws on the butterfly broke in half. Who knew PB blaster soak(s) and the right size screwdriver wouldn't be enough for me? [Roll Eyes] So the electric screwdriver and all my weight got them out in 2 pieces. The threads are still fine.

Now I need to put everything back together sometime soon so where can I pickup 2 more screws? Also what grease did everyone use on the seals? Does anything work or does it need to be silicon based per the VFAQ?

Finally not stressed about breaking some screws. Go Civic power! [Big Grin]

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atc250r Galant VR4.org Moderator
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Galant VR-4 org Post #: 109002 posted 04/07/04 09:35 PM     Remind Me!  Send Private Message   Edit Post      
If it has to be silicon based get some Sil-Glyde from the local NAPA store. It is used to lube brake caliper pins/sliders so if you plan on doing your own brakes you'll definitely have use for it. I gotta get around to doing my t-body one of these days.

John

Posts: 13235 | From: Orange County, NY | Member Since: 09/11/03 | IP: (68.193.209.233) | Report this post to a Moderator

Pivvay
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Galant VR-4 org Post #: 109003 posted 04/07/04 09:42 PM     Remind Me!  Send Private Message   Edit Post      
So far the TB is super easy except for the screws i broke. Sometimes they come out easy, sometimes not. I just need to know how to replace them now and if the grease has to be anything special.

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turbogalant
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Galant VR-4 org Post #: 109004 posted 04/07/04 10:20 PM     Remind Me!  Send Private Message   Edit Post      
Bone yard, ace, true value.

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Pivvay
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Galant VR-4 org Post #: 109005 posted 04/07/04 10:23 PM     Remind Me!  Send Private Message   Edit Post      
quote:
Originally posted by turbogalant:
Bone yard, ace, true value.

So they're a standard size? If so I'll fix them tomorrow at work or run to the hardware store. my guess is they're m5x.8?

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Hibrn8
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Galant VR-4 org Post #: 109006 posted 04/07/04 10:37 PM     Remind Me!  Send Private Message   Edit Post      
Ace seems to have all the metrics, even the most rare ones.

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Hertz Galant VR4.org Administrator
OneTitle to rule them all.
77/2000


Galant VR-4 org Post #: 109007 posted 04/08/04 08:32 AM     Remind Me!  Send Private Message   Edit Post      
Get titanium screws. [Smile]

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Oztek
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Galant VR-4 org Post #: 109008 posted 04/08/04 08:46 AM     Remind Me!  Send Private Message   Edit Post      
The problem with those screws is that they seem to be made from an extremely soft metal. If you don't have a very good grip with the screw-driver, they will strip out very easily.

Luckily I had a spare throttle body around that I could canibilize for parts.

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Pivvay
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Galant VR-4 org Post #: 109009 posted 04/08/04 08:50 AM     Remind Me!  Send Private Message   Edit Post      
mine started to strip so I tried another method, namely the electric drill on a high clutch setting with a screwdriver bit. With all my weight down on the screw and drill it didn't strip but it did snap them right in half. Then the bottoms easily came out the other way. Depending out how hard they peened the bottom of the screw I'm not sure some would ever come out in one piece!

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atc250r Galant VR4.org Moderator
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Galant VR-4 org Post #: 109010 posted 04/08/04 09:36 AM     Remind Me!  Send Private Message   Edit Post      
What are you gonna do to keep the new ones in? Peen them again or maybe a little tack weld?

John

Posts: 13235 | From: Orange County, NY | Member Since: 09/11/03 | IP: (68.193.209.233) | Report this post to a Moderator

a_santos
Brasileiro Turbinado


Galant VR-4 org Post #: 109011 posted 04/08/04 10:53 AM     Remind Me!  Send Private Message   Edit Post      
A budget mod to do while it is out is grind the shaft down so that is is more aerodynamic. You can also grind the ends of the screws if they stick out. Tha way when the butterfly is fully open, it has a lower profile.

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RayH
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Galant VR-4 org Post #: 109012 posted 04/08/04 11:09 PM     Remind Me!  Send Private Message   Edit Post      
quote:
Originally posted by a_santos:
A budget mod to do while it is out is grind the shaft down so that is is more aerodynamic. You can also grind the ends of the screws if they stick out. Tha way when the butterfly is fully open, it has a lower profile.

And if you have alot of time on your hands, grind the leading and trailings edges of the plate, taking care not to change the overall diameter.

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Pivvay
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Galant VR-4 org Post #: 109013 posted 04/08/04 11:41 PM     Remind Me!  Send Private Message   Edit Post      
I was just going to red locktight the screws. Maybe hit the backs with a punch too.

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turboflanagan
I would give myself something respectable.
478/1000


Galant VR-4 org Post #: 109014 posted 04/08/04 07:16 PM     Remind Me!  Send Private Message   Edit Post      
You are going to cryo the assy after you balance it right? [Wink]

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Pivvay
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Galant VR-4 org Post #: 109015 posted 04/08/04 07:34 PM     Remind Me!  Send Private Message   Edit Post      
Yep...my freezer is standing by [ROFLMAO]

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atc250r Galant VR4.org Moderator
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Galant VR-4 org Post #: 109016 posted 04/08/04 09:20 PM     Remind Me!  Send Private Message   Edit Post      
quote:
Originally posted by turboflanagan:
You are going to cryo the assy after you balance it right? [Wink]

VERY IMPORTANT!!!! Don't forget to magnaflux it too. [Wink]

John

Posts: 13235 | From: Orange County, NY | Member Since: 09/11/03 | IP: (68.193.209.233) | Report this post to a Moderator

sleepyvr4
I Hate Kitty Cats


Galant VR-4 org Post #: 109017 posted 04/08/04 09:22 PM     Remind Me!  Send Private Message   Edit Post      
I got lucky and only ruined one of my screws. I got a replacement in an old r/c parts bin.

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Pivvay
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Galant VR-4 org Post #: 109018 posted 04/08/04 09:30 PM     Remind Me!  Send Private Message   Edit Post      
They seem to be m4x.70. anyone confirm?

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PacManVR4
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Galant VR-4 org Post #: 109019 posted 04/08/04 10:01 PM     Remind Me!  Send Private Message   Edit Post      
I would rather not grind down the TB shaft...

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TWEAKD4
Member ++
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Galant VR-4 org Post #: 109020 posted 04/09/04 06:56 AM     Remind Me!  Send Private Message   Edit Post      
Vfaq is your friend. From http://www.ca.dsm.org/faq/tb-shaftseals.html. This faq says to use 4mm x .75. My local DO-It-Best didn't have that size so I used 4mm x .70 and they worked fine. Just used red locktight and all is good.

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Pivvay
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Galant VR-4 org Post #: 109021 posted 04/09/04 06:59 AM     Remind Me!  Send Private Message   Edit Post      
Thanks for the link. I had been looking at the other VFAQ on it and it didn't mention size.

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Pivvay
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Galant VR-4 org Post #: 109022 posted 04/10/04 08:30 PM     Remind Me!  Send Private Message   Edit Post   
m4 screws were right. I used 8mm length and loctited them. Now it's all reassembled, TPS readjusted, new oring, cleaned. Smooth as it's ever been and snaps right back closed.

Now if it would stop SNOWING I could put the GVR4 back together with it's new goodies.

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