Aviation Form-A-Gasket Sealant for headbolt threads? - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Engine
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 06-20-2008, 06:43 PM
j.d.brown.042964's Avatar
406 Caprice:Rust Never Sleeps!
 
Join Date: Jun 2007
Location: St.Clair County,Alabama.
Age: 50
Posts: 278
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Aviation Form-A-Gasket Sealant for headbolt threads?

Getting ready to put my heads back onto the new 406 shortblock and was wondering about using "Aviation Form-A-Gasket" sealant as a pliable (or should I say "viable"?) solution for headbolt thread sealing. Anyone ever used it for this application? My thinking is that it might produce a bit less drag on the fastener(s) {ARP Bolts} than pipe sealant or black RTV silicone-which are possible options mentioned to me by some other people locally (whom both swear they've used them successfully). I'm just thinking I might get "truer" torque readings-especially on 2nd and 3rd stages of tightening to final torque value. Could I get some feedback on this? (Heads are aluminum-thick deck, and yes I'll be using oil on the usual places). -Thanks,Jim.

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 06-20-2008, 07:03 PM
richard stewart 3rd's Avatar
Registered User
 

Last journal entry: 351W rebuild
Last photo:
Join Date: Jan 2006
Location: tremont, pa.
Age: 69
Posts: 2,217
Wiki Edits: 0

Thanks: 13
Thanked 15 Times in 14 Posts
Hi,
I haven't used aviation for a long time, but I think it gets tacky, I would use what just about everyone
else uses, black silicone, & a can of sealer when you
fill it with coolant.
Rich
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 06-20-2008, 07:29 PM
Member
 
Last photo:
Join Date: Jun 2004
Location: Texas
Age: 60
Posts: 248
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I use Permatex Aviation form-a-gasket for sealing head bolts and never had a problem. It will get tacky if left out to semi dry. But I put it on the threads and put the bolts in without time for set up.

gcrmcc
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 06-20-2008, 07:39 PM
King of my Man-cave.
 
Last photo:
Join Date: Nov 2003
Location: Michigan
Age: 55
Posts: 2,899
Wiki Edits: 0

Thanks: 3
Thanked 15 Times in 12 Posts
Not everybody else uses silicone for head bolts and, if fact, it is not recommended for that purpose.

tom
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 06-20-2008, 08:02 PM
Stroke Meister
 
Last photo:
Join Date: Mar 2007
Location: MI, USA
Posts: 704
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
+1 ^^^

I do not like silicon for this reason. Silicone rtv has been found in more places than it doesn't belong than where it does. JMO

Aviation #80019 is some wonderful stuff, as is hylomar, and many other non silicone sealants.
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 06-20-2008, 08:16 PM
Registered User
 
Last photo:
Join Date: Jun 2007
Location: TN.
Posts: 287
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
remember the days before silicone? silicone is great on the corners of pan gasket and intake in proper proportions. i get engines all the time just gooped up everywhere. any way do as tom and stroke said.

sam-missle
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 06-20-2008, 09:09 PM
j.d.brown.042964's Avatar
406 Caprice:Rust Never Sleeps!
 
Join Date: Jun 2007
Location: St.Clair County,Alabama.
Age: 50
Posts: 278
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Thanks for the input guys, I really prefer the idea of the Form-A-Gasket sealant, as I believe that,"as applied",in it's thinner consistency,it MIGHT allow for more accurate torque readings, and I had absolutely no doubts about it's sealing abilities,-just never used it for this application before. I'm also of the belief that it may stay more flexible and affect any possible re-torqueing values less than other products. So... that's what I'm gonna use!-Just wanted to get some opinions on the positive side of that idea first!-THANKS AGAIN.-Jim
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 06-21-2008, 05:08 AM
v8hed's Avatar
AK427
 
Last photo:
Join Date: May 2008
Location: Northampton, UK
Age: 39
Posts: 794
Wiki Edits: 0

Thanks: 1
Thanked 3 Times in 3 Posts
My 350 had what looks like black RTV on the headbolt threads. It's gonna be fun cleaning-out the bolt holes in the block! For re-assembly, I'll be using Loctite 572 as recommended by a respected engine shop over here. I was going to use ARP thread sealer, but they advised against this unless the block was new (or new-ish). They advised me to go with Loctite 572, as this was a product they'd arrived at after lengthy discussions with Loctite to resolve issues they were having with other sealers. It's pricey ($30+ for a small bottle) but it has a long shelf-life.

Cheers,
Ian.
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 06-21-2008, 05:48 AM
CNC BLOCKS NE's Avatar
CNC Blocks Northeast
 
Last photo:
Join Date: Sep 2006
Location: NORTHEAST
Age: 54
Posts: 1,436
Wiki Edits: 0

Thanks: 1
Thanked 17 Times in 17 Posts
We use Arp head bolts for our builds and use there thread sealer as recomended and no issues over the years.
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 06-21-2008, 10:38 AM
Registered User
 
Last photo:
Join Date: Jun 2008
Location: USA
Posts: 1,172
Wiki Edits: 0

Thanks: 0
Thanked 2 Times in 2 Posts
IMO
the most important factor is thoroughly cleaning the threaded hole with a brass gun barrel bore brush, and thread chaser if necessary, using spray cleaner, and thoroughly drying with compressed air.

I prefer the ARP sealer

but have used liquid teflon and Aviation Permatex (brown liquid in the bottle with a brush) with success in years past.

Silicone RTV is a no-no most everywhere except intake manifold end seals.

Since silicone was mentioned for pan corners, IMO I prefer one piece rubber pan gaskets.
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 06-21-2008, 11:49 AM
j.d.brown.042964's Avatar
406 Caprice:Rust Never Sleeps!
 
Join Date: Jun 2007
Location: St.Clair County,Alabama.
Age: 50
Posts: 278
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I was indeed referring to the {Aviation Permatex (brown liquid in the bottle with a brush)} myself when I was making the initial inquiry, and yes I'll be certain to be sure the tapped threads in the block are thoroughly clean and dry. Anyways...Thanks to all for the feedback. I gotta run;Wifey wants the computer back! -Jim
Reply With Quote Quick reply to this message

Recent Engine posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

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

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Mr. Gasket Arcuden Engine 12 10-02-2007 04:27 PM
high temp exhaust gasket in sheet form ? lowROLLERchevy Engine 7 01-09-2007 12:03 AM
Gasket Sealant terry65elcamino Engine 7 12-22-2003 10:19 AM


All times are GMT -6. The time now is 03:11 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.