seal head bolts on small block - 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 10-30-2008, 12:13 PM
Registered User
 
Join Date: Oct 2008
Location: Crivitz, WI
Posts: 3
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
seal head bolts on small block

Has anyone used pipe thread compound on a small block Chevy to seal the head bolts that extend into the water jacket? If so how well did it hold up?
Thanks

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 10-30-2008, 12:39 PM
327NUT's Avatar
Registered User
 
Last photo:
Join Date: Dec 2004
Location: So. Utah
Age: 67
Posts: 3,234
Wiki Edits: 0

Thanks: 0
Thanked 70 Times in 64 Posts
You know it might work in a pinch but pipe joint compound is not made to withstand the heat that is generated in a combustion engine atmosphere. Go buy a tube of automotive thread sealer, it's cheap insurance and you'll never have to worry about it.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 10-30-2008, 04:04 PM
Registered User
 
Last photo:
Join Date: Apr 2007
Location: Seattle, Wa
Posts: 6,750
Wiki Edits: 0

Thanks: 4
Thanked 417 Times in 360 Posts
Quote:
Originally Posted by huppfan
Has anyone used pipe thread compound on a small block Chevy to seal the head bolts that extend into the water jacket? If so how well did it hold up?
Thanks
Paste type Teflon pipe joint compound works just fine. The stuff provides lubrication similar to the specs for oiled threads. By placing some into the bolt hole, a supply can be kept moving ahead of the bolt to insure that coolant doesn't get into the thread area causing corrosion in the lower interface.

Be careful when using any sealer to check that the hole isn't blind. Any sealing compound, oil, or other fluid that's pushed ahead of the bolt to the bottom of a blind hole will cause a hydraulic lock where forcing the bolt against the filling material risks cracking the casting.

Be sure the tapped holes and the bolts are clean and threads are undamaged. Having a thread restorer kit is priceless, these are not thread cutting tools but rather restoration. Thread cutting tools be they taps or dies may not produce the same quality standard as used on the engine. Running a class 3 tap on a class 1 thread will remove material you don't want removed. The restoring tools coax the threads back into position and cleans the gunk out without removing material from the thread itself. Check out this URL for an example kit http://www.sears.com/shc/s/p_10153_1...0070921x00003a or http://www.google.com/products?hl=en...num=1&ct=title .

I've used Teflon paste for decades on many, many engines for street and competition without any issues what-so-ever. Unlike RTV or epoxy materials, the paste pushed into the cooling jackets doesn't harden and the action of the water pump breaks up anything circulating into colloidal particles so the stuff won't cause unwanted blockage of cooling passages.

Bogie
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
which small block chevy cylinder head? pds23 Engine 2 07-22-2008 07:19 AM
rear oil seal help alrobjr Engine 5 01-24-2006 07:12 AM
350 small block head gaskets oldnable Engine 13 02-13-2005 12:42 AM


All times are GMT -6. The time now is 03:43 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.