Welcome! Please use the navigational links to explore our website.
PartsASAP LogoCompany Logo Auction Link (800) 853-2651

Shop Now

   Allis Chalmers Case Farmall IH Ford 8N,9N,2N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver

Ford 9N, 2N & 8N Discussion Forum
:

Re-torque Head Bolts

Welcome Guest, Log in or Register
Author 
RickD

09-26-2006 06:42:01




Report to Moderator

I rebuilt my 8N engine and used a thread sealer- Permatex High Temperature Thread Sealer on the head bolts. I had read on the forum that when you use a thread sealer, the head bolt torque should be reduced. Although I can't remember what torque I did use, I now have a very slight seepage of oil coming from the headgasket area. I know you are suppossed to re-torque the head bolts after running the engine for a period of time after a rebuild, but I was affraid that a re-torque would destroy the effectiveness of the thread sealer I used so I did not re-torque. Should I re-torque now? If so, what setting do I use? Do I need to worry about the thread sealer? Thanks in advance.

[Log in to Reply]   [No Email]
TheOldHokie

09-26-2006 07:05:29




Report to Moderator
 Re: Re-torque Head Bolts in reply to RickD, 09-26-2006 06:42:01  
According to the Data Sheet for that product (Data Sheet Here) parts may be repositioned up to 24 hours after application and is fully cured after 72 hours. I deduce from that that repositioning after the 72 hour full cure will compromise the seal. The sheet explicitly states that it allows for repositioning of parts "shortly after assembly".

They also claim "high lubricating properties" of uncured compound which would suggest that initial torque values for the bolts should be roughly equivalent to that for oiled threads. Since it's an anaerobic cure process (hardens in the absence of air) I'd expect the torque required AFTER curing to be considerably higher.

Personally I'd avoid using an anaerobic type sealant for this reason. The general purpose Permatex thread sealants (Pipe Joint Compound with or without PTFE) are good to 300F-400F and don't harden.

If I were you I'd retorque to a MINIMUM of 70#, prossibly a bit more, and monitor the performance.

YMMV,

TOH

[Log in to Reply]  [No Email]
Dan

09-26-2006 07:01:52




Report to Moderator
 Re: Re-torque Head Bolts in reply to RickD, 09-26-2006 06:42:01  
What did you use for a thread sealant? Permatex high temp red RTV is non-hardening and will not be affected by re-torquing the bolt. Torque it to the minimum accepted torque (65 lbs.), then again after warm up, then yet again after 30 minutes or so of run time. Crank it up to 70 lbs. the last time if needed.

Good luck,
Dan



[Log in to Reply]  [No Email]
[Options]  [Printer Friendly]  [Posting Help]  [Return to Forum]   [Log in to Reply]

Hop to:


TRACTOR PARTS TRACTOR MANUALS
We sell tractor parts!  We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]

Home  |  Forums


Copyright © 1997-2023 Yesterday's Tractor Co.

All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy

TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.

Yesterday's Tractors - Antique Tractor Headquarters

Website Accessibility Policy