Head Bolt Thread Sealer - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > General Technical Discussions > Engines & Drivetrain > Head Bolt Thread Sealer

Introducing MONSTALINER™ UV Permanent DIY Roll On Bed LineFS: Jeep Fog Light LED Bulbs! Several Brightness Options! Clayton Off Road JK Short Arm Suspension Kits

Reply
Unread 03-21-2013, 07:22 AM   #1
argos587
Registered User
1993 ZJ 
 
Join Date: Mar 2011
Location: Wylie, TX
Posts: 10
Head Bolt Thread Sealer

Had to remove head on 4.0 - '93 ZJ and noticed in my Haynes manual for installation it states to add thread sealer to the head bolt that is most front of the engine (by thermostat) outside of the valve cover. Also the torque is different from the rest. Is thread sealer really necessary and should the torque be different from the rest?

argos587 is offline   Reply With Quote
Unread 03-21-2013, 08:28 AM   #2
mdm
Farm Wheeler
2000 TJ Wrangler 
 
Join Date: Apr 2005
Location: Elkmont, AL
Posts: 9,713
The book is correct on both counts. The sealer is needed because the bolts goes through the water jacket. If it isn't sealed you will have a coolant leak. The lower torque is used because the sealer acts as a lubricant when the bolt is tightened. If it were torqued at the same value as the other bolts you may damage parts.
__________________
Keep in mind that free advice can frequently be worth less than you pay for it.
mdm is offline   Reply With Quote
Unread 03-21-2013, 08:54 AM   #3
argos587
Registered User
1993 ZJ 
 
Join Date: Mar 2011
Location: Wylie, TX
Posts: 10
So just just to be clear, I add sealer to the threads that will go into the block or at the top of the bolt where it is exposed to the outside (this has the nut end with threads extending over)?
Any suggested sealer?
argos587 is offline   Reply With Quote
Unread 03-21-2013, 09:52 AM   #4
mdm
Farm Wheeler
2000 TJ Wrangler 
 
Join Date: Apr 2005
Location: Elkmont, AL
Posts: 9,713
From the '00 FSM:
(4) Coat the threads of stud bolt No.11 with Loctite
592 sealant, or equivalent.
__________________
Keep in mind that free advice can frequently be worth less than you pay for it.
mdm is offline   Reply With Quote




Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.