Head bolts
The FSM states that headbolts can be re-used 1 time. If you don't if they've been removed before, play it safe and get a new set.
Any autoparts store will be able to get them, they probably have them on the shelf.
Any autoparts store will be able to get them, they probably have them on the shelf.
::CF Administrator::





Joined: Feb 2011
Posts: 14,479
Likes: 805
From: Blunt, South Dakota
Year: 97
Model: Cherokee (XJ)
Engine: 4.6 stroker
Has your head been replaced before? Check the existing bolts, look for a paint mark on top, if it has this they have been re-used once already. Head bolts can be re-used one time as a general rule...but you can't always truly tell if they have been re-used or not unless the last person in there marked them. Get new if you are unsure, it's cheap insurance to make sure it's done correctly. I would just replace them anyways, but that's me.
CF Veteran
Joined: Jul 2013
Posts: 7,554
Likes: 17
From: Monett, MO.
Year: 1999
Model: Cherokee
Engine: 4.0
I "Always" replace the head bolts on an engine like that and not really knowing anything about it. I use Summit or Jegs and just order them the only brand I use are "ARP" fasteners period, best quality there are and prices at those two vendors.
CF Veteran
Joined: Apr 2009
Posts: 4,734
Likes: 12
Year: 2015, 2012
Model: Grand Cherokee (WK2)
Engine: 3.6L
Mine have been off and on my '92 at least 4 times now and my head hasn't blown off yet.
That was before I knew 2 times was the limit. If, and I hope it never comes to this, the head ever has to come off again I will replace them with ARP bolts.
That was before I knew 2 times was the limit. If, and I hope it never comes to this, the head ever has to come off again I will replace them with ARP bolts.
::CF Administrator::





Joined: Feb 2011
Posts: 14,479
Likes: 805
From: Blunt, South Dakota
Year: 97
Model: Cherokee (XJ)
Engine: 4.6 stroker
...for those who don't understand why to replace these fasteners...it may not fail, but why risk it?
http://en.wikipedia.org/wiki/Torque-to-yield_fastener
http://en.wikipedia.org/wiki/Torque-to-yield_fastener
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