post #1 of Old 09-07-2011, 03:04 PM Thread Starter
DoozerPeej
Registered User
1990 YJ Wrangler 
 
Join Date: Nov 2010
Location: North Salt Lake
Posts: 33
4.2 to 4.0 head swap head bolts?

I have read a bunch of posts about there being different lengths of head bolt? I have a 1990 wrangler with the 4.2 and have a head (casting 7120) all ready to go. I know I have the 1/2 inch head bolts due to its the last year the wrangler had the 4.2, but I have read that a bunch of people have had issues with the 4.0 head bolts bottoming out, and then some saying they didn't have an issue. I am just curious on what everyone out there has used? or if my best bet is going to be to tear into it and once I get to that point put the project on hold and wait for the right bolts to ship. Local dealership wants $27ea for the studded ones, and $5ea for the regular ones. I can find a whole set for about $45 but they say either 4.0 or 4.2, any suggestions?

DoozerPeej is offline  
post #2 of Old 09-07-2011, 03:38 PM
Alabamaranger
Registered User
1990 YJ Wrangler 
 
Join Date: Sep 2006
Location: Leeds AL
Posts: 1,716
I beleive I used all of my 4.2 head bolts.

90 YJ, 4.2 with 2150 carb 4.0 Head and headers, Nutter with TFI and MSD. 1" BL, 2.5" spring lift, 33", Goodrich KM Mud Tires. Dana 30 w Aussie, Ford 8.8 w LS. 9000lb HF Winch.
Alabamaranger is offline  
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Jeep Forums Replies Last Post
4.2 intake on 4.0 head? Head swap problems! grimjeeperyj14 YJ Wrangler Technical Forum 27 03-17-2011 10:53 AM
Head Bolt Torque for 4.0 Head Swap + other ? nfisher50 YJ Wrangler Technical Forum 14 10-01-2010 09:48 AM
4.0 to 4.2 head swap. Head bolt questions. grimjeeperyj14 YJ Wrangler Technical Forum 3 07-06-2010 01:21 PM
Which model of 4.0 head to swap the old 258 head? budello YJ Wrangler Technical Forum 2 03-13-2010 08:35 PM
head gasket, head swap, 4.0 or stroker sailor77 YJ Wrangler Technical Forum 3 02-25-2005 04:06 PM

Posting Rules  
You may not post new threads
You may not 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 Off
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome