4.2 to 4.0 head swap valve lift questions? - JeepForum.com

 
LinkBack Thread Tools
post #1 of 2 Old 07-29-2010, 02:38 PM Thread Starter
grimjeeperyj14
Registered User
1990 YJ Wrangler 
 
Join Date: Sep 2009
Location: Northampton, PA
Posts: 229
4.2 to 4.0 head swap valve lift questions?

What is the desired valve lift for the 4.0 head when swapped onto the 4.2 block? I put a rebuilt 1991 4.0 head on my 4.2 block. It has a new (stock) cam/lifters and I put 1991 4.0 pushrods in. It came up with 0.075" inch lifter preload so I put a .030" inch spacer and the final preload came to 0.030" inch. What should my valve lift be?


Driving my Jeep is uncomfortable, loud and drafty.... and I love every minute of it
grimjeeperyj14 is offline  
Sponsored Links
Advertisement
 
post #2 of 2 Old 07-29-2010, 10:14 PM Thread Starter
grimjeeperyj14
Registered User
1990 YJ Wrangler 
 
Join Date: Sep 2009
Location: Northampton, PA
Posts: 229
Any suggestions?

Driving my Jeep is uncomfortable, loud and drafty.... and I love every minute of it
grimjeeperyj14 is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.



Email Address:
OR

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
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Jeep Forums Replies Last Post
4.0 to 4.2 head swap. Head bolt questions. grimjeeperyj14 YJ Wrangler Technical Forum 3 07-06-2010 02:21 PM
4.2 to 4.0 head swap questions Timmy69 YJ Wrangler Technical Forum 6 04-07-2010 04:11 PM
4.0 to 4.2 head swap questions bigrobby YJ Wrangler Technical Forum 3 02-16-2008 01:08 PM
Head Swap questions Wood Butcher YJ Wrangler Technical Forum 1 04-21-2005 06:30 PM
4.0 Head Swap - Valve Cover acejeep YJ Wrangler Technical Forum 1 03-09-2004 05:55 PM

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 Off
Pingbacks are On
Refbacks are On

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