Jeep Wrangler Forum - Reply to Topic
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > TJ Jeep Wrangler Forum > TJ Tech Forum > a 4.0 engine rebuild

Join Wrangler Forum Today


Thread: a 4.0 engine rebuild Reply to Thread
Title:
  
Message:
Post Icons
You may choose an icon for your message from the following list:
 

Register Now

In order to be able to post messages on the Jeep Wrangler Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

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.



Additional Options
Miscellaneous Options

Topic Review (Newest First)
07-02-2014 12:52 AM
hgoodwiniii Hi all. I am looking for someone to help put a stock cam in my 1997 4.0L Grand Cherkoee. No luck in the ZJ forums. Does anyone know any do it yourselfers in the Houston, Texas area that I can contact for hire that may interested? Thanks.
06-19-2013 10:38 AM
tailhole Two things I dont like about the pistons is they don't have pressure oiled pins and they use the 5/64 rings instead of the 1.5
06-18-2013 09:47 PM
tailhole What sucks about this 4.6 I'm trying to build now. Is I keep selling my blocks I have. But I rather have the cash. Still got to make a living.
06-18-2013 09:43 PM
tailhole It's there ICON brand.
It's a forged piston not that other crap with the KB name.

I have used this brand a few times they seem fine. I will put then at the same level as like probe. But for a shelf piston and for no more than what I need them for there more then nice enough.

I'm work out doing another that looks like I'm going to offset grind the crank .090 and use a 2in small G Chevy rod at 6in long and bore it 4in.

The only thing is, looks like im going to have to put 6 flange sleeves in it.
06-18-2013 01:54 PM
Gunner Are those KB's. That looks like a nice piston. Gas expansion cut on the ring land and the pin is not in the oil ring. Full quench band too. Been waiting for you to post more goodies.
06-18-2013 08:47 AM
tailhole Finally got off my butt and ordered my pistons



Attachment 263007
06-04-2013 08:48 AM
tailhole If it runs fine just leave it.
06-04-2013 07:59 AM
Higany8 Hey guys, I just purchased a 99 Sport 4.0 with manual. what can I expect? Any major issues? what should I check for and what should I replace? I do immediate oil changes on every car I buy but this is my first jeep. Thanks.
03-11-2013 10:14 PM
Gunner Yeah thats what I said. At how many inches of vac? Check it out.
Jeep 4.0 / 4.7/ 5.0 performance race head
03-11-2013 09:16 PM
tailhole 300!!!!
Dang.
03-11-2013 08:23 PM
Gunner Nice. I saw some flow numbers for a 2.5 stroker head with 2.02 and 1.6. Intake number was 300 cfm. Didn't give any lift or other numbers. I have heard that the 2.5 is based on the 4.0 head. Man I miss this stuff.
03-11-2013 03:44 PM
tailhole Ferrea #s

2.0 in f6199
2.020 in f6285

1.6 ex f6272
1.625 ex f6286
03-11-2013 03:23 PM
tailhole 6.1 Hemi ex valve will work. And the stock size is 1.6
03-11-2013 11:55 AM
Gunner I miss the high tech stuff more than anything else. In that respect retirement sucks. I loved to go into the shop and do little things to my motors late at night. My wife would come in at 3am and find me porting a manifold. LOL those days were fun.
03-11-2013 08:26 AM
tailhole Funny you said that. I got a mower last summer that can mow at 12 mph. Haha
03-11-2013 01:21 AM
Gunner LOL knowing your builds you could mow an acre in 10 minutes when you were done.
03-10-2013 08:22 PM
tailhole
Quote:
Originally Posted by Gunner View Post
You can have a lot of fun for not a lot of money. Start easy. Rebuild a lawn mower engine. Learn the basics. If you have the basics you can learn the rest as you go.
You got me thinking of my first rebuild. And it was a lawn mower. I must have been 12-13 years old. No telling how much money I made with it on weekends and summer time
03-10-2013 05:51 PM
Gunner You can have a lot of fun for not a lot of money. Start easy. Rebuild a lawn mower engine. Learn the basics. If you have the basics you can learn the rest as you go.
03-10-2013 12:06 PM
jonathan75
Quote:
Originally Posted by tailhole View Post

To just put one together, ring compresser and torque wrench
Thank you. All those fancy tools with analog dials look $$$. I want to do a rebuild for fun and education but don't want to invest in a lot of tools only used once or twice.
03-10-2013 09:22 AM
tailhole
Quote:
Originally Posted by jonathan75 View Post
Do you have to test new spring pressure or should it be in spec out of the box? What is the most crucial specialty tools needed for a engine rebuild?
To just put one together, ring compresser and torque wrench
03-10-2013 09:19 AM
tailhole I did check retainer to seal, and can't remember. It was stupid, like 750-8 or something
03-10-2013 09:00 AM
tailhole I don't use Teflon anymore. They were the latest and greatest years ago.

Valves need oil.
Just like oil restricters, I don't like them or use them. I never understood why you would want to cut oil off to the heads.
What's funny, and I got in a heated confertaion with a big engine builder, is

Why cut the oil down to the heads then run a oil line to the head to spray oil on the springs. He said cus the spring would get hot and the EXTRA oil helped cool it.

I said. No shit? Then I couldn't stand it anymore. What a dumb ass. Haha
03-10-2013 08:51 AM
jonathan75 Do you have to test new spring pressure or should it be in spec out of the box? What is the most crucial specialty tools needed for a engine rebuild?
03-10-2013 04:39 AM
MGHDTi Man, I have so much respect for the knowledge you all have. Can barely understand what you're all talking about, but I could read it all day none-the-less. Subscribed
03-10-2013 03:42 AM
Gunner HAHA I was just gonna say that is one serious spring compressor. I had a smaller one. Had the tips all welded for strength. It was as ugly as a cows backside but it worked sweet. How much retainer to seal do you have when you do a high lift cam? I like the seals you chose. Vitons? They let in just enough oil without starving it long term like the white Teflons do. And it looks like they fit the stock guide OD.
03-09-2013 12:17 PM
tailhole Don't make fun of my spring compressor,
Gunner.

It's all I have right now. My small one tore up.
This one will do 1000lb and it did these springs just fine. Haha
03-09-2013 12:14 PM
tailhole And the springs are own and the head is done.



Attachment 220216
03-09-2013 12:09 PM
tailhole I'm using Elgin springs
Rv-1278s


Attachment 220212
03-09-2013 12:07 PM
tailhole Check spring hight



Attachment 220210


And spring pressure



Attachment 220211
03-09-2013 11:56 AM
tailhole Setting stem hight


Attachment 220206
This thread has more than 30 replies. Click here to review the whole thread.

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


All times are GMT -5. The time now is 05:06 AM.



Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC.
Wranglerforum.com is not in any way associated with the Chrysler Motors LLC