Stroker buildup. - 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 > Stroker buildup.

Introducing MONSTALINERô UV Permanent DIY Roll On Bed Line~Artec JK 1 TON SWAP~Advance Adapters SYE Kits

Reply
Unread 02-08-2006, 01:10 PM   #1
Mateo94XJ
Registered User
 
Join Date: Sep 2004
Location: Chicago IL
Posts: 851
Stroker buildup.

Hey guys, maybe you can help me. The 4.0 is shot in my XJ, thanks to years of neglected maintenance by the original owner. I found a motor to drop in for the meantime, and I can take the original motor out and rebuild / stroke it.

Sicne the 258 and 242 are so closely related, could I buy a master rebuild kit for a 258 and then put it into the 242?

Are the cams any different in these two motors (my gut says yes)?

LET THE DISCUSSION BEGIN.

__________________
'94 XJ Sport 2dr.
'86 MJ
'42 Willys MB
Mateo94XJ is offline   Reply With Quote Quick reply to this message
Unread 02-08-2006, 05:15 PM   #2
gumcrew2
Registered User
1991 XJ Cherokee 
 
Join Date: Oct 2004
Location: Denver, CO
Posts: 1,184
I wouldn't be a master rebuild kit because you can do it cheaper than those kits. I built a high budget stroker but here's a break down of how to build a good cheap stroker

4.0L engine (you already got one)
258 crank, comes with rod and main bearings ($300 shipped on ebay)
258 connecting rods ($125 shipped on ebay)
piston rings ($50 shipped on ebay)
gasket set ($75 at autozone)
have a shop press the pistons to the rods ($50)


that's it, if you were to spend more, I would recomend getting the block bored, you can get a set of new pistons on ebay, in almost any overbore size, for $150 shipped

after that I'd get a cam and lifters, you will probably need new valve springs though.


o yea, get the cam bearings replaced, pay a shop to do it, it's a PAIN in the ***.

I have no idea if they had different cams.
__________________
"Nitrous? So is that like viagra for your Jeep?" -mom

"I flopped it"
gumcrew2 is offline   Reply With Quote Quick reply to this message
Unread 02-08-2006, 07:43 PM   #3
Bgeddes
Ridin' with the King
 
Join Date: May 2005
Location: NEPA
Posts: 1,179
Check out:
http://www.jeep4.0performance.4mg.com/stroker.html
Everything from simple to crazy.

As far as finding a 258 crank and rods, my local U-pull-it sells complete motors for $100. I am planning on buying 1 each 4.0 & 258 for my stroker build. I believe your best bet for a master rebuild kit would be the 4.0 HO. You will need to let the machine shop clean and check your 4.0 block & 258 crankshaft prior to ordering the kit. You might need oversized pistons and or bearings. The strokers pretty much straight 4.0 parts except for the crank and rods. Lots of cam options, one of setups on the page above uses a stock 4.0 HO cam, and late model injectors.
__________________
'05 KJ CRD and '00 XJ Classic > Stock DDs
'88 Grand Waggy - Bone stock pseudo-barnfind
Bgeddes is offline   Reply With Quote Quick reply to this message
Unread 02-09-2006, 12:41 AM   #4
Mateo94XJ
Registered User
 
Join Date: Sep 2004
Location: Chicago IL
Posts: 851
Oh I know that doing cam bearings is a complete pain, been there tried not to do that. It's real nice when you have the tools.

I hadn't thought about buying a u-pull-it motor and running that, that's interesting.

I know I'm going to have to do machine work on my 4.0 block, this one is dying (leaking like a sieve and very low compression on cyl 5&6) due to probably broken rings, so at the least an overbore and hone would be needed. I've got a good reputable shop to do the machine work, so that takes care of that.

Thanks for steering me away from the master rebuild kit, I now understand.
__________________
'94 XJ Sport 2dr.
'86 MJ
'42 Willys MB
Mateo94XJ is offline   Reply With Quote Quick reply to this message
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.
Note: All free e-mails have been banned due to mis-use. (Yahoo, Gmail, Hotmail, etc.)
Don't have a non-free e-mail address? Click here for a solution: Manual Account Creation
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.


Thread Tools


Suggested Threads





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.