rods, crank, and procedure questions

Newbies, and basic Stroker Recipes... Get started with your first stroker here!!
Post Reply
Electric Stooge
Posts: 3
Joined: October 15th, 2012, 11:17 am
Vehicle Year: 2000
Vehicle Make: Jeep
Vehicle Model: Cherokee

rods, crank, and procedure questions

Post by Electric Stooge »

ok, so here is my issue that im fixing. I got a tick and I believe its rod slap due to the last time I had the pan off and one of the rods moved on me.
So im planning for the worst here and seeing what parts Ill need to do a bottem end stroker because i dont see a point in just returning it to stock.

so here is my questions
1. could i just replace that rod and put in a 4.2 crank shaft?
2. can i do all this from the bottom with out removing the head?
3. would this actually give me a power gain
4. if I only wheel once a month and i do still try to get decent gas milage out of it, should i find a 4cw or 12cw crank?

current engine is a jasper 243 rebult thats out of warentee in a 00' xj auto
Thanks in advance
User avatar
Cheromaniac
I live here
I live here
Posts: 3086
Joined: March 8th, 2008, 12:58 pm
Stroker Displacement: 4563cc
Vehicle Year: 1992
Vehicle Make: Jeep
Vehicle Model: Cherokee
Location: Cyprus
Contact:

Re: rods, crank, and procedure questions

Post by Cheromaniac »

At a minimum you're going to need a 258 crank with new rod/main bearings for the HO block. The question thereafter is how to complete the stroker bottom end. You could either keep your existing 4.0L rods and add a set of IC944 pistons, or buy a set of 258 rods with some cheap stock replacement pistons. Either way, the rod big ends will need to be checked for roundness and a set of ARP 112-6001 rod bolts will be good insurance.
With the stroker bottom end complete with reused stock cam, you could just bolt your existing cylinder head assembly onto it.
1992 XJ 4.6 I6 - 5MT - Stroker build-up, Stroker "recipes" Sold
1995 Mustang GT - 4AT - Modded Sold
2006 Mustang GT - 5MT - Modded Midlife Crisis Car :mrgreen:
Electric Stooge
Posts: 3
Joined: October 15th, 2012, 11:17 am
Vehicle Year: 2000
Vehicle Make: Jeep
Vehicle Model: Cherokee

Re: rods, crank, and procedure questions

Post by Electric Stooge »

yeah, i wasn't going to change cams, and If i need to take the head off, I would minimum check the valves were seating properly.

but from what your saying, I couldnt use the 4.2 crank with both the 4.0 rods and pistions, i would have to change out one of them?
User avatar
SilverXJ
Global Moderator
Global Moderator
Posts: 5789
Joined: February 14th, 2008, 7:14 am
Stroker Displacement: 4.6L
Vehicle Year: 2000
Vehicle Make: Jeep
Vehicle Model: Cherokee
Location: Radford, Va

Re: rods, crank, and procedure questions

Post by SilverXJ »

Correct. The 258 crank needs to be used with the 258 Rods & 4.0L pistons OR 4.0L rods and Icon, Bulltear or other custom pisotns
Electric Stooge
Posts: 3
Joined: October 15th, 2012, 11:17 am
Vehicle Year: 2000
Vehicle Make: Jeep
Vehicle Model: Cherokee

Re: rods, crank, and procedure questions

Post by Electric Stooge »

oh, dont know how I missed that in research.....
That probally would have ended in a bad mistake, so thanks!
User avatar
Cheromaniac
I live here
I live here
Posts: 3086
Joined: March 8th, 2008, 12:58 pm
Stroker Displacement: 4563cc
Vehicle Year: 1992
Vehicle Make: Jeep
Vehicle Model: Cherokee
Location: Cyprus
Contact:

Re: rods, crank, and procedure questions

Post by Cheromaniac »

Electric Stooge wrote:oh, dont know how I missed that in research.....
That probally would have ended in a bad mistake, so thanks!
You wouldn't have missed it if you'd read this page: ;)

http://www.jeep4.0performance.4mg.com/stroker.html
1992 XJ 4.6 I6 - 5MT - Stroker build-up, Stroker "recipes" Sold
1995 Mustang GT - 4AT - Modded Sold
2006 Mustang GT - 5MT - Modded Midlife Crisis Car :mrgreen:
Post Reply

Who is online

Users browsing this forum: Google [Bot], Semrush [Bot] and 1 guest