stroker in an 04

[skydizzle]

hey guys, ive read tons and tons of threads and forums on strokers, but i still cant find the answer im looking for. I have an 04 wrangler with a 4.0 that threw a rod, so its not rebuildable, so Im looking for another engine to put in there and figured i might as well stroke it. MY questions is, can i use a long block out of say an older XJ or Yj or something like that? Ive found used XJ engines for cheap, but for anything 02 and newer its always super pricey. If I use the long from that can i use my intake and everything from my stock 2004 4.0? heres what im going for right now.

4.6L Low-buck, low CR "rockcrawler"

Jeep 4.2L 3.895" stroke crank
Jeep 4.2L 5.875" rods
Silvolite UEM-2229 +0.030" bore pistons
Increase piston dish volume to 30cc
8.75:1 CR
CompCams 68-115-4 192/200 degree camshaft
Ported HO 1.91"/1.50" cylinder head
Mill block deck 0.035"
Mopar/Victor 0.043" head gasket
0.058" quench height
Ford 24lb/hr injectors with stock 39psi FPR for '87-'95 engines, stock injectors with stock 49psi FPR for '96 and later engines
240hp @ 4700rpm, 315lbft @ 3000rpm

[unlimitedrubicon]

Hello,

The block externally will be quite different and too much work to convert over. I have an '05 so I know what you mean about the price of a block. Your machine shop should be able to get one for you for about $300 though, ask them what their price is.

[SilverXJ]

I could have sworn I answered the same question elsewhere in the past month.

But, no. You can not use an XJ or ZJ engine. What you need is a 1999+ WJ block or a 2000+ TJ block.

[skydizzle]

awesome, thanks for your help guys.

[MalevolentChewy]

A good machine shop should be able to fix almost any problem as long as it is not split in half...I stroked my 2001 after the piston exploded at 4k rpm while the rod and wrist pin stayed intact. So from 4k rpm to 0 rpm in a matter of a second or two there were 4 long gouges in that cylinder the whole legnth of the stroke that went into the water jacket. We thought the engine was no good after that, but our machine shop was able to bore it out and put a sleeve in it. It's not the cheapest thing to do, but it will most likely be cheaper than a new block. Thought I would give you another option to look into.