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Case of the missing piston

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Old Mar 25, 2012 | 12:06 AM
  #1  
poorstang's Avatar
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From: Richlands VA
Year: 1997
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Engine: 4.0
Default Case of the missing piston

Earlier in the year I made a thread of my jeep breaking down and now I got a chance to get the head pulled off and I found this and I'm trying to go over in my head what I should do find a block and stroke it or go back to stock what to do that is the question.
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Old Mar 25, 2012 | 12:08 AM
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Sorry pics didn't load
Attached Thumbnails Case of the missing piston-image-430350305.jpg   Case of the missing piston-image-3434680861.jpg  
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Old Mar 25, 2012 | 12:10 AM
  #3  
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From: New Hampshire
Year: 1998
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Engine: 4.0L I6
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How the hell did you "lose" a piston?
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Old Mar 25, 2012 | 12:14 AM
  #4  
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It broke apart and is in the oil pan. To beat it all it was running when I took it apart granted not very well but still kicking on five cylinders lol
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Old Mar 25, 2012 | 02:16 AM
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From: loveland co
Year: 1987
Model: Cherokee
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Ouch! If you are not racing I would just stay stock.
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Old Mar 25, 2012 | 02:37 AM
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Year: 1989 xj sport 2dr
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Engine: 12 hole bosch Injectors
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Originally Posted by ike1
Ouch! If you are not racing I would just stay stock.
x2 and getting another piston in there will feel like its been stroked.
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Old Mar 25, 2012 | 08:11 AM
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From: Waskom, Texas
Year: 2001
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If it only gouged the cylinder wall you can have the block sleeved and install a new piston. You can do just one hole or as many as you want.

How bad did it beat up the head?
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Old Mar 25, 2012 | 08:29 AM
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Originally Posted by ETexas XJ
If it only gouged the cylinder wall you can have the block sleeved and install a new piston. You can do just one hole or as many as you want.

How bad did it beat up the head?
No sleeving a 4.0 block
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Old Mar 25, 2012 | 08:33 AM
  #9  
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From: Waskom, Texas
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Originally Posted by N20jeep
No sleeving a 4.0 block
Really? Never heard that before. Then again I never tried.
Thanks for the info.
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Old Mar 25, 2012 | 08:52 AM
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From: lewisberry PA
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As long as the block is useable i say bore it 4.2 crank and rods, have the head cleaned, 3angle valve job, clean the ports up, put some manifolds on, an bigger t.b. add fuel and have fun
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Old Mar 25, 2012 | 09:08 AM
  #11  
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Year: 1987
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If you plan to rebuild it you might as well stroke it. The stroker parts are mostly the same price. as they are stock parts as well. The small extra cost is worth the horsepower and torque. It's what I plan to do to my tired 4liter with 305k
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Old Mar 25, 2012 | 09:55 AM
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From: Fauquier County, Virginia
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V8! That's what I'm doing when my 4.0 gives the ghost... or when I get the funds. And YES a V8 can be done on the same budget as a well built stroker and you will actually get slightly better mpg with more power to boot.

And I know someone is gonna argue my point, but Lord knows I have put much research into this decision, and there are many v8 swap threads that prove it can be done.
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Old Mar 25, 2012 | 11:01 AM
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From: Nor-Cal Coast
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Hate it when that happens. Once (Chevy) it ruined the block, once (International), it didn't. Then I discovered @@@@@-oil! I put a 350 in my Jag because the 6 that was in it was ****. Wouldn't even think of changing the 4.0. Might even put my 265K 4.0 into another body, it literally took apart the first one. (No rust, just disintegrating).

On the chevy I removed the wrist pin & rod remnants from the crank, loosened the rockers for #3 and drove almost 100 miles home on 5 cyls.
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Old Mar 26, 2012 | 03:41 PM
  #14  
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From: Richlands VA
Year: 1997
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Are all 4.0 blocks the same?
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Old Mar 26, 2012 | 04:59 PM
  #15  
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Originally Posted by 1991Jeep_Man
V8! That's what I'm doing when my 4.0 gives the ghost... or when I get the funds. And YES a V8 can be done on the same budget as a well built stroker and you will actually get slightly better mpg with more power to boot.

And I know someone is gonna argue my point, but Lord knows I have put much research into this decision, and there are many v8 swap threads that prove it can be done.
I will agree having built a stroker myself, a V8 swap is slightly more, depending on your skill level, available tools etc, as determines what will have to farmed out.
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