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post #1 of 6 Old 12-28-2011, 01:28 PM Thread Starter
beefcake3
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1998 TJ Wrangler 
 
Join Date: Sep 2011
Location: 47.4689 N, 87.8883 W
Posts: 126
I LOVE my ****** jeep

in the process of rebuilding my 2.5l 4cl engine to replace the piston rings due to lack of compression iv figured out the problem is that my engine block has been bored before by a previous owner and has oversize pistons but the god damn retard didnt put larger rings on so now at 130k on the engine and having to be re bored because the small rings chewed groves into the cylinders. iv had the damn thing for about 6 months and have only driven it about two weeks of that time the only reason i just dont light the ****er on fire is because other then the engine everythings been replaced by a previous owner its basically a brand new 98 TJ.

QUESTION:
can my block be re bored or will i need a new one????

CYLINDERS:
http://www.jeepforum.com/forum/f176/...-help-1305626/

PISTONS:
http://www.jeepforum.com/forum/f176/...ation-1305969/

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post #2 of 6 Old 12-28-2011, 01:42 PM
roadyrob
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1987 YJ Wrangler 
 
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your pistons are .030 over, you can bore up to .060. should be able to rebore if the groves aren't to deep. the shop you take it to will know

Do everything with a positive attitude, it won't always work but you'll piss enough people off to make it worthwhile.

the voices aren't real but they sure have good ideas.
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post #3 of 6 Old 12-29-2011, 02:25 PM
Siva283
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1995 YJ Wrangler 
 
Join Date: May 2011
Location: Falling Waters
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There is a guy on here that went to .120 over and used flat head chevy pistons and it worked fine. As far as I know he still has it. It is actually a 2.8 now I think. He gained like 25 horse power or something too.
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post #4 of 6 Old 12-30-2011, 02:18 AM
Prot
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2014 JK Wrangler 
 
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Location: Lafayette
Posts: 7,986
Maybe consider an engine swap to 4.0L

2014 JKU Copperhead Pearl
Too many mods to list. Too awesome to sell.
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post #5 of 6 Old 12-30-2011, 04:42 AM
Siva283
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1995 YJ Wrangler 
 
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Quote:
Originally Posted by Prot View Post
Maybe consider an engine swap to 4.0L
It seems to me that the OP does not want to go to the trouble and headaches of an engine swap. Some of us are fine with our 4 cylinders. Other than picking up speed a little slower and towing more weight our 4 cylinders can do anything the 6's can.
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post #6 of 6 Old 12-30-2011, 05:36 AM
Prot
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It was just a suggestion that opens up possibilities.

I used to know a guy with a four cylinder that had tires too big for the power and I suppose gearing. His Jeep had a top speed of 40 mph as a result.

The possibility of salvaging the engine will largely depend on how bad the damage is and the cost of the repair. Has the crankshaft sustained any damage from the metal shavings or anything?

2014 JKU Copperhead Pearl
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