Is it worth rebuilding my 1990 4cyl? -
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post #1 of 5 Old 10-10-2012, 12:01 AM Thread Starter
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1990 YJ Wrangler 
Join Date: Sep 2012
Location: corpus christi
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Is it worth rebuilding my 1990 4cyl?

I just bought my first yj with a carb'd 4 cyl and it runs fine but with a tick that ive narrowed down to a worn piston bearing. If i'm going to fix that i mine as well just rebuild from the ground up. Is it worth it or I could upgrade to a 6 cyl which would be more work and a lot more money but better performance. what are some ballpark estimates on how much that costs to do the whole swap?

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post #2 of 5 Old 10-10-2012, 01:16 AM
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1994 YJ Wrangler 
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Location: Ripon
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Depends on how good you are at finding bargains and haggling

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post #3 of 5 Old 10-10-2012, 09:56 AM
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1980 CJ5 
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Location: pennsylvania
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I did my 4.0 auto swap for nothing, maybe even made a little. but I am cheap and my jeep wasnt my dd so it could sit in the garage for a while. If you like the 2.5 just rebuild it. You can buy a running xj with a 4.0 in it cheaper than rebuilding a 2.5 but its a lot more work putting the 4.0 in.
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post #4 of 5 Old 10-10-2012, 11:09 AM
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1989 YJ Wrangler 
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Location: Sin City
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2.5 overhaul was $1200 from Nevada Valve Train and odds and ends cost me anothe $400 to complete everything. If I had the opportunity I would do the swap. Go find the donor and get everything lined up for the swap and then program the downtime to swap over. There are a lot of good engines sitting in the yards that can go in there.
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post #5 of 5 Old 10-10-2012, 11:11 AM
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1998 XJ Cherokee 
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Swap in a V8. Would be cheaper than rebuild with better performance than 4.0.

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4 cyl , 6 cyl , rebuild , swap , YJ

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