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Unread 04-05-2010, 11:56 PM   #1
sloan95yj
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1995 YJ Wrangler 
 
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95 yj 2.5L to a 4.2L built 258

I am building a 258 to swap in to my 95 yj, bored 60 over, 2 barrel webber, compcam, ported head, I havent got it back from the machine shop yet. Everyone really knocks the 4.2 why???i know originally it made less hp then the 2.5L but more torque, now it will make more hp and alot more torque< also swaping in the AX15 for the Ax5.. heavy 10 inch cluch, Im gonna upgrade to a 35inch swamper when i get the build done. My bigest concern is will it pass emissions? ALL COMENTS WELCOME!!!!

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Unread 09-20-2013, 08:44 PM   #2
TURBO95YJ
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I can't believe nobody's ever posted anything on this, I was thinking about doing the same swap. Are the motor mounts the same as the 4.0
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Unread 09-20-2013, 08:46 PM   #3
TURBO95YJ
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Oh and is the location of motor mounts the same as the 4.0
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Unread 09-21-2013, 02:23 AM   #4
Tom95YJ
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thanks for digging up a old thread !

if you have to run emissions you wont pass per EPA guidelines the engine must be of the same year or newer

so if you have a YJ with anything newer then a 90 you wont pass with a 4.2L
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