90yj engine into a 92? - JeepForum.com

 
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post #1 of 5 Old 08-18-2005, 08:19 AM Thread Starter
sjrider
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90yj engine into a 92?

can you use a 1990 engine in a 1992 yj and use the 1992 injection system?
are the engine blocks the same? is the head the same?

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post #2 of 5 Old 08-18-2005, 08:49 AM
laffman
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Heads are different. The '90 is a 4.2 ltr head and the '92 is a 4.0 ltr head. Blocks are the same. But from everything I've read, the fuel injection will work with either motor. But I'm still a novice on these, so I'd let the experts chime in on this one.

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post #3 of 5 Old 08-18-2005, 09:00 AM Thread Starter
sjrider
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oops,......sorry it's a 4 banger swap
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post #4 of 5 Old 08-18-2005, 09:08 AM
sjlplat
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You can do it, but it won't be legal. Legally, you must swap a newer engine into an older vehicle.
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post #5 of 5 Old 08-18-2005, 11:06 AM
jeepnguns
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Quote:
Originally Posted by sjlplat
You can do it, but it won't be legal. Legally, you must swap a newer engine into an older vehicle.
Not in all states or counties is it that way in Albuquerque. I know it is not in Cruces then again we do not have Smog checks down here. I know in California you have to swap newer and same cylinder size.

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