Engine for my '91 Cherokee

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07-15-2013, 08:04 PM

popcorn

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Year: 1991

Model: Cherokee

Engine for my '91 Cherokee

My straight 6/242 has seen its last battle and I now am in the process of re-building/replacing a lot of different things on my Jeep to include the engine and possibly the drive train. My question is I have access to a straight 6/258 and was wondering if I could drop that into my '91 Cherokee with the AW4 Trans?

Has anyone done this and if so is it a straight swap pull one out and drop in the other?

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07-15-2013, 09:46 PM

cruiser54

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Year: 1990

Model: Cherokee (XJ)

Engine: 4.0

Quote:

Originally Posted by popcorn

Gigantic can of worms. Find a good used 4.0.

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07-18-2013, 05:40 PM

84zmyfavorite

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Model: Cherokee

Dont put Entire 258 into your Cherokee, only Part of it. Use 258 Crank and Rods with 4.0 pistons for a Stroker. Well Worth it, if done right. Go Low Buck and use the Factory Cam and lifters, then you wont have to worry about valvetrain problems.

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07-18-2013, 10:38 PM

kirknd4spd

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Model: Cherokee

Quote:

Originally Posted by 84zmyfavorite

X2, rebuild the 4.0 and stroke it. Or just rebuild the 4.0 without stroking it if you would rather do it that way.
Regardless, I'd keep a 4.0 in it, its a lot of work swapping engines.