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Jeep Wrangler YJ
YJ General Discussion
Options After Blown Head Gasket
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<blockquote data-quote="Walt Jaquith" data-source="post: 429902" data-attributes="member: 18654"><p>Your cheapest route will be finding a used, running 4.2 and dropping it in. However, some engine swaps are almost as economical. The cheapest one I've found is still a version of the one I did: Swapping in the engine, transmission and T-case from an early 90s S10 Blazer with the 4.3L V6 and 700R4 automatic. The reason it's cheap is that the Blazer used a variant of the yj transfer case, so your drivelines will work. So will your rear end and radiator (both are insufficient for a V8 swap). The hookup between the Chevy headers and Jeep exhaust is easy as well. I went with full rebuilds on the engine and tranny, so my project wasn't cheap (see my build thread in the other forum), but if you can find a decent running S10 and just swap it all in without touching it, that would be relatively inexpensive. Of course, those Bazers are all pretty long in the tooth too, so finding one that's good to go might be a challenge. You could also get the T-case and 700R4 from a Blazer, and put just about any GM engine you want in front of it (some would take adaptors). But that's the other plus with this particular swap: Once it's done a V8 upgrade is a bolt-in replacement for the 4.3 later if you want more power.</p><p></p><p>My 4.3 YJ is a lot of fun. It's spunky, but not excessively powered for a rig with so short a wheelbase. The 4th gear in the automatic means cruising at freeway speeds is not a problem. Honestly, you'd very likely get better mileage from a 5.3 LS engine, though. Those things are amazing, and worth looking at if you're considering a swap even if they're more work and expense.</p></blockquote><p></p>
[QUOTE="Walt Jaquith, post: 429902, member: 18654"] Your cheapest route will be finding a used, running 4.2 and dropping it in. However, some engine swaps are almost as economical. The cheapest one I've found is still a version of the one I did: Swapping in the engine, transmission and T-case from an early 90s S10 Blazer with the 4.3L V6 and 700R4 automatic. The reason it's cheap is that the Blazer used a variant of the yj transfer case, so your drivelines will work. So will your rear end and radiator (both are insufficient for a V8 swap). The hookup between the Chevy headers and Jeep exhaust is easy as well. I went with full rebuilds on the engine and tranny, so my project wasn't cheap (see my build thread in the other forum), but if you can find a decent running S10 and just swap it all in without touching it, that would be relatively inexpensive. Of course, those Bazers are all pretty long in the tooth too, so finding one that's good to go might be a challenge. You could also get the T-case and 700R4 from a Blazer, and put just about any GM engine you want in front of it (some would take adaptors). But that's the other plus with this particular swap: Once it's done a V8 upgrade is a bolt-in replacement for the 4.3 later if you want more power. My 4.3 YJ is a lot of fun. It's spunky, but not excessively powered for a rig with so short a wheelbase. The 4th gear in the automatic means cruising at freeway speeds is not a problem. Honestly, you'd very likely get better mileage from a 5.3 LS engine, though. Those things are amazing, and worth looking at if you're considering a swap even if they're more work and expense. [/QUOTE]
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Jeep Wrangler YJ
YJ General Discussion
Options After Blown Head Gasket
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