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Old 07-21-2012, 07:06 AM   #1
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Engine Swap?

Hey Guys... I've got a '92 4 cyl with a warped head (from overheating) and am trying to figure out if I should put a 6 cyl in or just have the head replaced. Anyone have any info on either option (i.e. approx cost to replace the head, approx cost for a used 6 cyl and cost to have it installed)? I should probably put a new clutch in if I replace the engine so cost for that as well. Thanks for any words of wisdom!
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Old 07-21-2012, 01:08 PM   #2
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This is just a rough estimate.

4cyl...new head about 300-350..gaskets and install about 800-1000 total.

4cyl complete motor(new) 2500-3000...install about 4000 total

6cyl change over...depending on if you can find a donor vehicle to get all the parts you would need...

6cyl needs: new frame towers welded in, different bell housing, different trans, and drive shafts.

if you went with new parts for a 6cyl swap, you would be looking at 6000-8000 complete total install...if you can find a donor vehicle for all the parts that you need, that would be your cost plus labor.

most garages in this area charge anywhere from 60-85/hr for labor(dont know what it is in your area)...but you are looking at 6-8 hrs for the head replacement....and somewhere around 15-20 hrs for a 6cyl swap. You do the math.

You cant afford to have a 20 something year old machine if you are going to pay someone else to work on it, unless you are pretty much independently wealthy. Just my opinion.

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Old 07-21-2012, 01:33 PM   #3

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If you're gonna go for a 6, go for an 8. Should be about the same cost to do the swap in (as the process is the same, only the parts differ) and then you'll have more power at around the same cost.
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1991 YJ 99 Vortec 5.7L, SM465, NP205, 14 Bolt Rear, Dana 60 Front, 5.13 Gears, Detroit Lockers, 395/85R20 46" Michelin XML tires on 20" XD Wheels, Cherokee Offset Springs (10" front to back stretch total), Bilstein 5150s, 1in. BL, custom cage, Warn M8000, Double D Dash/OHC, 4Low Front Stinger Bumper, DirtWorx Rear Bumper WTC, Tube Fenders, Comp Cut, 1 Ton HD Kingpin High Steering and PAID FOR.
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Old 07-21-2012, 01:55 PM   #4
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Get the head planed at a machine shop, they can also do a valve job too. Total cost should be about $150. If you can take the head off and reinstall it yourself Which is really a pretty easy job, DO IT!! Having a warped head is no reason to replace a motor.
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