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Old 08-13-2016, 05:55 PM
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Rebuild or replace 3.7l

I'm new to the forum here, also new jeep owner as well. So I came across a deal on a repo 05 jeep grand Cherokee laredo, at first I couldn't run it because the starter was out, after I bought it ($675), I replaced the starter and was able to get it to start, but sounded really bad. So compression test confirmed cylinder 1 was dead. So now I'm trying to figure out which would be more beneficial and cost effective, buy a used engine or rebuild the one I have. I haven't pulled the engine just yet, probably going to tackle that in a week or so, and see how extensive the damage is. But I plan on keeping this jeep, and using it as a daily driver etc...so anyone have experience rebuilding one of these? There's plenty of rebuild kits that can be had for under $800, but there are also used engines that can be found for around $1200 to $1400...

So what is your guys opinions on the situation I'm in? Where would you go from here?

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Old 08-14-2016, 11:08 AM
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Re: Rebuild or replace 3.7l

Do you get any warrentee on an engine from USD 1200?
I would tear down the engine first and see how extensive the damage is. Maybe the damage is such that you will need a new engine.
If its not too bad and the rest of the engine looks good, i would rebuild it.
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Old 08-14-2016, 11:34 AM
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Re: Rebuild or replace 3.7l

Warranty for the used engines ranges from 30 days to 90 days depending on who you get them from....Yeah I'm going to try to get it pulled this week, if not I'm on vacation next week and I'll definitely get it pulled then, and then I'll see what the damage is..
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Old 08-14-2016, 12:53 PM
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Re: Rebuild or replace 3.7l

There are other considerations such as clutch and pressure plate if a manual.
Is it drive able enough to assess other possible failures that could end up chasing the thing from one end to the other? How are the brakes, suspension, trans, drivetrain? How are the rubber parts?
How much would it cost to buy a good used reliable vehicle that can be assessed for its actual value, compared to having a parts car? Even at $675 that's a cheap parts car but if you can't assess what your headed into you could end up with twice its value or more really fast.
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Old 08-14-2016, 01:29 PM
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Re: Rebuild or replace 3.7l

I could put the all the plugs back in it and fire it up and make sure the trans engages, but I'm not sure I can do much else with it, without causing more unrepairble damage to the engine...everything else looks good though, no rust on any of the suspension, hell while I was under it changing out the starter the block still looks nice, didn't look like anything had been leaking or anything...
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Old 08-14-2016, 01:46 PM
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Re: Rebuild or replace 3.7l

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Originally Posted by CRU1Z3R View Post
I could put the all the plugs back in it and fire it up and make sure the trans engages, but I'm not sure I can do much else with it, without causing more unrepairble damage to the engine...everything else looks good though, no rust on any of the suspension, hell while I was under it changing out the starter the block still looks nice, didn't look like anything had been leaking or anything...
I got ahead of myself, my bad. I checked out Kelley blue book and its holding up better than I anticipated which makes a big difference. You have a lot of room to do some repairs and mods.

Like you said naturally I would try to repair if feasible. My second choice would be a used salvage with low miles and depending on where it was hit. What's the rebuild warranty and is it a known reliable source?
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Old 08-14-2016, 01:53 PM
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Re: Rebuild or replace 3.7l

The rebuilder would be myself, so I would be the one that I would cuss at later when something goes wrong lol...but first things first gotta get it pulled and see what's what inside...then I definitely know what I'm getting myself into...
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Old 08-14-2016, 02:08 PM
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Re: Rebuild or replace 3.7l

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Originally Posted by CRU1Z3R View Post
The rebuilder would be myself, so I would be the one that I would cuss at later when something goes wrong lol...but first things first gotta get it pulled and see what's what inside...then I definitely know what I'm getting myself into...
Keep us posted and know we're here for you if we can help. If I can't do something constructive I can at least keep the beer cold for you. Don't forget we could always use some more pictures of your project.
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Old 08-14-2016, 02:09 PM
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Re: Rebuild or replace 3.7l

Sure thing! I appreciate that, I thought I might start a build thread...but I'll keep ya updated!
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Old 08-17-2016, 10:11 AM
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Re: Rebuild or replace 3.7l

I've ordered a bore scope should be here by friday, I've taken off the front bumper and other things that were damaged in a minor accident the previous owner had

This is what it looked like at the place where it was being auctioned off at

After getting it towed home

Driver side window was busted by previous owner

And I'm not really sure how this happened


But I went ahead and started taking all the broken stuff off the other day

I dont know if this is going to pose a big problem with a new bumper or not, but I'm going to see if I can beat it back into some what of shape it was in before...if not may cut it off and get another piece from a donor wk and weld it on...


I'm going to be installing a cai so I went ahead and took the old box out...anyone know what this box is attached to the air box? It seemed to be holding vacuum when I took it off..


The passenger front headlight had a few broken mounts as well, I went ahead and took it off, I'm getting replacements anyway...but this is how she sits at the moment...been waiting on the rain to let up, it's rained here almost everyday, and once I get my bore scope in I'm going to look down in the engine a little bit, and then start pulling it out...I have my vacation next week but also have a minor surgery procedure as well, hopefully I can get it pulled out before the surgery...


So would you guys advise me to go ahead and put the plugs back in and try to run it and engage the transmission??? I want to do it just to make sure I'm not going to shoot myself in the foot after I get the engine back in and the trans is bad...I may just leave out the #1 cylinder plug so it doesn't fire just to get it to run and engage the transmission...thoughts???
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Old 08-17-2016, 10:34 AM
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Re: Rebuild or replace 3.7l

I think you will be safe as long as it is not knocking at the bottom end.

You can get a new aftermarket bumper reinforcement. (It is welded on right?) The best quality aftermarket parts will come from a body shop and it will save a bunch over OEM. Mark up is normally 30%, maybe you can negotiate 20-25% since all they're doing is ordering the parts. They won't have to touch it so maybe they'll go for it. Then compare used parts with new aftermarket to get your best deal on the rest of it. If you get really lucky you might find used front and rear bumpers already blue. New parts will come in raw black plastic and have to be painted.

You may want to pull the windshield so you can work out the roof dent without stressing and breaking the windshield. Most glass companies will come to you and if the molding is set in the windshield urethane the glass company can bring a new molding for around $20. There will probably be a reinforcement under the windshield and front roof so you may have to borrow a stud welder to pull up the dent if you can't get access from the headliner.

Your Jeep is going to look nice. That's a sharp color. Best of luck. You're going to have a nice ride.
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Old 08-17-2016, 11:59 AM
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Re: Rebuild or replace 3.7l

Yeah I'm keeping an eye out at the local salvage yards for bumpers but I see where I can get new ones fairly cheap...and I thought about plastidiping the whole jeep, but not sure yet..

Thanks for the info though I appreciate it!
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