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Unread 11-10-2013, 05:43 PM   #1
wj_runner99
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fix piston rings vs. new/used engine?

I haven't done a compression check yet but all signs are pointing to blown piston rings. My question is would you rather tear it down and fix it or just replace the engine? I'm thinking about price, time, and how much of a pain in the @ss each will be. Give me your thoughts and opinions.

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Unread 11-10-2013, 05:52 PM   #2
michiganmaveric
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What eng are we talking about, 4.0 or 4.7? What are your symptoms? Could be a lot of things besides the rings.
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Unread 11-10-2013, 06:02 PM   #3
wj_runner99
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It's the 4.7l. Has around 180-200,000 miles. Lots of blue smoke from the tail pipe. Running extremely rough and barely stays running at all. The Obd was throwing a p0203 code which is number 3 injector circuit malfunction. That code is now gone after new plugs but still runs like Crap.
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Unread 11-10-2013, 06:12 PM   #4
michiganmaveric
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Options= rebuild yourself, pain in the a**, have a shop rebuild it for you-probably around $3000, find a used 4.7 and drop it in $????. One big question is, is the body and under carriage and interior worth the cost of repair.
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Unread 11-10-2013, 07:11 PM   #5
wj_runner99
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Jeep overall isnt too bad. Couple of dents a little rust. Interior is perfect except one wear spot on drivers door. I only paid $2000 for her and she's never broke down on me until now. I've had it for three years and have only improved on her. Monet is really tight right now and financing a car is out of the question.
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Unread 11-11-2013, 07:57 AM   #6
Cirruslydakota
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I'd say if it isn't your primary vehicle rebuild it yourself if you've got the means to do so. You'll save some coin and building engines is fun. I'm biased however as thats what I do for a living.
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Unread 11-12-2013, 05:36 PM   #7
zombie54
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IT probably has a hole in a pistion like mine did. Its a pretty simple fix but im a mechanic. it only took about a day put new pistons in and honed the cylinders new bearings.... Presto runs like it did new. all depends on what is really wrong with it. that would be my first step. good luck
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Unread 11-12-2013, 08:31 PM   #8
wj_runner99
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I still haven't done the compression test. The guy I was going to borrow it from still hasn't brought it over. So I will be buying a tester tomorrow. Anyway I found a rebuild kit for $445 off eBay. Complete piston set all the rings gaskets and timing chain. It's a better price then I thought it would be so I think that is my best bet. So wish me luck bc it will be the first rebuild that I have ever done. Pending if that's what it needs or not obviously.
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