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Old 11-30-2013, 09:26 PM   #1
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My 2.5l just threw a bearing

Well, it hasn't thrown it yet but it is banging hard enough that I have parked her on the sidelines until I can repair her.

Money is a huge issue, but I hate to just throw another used 2.5l in without making some improvements of some kind.

If you were in my situation, with money being tight, what would you do? I can probably get another worn 2.5l from a junk yard and swap it in, but I am worried about the unknown condition of that engine. I would like to drop in a 4.0l but that could get more expensive couldn't it? Are there other options that won't cost a ton?

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Old 12-01-2013, 05:00 AM   #2
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If youre not pressed for time and since you said you're short on cash. I'd say pull it puti in on a stand and rebuild it. If the crank is not trashed, bearing sets are around $100 for mains and rods. You can take your time do do it a little at a time. If you can do it yourself you'd have less then $500 in part. Sometimes you can get away with just reusing your old crank, but it's always good to to have a machine shop check. If it needs machined they can also set you up with the appropriate undersized bearings.

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Old 12-01-2013, 01:12 PM   #3
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I don't trust myself to rebuild it and I certainly don't have the tools or the space to do the work. I am hoping to use a borrowed space to pull and replace the engine but my time will be limited.

The engine still runs, so I doubt the crank is damaged. As soon as it started making the noise I babied it to the mechanic to confirm my suspicions and then babied it back home.
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Old 12-01-2013, 01:46 PM   #4
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If time and $$ is shirt I would get a used one. If you can take some time to save here is an option. https://www.sandjengines.com/Engines.../WRANGLER/1994

And if you can really just leave the Jeep and save you can always do a 350 swap or go to www.505performance.com and take a look at what they have a 2.9L (2.5l stroker)!
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Old 12-01-2013, 06:56 PM   #5
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If it's knocking the Crank Shaft needs to be reground. The question is why did it start to knock?
No oil pressure, just worn out because it has 300,000+ miles on it and been taken care of, or very late on oil change, this all can tell what all need to be replaced.
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Old 12-02-2013, 01:14 PM   #6
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It is definitely knocking on the low end. The noise was very clear at the oil pan when using the mechanics stethoscope. The odometer reads 92k, but I suspect it has rolled, especially with this damage. The Jeep is in fantastic shape so I figured the mileage could be correct, but now with this knock I am beginning to believe it has a lot more miles. The oil has been changed regularly.

I am going to start looking for used engines now. Being down one car is making life difficult for my family.
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Old 12-04-2013, 10:50 AM   #7
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I have located a replacement in a u-pull-it type yard for $500. It is already pulled and had a compression check and they guarantee it for 90 days, so I should be covered if I start it up and it turns out to have a bad bearing as well, or any other major issue.

I am going to be doing this swap in my garage. I have basic hand tools (full set of wrenches, ratchets, sockets). I will have to rent a lift. What other items, besides fluids, should I be buying for this operation? Are there any funky tools I should have on hand? Other parts I should be replacing while I have the engine out? I am thinking it will be smart to check out the clutch.
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Old 12-04-2013, 11:33 AM   #8
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$500 is to much for a used 2.5L in my opinion.
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Old 12-04-2013, 12:05 PM   #9
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Make sure the year of the engine matches yours for easy install. Pulley puller might come in handy..tune up stuff, valve cover gasket. A new clutch/pressure plate might be a good idea too.
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Old 12-04-2013, 12:16 PM   #10
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Quote:
Originally Posted by Wombat Ranger View Post
$500 is to much for a used 2.5L in my opinion.
Really? I have no idea. Compared to $1500 for a rebuilt engine it feels like a steal.

Quote:
Originally Posted by Garyk View Post
Make sure the year of the engine matches yours for easy install. Pulley puller might come in handy..tune up stuff, valve cover gasket. A new clutch/pressure plate might be a good idea too.
It is a '94. My Jeep is a '93, so they should be identical...right?

Should I pull engine and transmission as one unit? Or will realigning them be a pain?

I should get a clutch alignment tool as well.

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