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Old 05-14-2007, 09:40 PM   #1
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1989 Wrangler rattling noise in engine.HELP

Hi guys,Couple months ago I bought a 1989 Jeep 111K miles and joined the forum. The Jeep needs some work, and I am trying to do it myself.
The problem I have is this rattling noise that I thought comes from the valves. I took the valve cover off and found that it were not the valves, they were pretty tight. This noise is almost nonexistent at idle, but becomes louder with acceleration. It sound maybe like a bad bearing. I think the sound comes from somewhere underneath and resonates through the whole engine.
I am going to take the oil pan off and check on the oil pump. Please, let me know if you have a piece of advice for me. Maybe some of you are familiar with the problem.
Thank you all,
Val

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Old 05-15-2007, 10:17 AM   #2
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Sounds like a rod knocking (slapping). If the previous owner was not diligent about oil changes you may have badly worn bearings. If one of them lets go at higher speed (acceleration) it will ruin your oil pan and head. I suggest getting it checked by someone you trust.

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Old 05-15-2007, 11:12 AM   #3
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Throw some Lucas in there and drive it till it drops. You can usually pick up a used engine cheaper than you can rebuild one. There are a ton of them out there.
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Old 05-15-2007, 07:47 PM   #4
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That's what was causing my rattling. Bad bearings. Wound up replacing the motor...
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Old 05-15-2007, 08:21 PM   #5
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You can with diligence get to the crankshaft bearings and replace them. You may need to sand down the bearing surfaces on the crank itself. It is a long and tedious process, but could well save your motor and a bunch of money.
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Old 05-15-2007, 08:44 PM   #6
coilovers are damn flexy
 
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Quote:
Originally Posted by theorrminator View Post
That's what was causing my rattling. Bad bearings. Wound up replacing the motor...

I found that to be the best cure, replacing the motor, with a Chevy 350, fuel injected engine. That seems to remedy a lot of problems.........
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Old 05-15-2007, 09:08 PM   #7
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A new engine would cost ~ same price as it would cost to fix your current engine up NOT including the price of parts .. i'm with the 350 recomendation if you decide to replace it.
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Old 05-15-2007, 11:47 PM   #8
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Rattling noise

Thank a lot to all you guys who replied. I think I will follow the route you are suggesting - engine replacement later on. Today I took the oil pan off and started the jeep just for a few seconds and had a friend listed where the noise is coming from. It sounded a lot louder and to figure out exactly what is causing it, one would need to take the engine off - something I cannot do by myself - dont have equipment and enough knowledge. I just cleaned the pan ( it wasn`t that dirty, by the way), put a new gasket. A few days ago I also replaced valve cap gasket, when I was thinking that the noise is caused by the valves. I also gonna play with timing a little and probably leave it there for now.
Anyone knows how much that V8 chevy engine would cost me? And how much the installation would run me?
Thank you all in advance,
Val

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