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Old 11-03-2015, 06:27 PM
  #1  
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Year: 1996
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Engine: 318 5.2 liter
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I have a engine knock, it sounds like it may be coming from the lower end of the motor. Its a 96 Jeep Grand Cherokee 5.2 v8, it has 108000 miles on it, I bought it used so I'm not sure how the maintenance was of the vehicle from the previous owner. The knock sounds as if you take a hammer to the block and hit about every 10 seconds up to a minute, untill it reaches operating temp. Its only one single knock at a time and doesn't sound like lifters you cant really make the sound happen it does it intermittently . I put stp additive in it which made the noise stop. I know its not fixed, just masked. Does anyone have anything of the the same issue or possibly the cause and a fix thanks much appreciated.

Last edited by jp1017; 11-03-2015 at 11:13 PM.
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Old 11-03-2015, 06:56 PM
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Engine: 4.0
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If you pull one plug wire off at a time and the knock disappears it will tell you if it's in that cylinder indicating a rod bearing is bad. Other than that I'd pull the pan and start checking mains and rod bearings before it craps out on you and tears up more stuff.
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Old 11-03-2015, 08:19 PM
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Thanks I appreciate the advice, I will try that and hopefully see a fix there or at least be closer to one. Hopefully a cheap simple fix but my luck probably not. SMH.
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Old 11-04-2015, 09:20 AM
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x2 drop the pan. dirty job, but my far the easiest way to get a look at the lower end
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Old 11-05-2015, 06:09 PM
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Well I really hate to replace the motor, its 3 grand for a rebuilt motor. Still havent been able to figure out the knock noise yet......
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Old 11-07-2015, 05:31 AM
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Old 11-09-2015, 11:54 AM
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1550, is not a bad price. Thanks for that.
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Old 11-09-2015, 03:19 PM
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$325 shipping to my door.

Thanks from me as well.
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Old 11-09-2015, 06:49 PM
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👍
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Old 11-09-2015, 06:49 PM
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Welcome!!
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