weird knock from motor
05-20-2009, 01:15 PM
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Year: 89
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weird knock from motor
i have a weird knock from the motor at idel it sounds like its a rod or something moving around in there . theres about 240000 miles on it.
and now the serpentine belt is just locking up until you rev the motor a bit
and now the serpentine belt is just locking up until you rev the motor a bit
Last edited by 89roke; 05-20-2009 at 01:57 PM.
05-20-2009, 01:37 PM
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Year: 89
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240k
that doesnt sound like a lifter tick it sounds more from the bottem end and has a deeper noise then the ticking of the lifters
not to sure if it goes away when its warm ill have to check that
that doesnt sound like a lifter tick it sounds more from the bottem end and has a deeper noise then the ticking of the lifters
not to sure if it goes away when its warm ill have to check that
05-20-2009, 02:49 PM
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Year: Sold my 1991 to go to school for 2 years.
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Engine: 4.0L
check the torque converter to flexplate bolts. They have a habit of backing off and making knocking noises that sounds like the bottom end of the motor is coming apart. The flexplates can crack too so check for cracks when you are checking bolts for tightness
05-20-2009, 03:51 PM
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and for the stroker thats what i wanna do when i park the jeep for the leaf spring swap
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05-20-2009, 04:19 PM
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05-20-2009, 04:37 PM
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when it was squealing i poped the hood and the belt wasnt turning at all
but ill try to take it off and check that too
but ill try to take it off and check that too
05-20-2009, 04:40 PM
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When you have the belt off (its really not hard to get off), try spinning all of the pulleys to make sure that the bearings are ok. If you find any that feel like they are grinding or wobbly, it could be why the belt is locking up and could (probably a long shot) be where your knocking noise is coming from as well. Depending on which pulley bearing is f-ed, it can make lots of noise.
05-20-2009, 10:11 PM
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My motor had a pretty good rod knock to it at idle and at some RPM ranges, it's been like this for a while. I currently have 213k on it, I changed the oil tonight and put in 20w50 oil the rod knock is almost not even noticable at all RPM ranges.
Sounds like you need to address the belt issue first. Then I would pull the inspection cover on the bell housing and make sure all the torque converter bolts are tight (if you have an auto trans)
Sounds like you need to address the belt issue first. Then I would pull the inspection cover on the bell housing and make sure all the torque converter bolts are tight (if you have an auto trans)
09-06-2010, 07:18 AM
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Year: 97
Model: Cherokee
Engine: 4.0
My motor had a pretty good rod knock to it at idle and at some RPM ranges, it's been like this for a while. I currently have 213k on it, I changed the oil tonight and put in 20w50 oil the rod knock is almost not even noticable at all RPM ranges.
Sounds like you need to address the belt issue first. Then I would pull the inspection cover on the bell housing and make sure all the torque converter bolts are tight (if you have an auto trans)
Sounds like you need to address the belt issue first. Then I would pull the inspection cover on the bell housing and make sure all the torque converter bolts are tight (if you have an auto trans)
X2 on thicker oil, Lucas makes a great product called Heavy duty oil stabilizer. Add a quart to your oil it will quiet knocks and raise oil PSI. Add it to your diff to stop howling. Add it too your t-case to stop the noises and make it shift smoother. I can keep going...
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