My Jeep has taken up singing... - JeepForum.com
 
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post #1 of 9 Old 12-06-2019, 02:14 PM Thread Starter
sAe23
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1995 XJ Cherokee 
 
Join Date: Apr 2009
Location: Los Angeles / SFV
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My Jeep has taken up singing...

Hello,


I have so many new noises going on, it's spinning me right round round round round...



Two I am sure are belt and pulley squeels (Belt dressing made one go away for a while; haven't tried lubrication the pulleys yet)


One sounds like it MIGHT be my driver side wheel bearing (Varies with road speed)
Another sounds like either a sheet metal rattle, or...baseball cards in spokes kinda?? (Also varies with road speed)


But the biggie is a knocking sound coming from either the back of the engine or the front of the transmission.
I crawled under the Jeep and used a long screw driver as a stethoscope but was not able to determine the source.
It's hard to tell, but the noise seems to lessen when driving at speed.


Any thoughts?


TIA

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post #2 of 9 Old 12-06-2019, 07:52 PM
chris87xj
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XJ's like a tight belt and loose flexplate bolts can knock.

***Chris***

"You can set my jeep on fire and roll it down a hill,
But I still wouldn't trade it for a Coupe DeVille."


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post #3 of 9 Old 12-07-2019, 09:57 AM
car6car
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buy stethoscope with removable stick, so you can use it with and w/o.
I stole a toy stethoscope from my daughter, worked fine!
Or:
start video on your cellphone and move it around engine. Watch video on computer, you'll know.
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post #4 of 9 Old 12-09-2019, 05:45 PM
KF4SQB
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Describe your "knocking" sound. Is it like someone is inside your engine block beating on things with a large hammer, or more light a light metallic tapping? I had a light metallic tapping that I had trouble isolating with the method you described. I could only get as far as telling that, like you, it was near the rear of the engine/front of the transmission. In my case, it was the starter bendix. The return spring in the starter solenoid was dirty and hanging up inside the bore of the solenoid, so that it would not properly retract the bendix when the key was released. This caused the gear on the end of the bendix to lightly tap against the starter ring on the flexplate while the engine was running. Cleaning up the bore of the solenoid took care of it.

4-wheeling: because football, basketball, baseball, and golf only require one ball!


Confidence: The feeling you get just before you fully understand the situation!
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post #5 of 9 Old 12-09-2019, 11:18 PM Thread Starter
sAe23
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It's a light tapping...like a toy machine gun.
It is loud when idling in gear, and gets quieter under load.
If I can make time this weekend, I plan on checking out the flywheel/flexplate bolts, but I will scope the starter motor as well...
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post #6 of 9 Old 12-11-2019, 11:53 PM Thread Starter
sAe23
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Location: Los Angeles / SFV
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Well, my luck ran out... Thought I could make it to the weekend to fix it, but no.
The serpentine belt came OFF, intact!
Didn't feel like farting around with it on the side of a busy freeway, at night, so I had it towed to my local mechanic (Hangs head in shame).
He can get it done faster, and I've asked him to investigate the knocking sound..


This may be the last I bother
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post #7 of 9 Old 12-14-2019, 09:54 PM Thread Starter
sAe23
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So, one harmonic balancer and a new belt later and the squealing is gone.
As for the knocking, the bell housing to block bolt, next to the starter motor, was GONE!
6 to 8 weeks ago the starter motor was also missing a bolt (!!) and I SAW the open hole for the bell housing bolt but did not know something was supposed to be there
I replaced the bolt and now the knock is all but gone (still small possibility of damage t the flywheel or torque converter per a transmission shop rep).


Now I need to make time to tighten the exhaust flange as I can rock the down pipe back and forth ...
(It.Never.Ends!)
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post #8 of 9 Old 12-17-2019, 12:25 PM
KF4SQB
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Location: SouthWest Georgia
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Quote:
Originally Posted by sAe23
(It.Never.Ends!)
Always remember what "Jeep" stands for: Just Empty Every Pocket!

4-wheeling: because football, basketball, baseball, and golf only require one ball!


Confidence: The feeling you get just before you fully understand the situation!
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post #9 of 9 Old 12-19-2019, 01:52 PM
car6car
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yesterday i was chasing squeaking sound, new tensioner pulley didn't help, i will replace belt, I hope it is not bad crank pulley!

04 Grand (dead)
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