Help identify that sound...

jelwell1982 · **Joined:** Mon Aug 15, 2011 9:53 pm **Posts:** 26

This is the only way I can think of to identify the sound short of forking over the $95 diagnostic fee the dealership wants or the $49 the local shop wants...
The Jeep is a 2008 Liberty with 53,000 miles.
The noise started at the tail end of a road trip a few weeks ago. It may be accompanied by a small coolant leak.
You can disregard the video if you like and listen to the rattley groaning noise.
Video is at normal idle at normal operating temps, no AC turned on.

<iframe width="425" height="349" src="http://www.youtube.com/embed/LAPxNAL1Szc?hl=en&fs=1" frameborder="0" allowfullscreen></iframe>

Or the link:

http://www.youtube.com/watch?v=LAPxNAL1Szc

Thanks!
Jeremy

JeepinJarhead03 · **Posted:** Thu Aug 18, 2011 9:07 pm

digital video/audio and it's limited capacity for audio frequencies

have you checked the belt tensioner for it flopping around? remotely it sounds like that when they go bad

jelwell1982 · **Joined:** Mon Aug 15, 2011 9:53 pm **Posts:** 26

yes the audio is a bit difficult but it gives the general idea of the noise I'm hearing I hope.
I think we are on the same page though.
I just double checked the tensioner and it has no wobble.
BUT looking down on the belt the only pulley that seems to have any wobble/vibration is the waterpump pulley. It is slight, but it is there none the less. Is this normal?
I was leaning towards waterpump due to the small coolant leak to begin with.

JeepinJarhead03 · **Posted:** Thu Aug 18, 2011 9:35 pm

is this "small coolant leak" look like it's coming from under/behind the water pump?

like, stick your finger under it and feel around.. WITH THE ENGINE OFF..

see if ya end up with antifreeze on your finger

there's a weep hole in the housing underneath, when the water pump starts trashing it'll start weeping antifreeze

jelwell1982 · **Joined:** Mon Aug 15, 2011 9:53 pm **Posts:** 26

It hotter than hell under there still. BUT with minimal burning on my finger tips I could tell It is wet around the lower gasket. The stamped numbers on the bottom are visible moist. Under/inside the pulley is dry. 1 lower bolt head is wet. anything above the waterpump is dry.

JeepinJarhead03 · **Posted:** Fri Aug 19, 2011 12:57 am

pop the belt off and rotate the pump by hand wiggle the pully back and forth and see if it wiggles the pump shaft

i have suspicions that you found your noise

jelwell1982 · **Joined:** Mon Aug 15, 2011 9:53 pm **Posts:** 26

Cudos to you jarhead!
Pulled the belt, found a lot of slop in that pulley.

I must say Jeep didn't do too bad of job designing this guy either it wasn't nearly as bad as I expected removing it.
I simply drained all the coolant out of the petcock valve. Removed the battery, removed the horn. Removed the coolant/washer fluid reservoir. Removed the fan/fan shroud(nice this was one piece). And too my surprise I didn't have to turn the alternator or the AC compressor or the power steering pump. 8 bolts and it was out. Their was quite a bit of wobble in the shaft.
I will purchase the new one tomorrow, and hopefully re-installation goes just as smooth.

thanks again for the help Jeepinjarhead03

Jeremy

Help identify that sound...

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