Question about 2002 Jeep Liberty

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2002 jeep liberty siren whining noise on start up

85000 miles. makes a loud whining noise on start up but eventually goes away once the engine is warm. replaced belts. any suggestons

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I had the same problem at about the same mileage. Replaced the power steering pump and the start up screaming went away! ( The Jeep's and mine!)

Posted on Dec 09, 2008

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It may be a bearing on one of your pulleys. The most often culprit is the idler pulley. Loosen belt and hand turn all of them to see if you feel resistance.

Posted on Dec 05, 2008

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1 Answer

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indicates what you suspect
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auxiliary now that really begs, a real NOUN.
really all things attached to and engine could be called auxiliary.
P./S
AC
ALT
idler there.
I guess he means the ALternator
and all ALT's do that,it's a 3phase alternator,with diodes that rectify these pulsed to pulsating DC, (noise)
the battery sucks up most this noise.. fact.

if one diode in the Alt SHORTS,OR OPENS,then NOISE GOES BALLISTIC,
I'm a radio man ( MIL and others)
car radio
ham radio
cb radio.
as you rac the engine ,the noises , a whine increases in tone.
tell you its ALT.
if ALT is OK on a SCOPE
then we add high pass filter to the radio power lead.

there are 2 paths here
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Jan 29, 2017 | 2008 Jeep Liberty

1 Answer

My 2002 Jeep Liberty is making strange noise from the middle of the engine (by where the belts are). I just had my Alternator and all the belts changed. She's not over heating and other than the loud...


steam is never normal. sorry !
use a $5 stethoscope and find object that make said noise.
or get it serviced,

i cant guess reality, not ever, that be god like.
but if you can get it to a shop and not overheat the engine
it may be ok.
but noises , can be very very serious.

the engine,.
the accessory parts can all make noise,
what makes noise is key here, and no net bunny on earth can guess it. it must be found. by a live human.

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sounds like one of your pulleys. power steering pump, altanator, ac compressor, something along those lines.

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A noise like that is somewhat serious...It could be from low power steering fluid, low transmission fluid or even the starter remaining engaged. You need to find the source of the noise right away to avoid major damage!!!

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1 Answer

Squeels at start for first two seconds


The squeeling could be from a worn belt or if oil drips on belt overnight. Replace the belt first to see if that fixes it.Good luck.

Dec 30, 2008 | 2002 Jeep Liberty

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