I hear this noise on many Caravans - friends and while stopped at red
lights - when idling it makes a noise sort of like a squeak - sort of
like a whistle - like metal against metal - two knives rubbing against
each other I heard it described as once. Give it a little gas and the
noise goes away. Otherwise engine runs fine. 3.8L.
Been searching the net for similar threads...some say tensioner some
say water pump...my water pump was replaced a year ago...noise has been
there for several years and I want to get rid of it! When thread I saw
said to be careful spraying libricants near the serpentine belt.
Any help will be greatly appreciated. Thanks.
Another comment - I once had a tensioner go bad - bearings went out and
the tensioner came off - just laid inside the engine comparment - while
on the interstate! First symptom was lost power steering! Don't want
to get stranded like that again.
I can't speak to the 97 with 3.8, but I had 2 things causing squealing noise
on my 92 with the 3.0. Used to squeak and squeal most all the time, but
especially when it was humid...I just lived with it...high mileage vehicle,
what are you gonna do? :-)
At around 162k, the head gasket went out...while fixing that up, one of the
things they replaced was the timing belt tensioner...got quieter!
Later, I was doing what little mechanic work I could attempt to do and
replace the O2 sensor. While under there, I noticed that the serpentine
belt had slipped a notch. Took it in to my mechanic, and they replaced the
belt and tensioner...wow, even quieter!
Now at 185k, it's still quieter than ever (if you ignore that tapping valve
or whatever it is) :-)
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