Yousuf said:
Okay, so a leaking CV joint would result in a lower-pitched noise than
what I'm hearing?
It's definitely coming from the wheels and not the engine. The noise
doesn't occur until the car starts moving.
Which means there is more torque on the drive belt when the power
steering pump gets used. You later mentioned in another post that the
sound is heard more during turns. As the car warms up, so does the belt
along with no longer being positioned at its stretch marks around the
pulleys. My guess is a warmed up drive belt has more grip than a cold
one. Also, due to heat expansion of the engine and change in
positioning of the components around which the belt moves, the belt will
tighten up as the car warms up (but might take 5 to 20 miles before it
tightens up based on how long you idle, RPM, outside temperature, city
versus highway driving, etc). My mother's car need a new drive belt and
it squeals, even more so during turns, until a few miles have been
driven.
So how old is the fan belt? What are the extremes in outdoor
temperatures during that time (i.e., summer versus winter)? Any
contaminants get on it (engine oil, coolant, been splashing through
puddles, etc)?
The fan belt replacement you can do yourself and its a cheap repair and
may even be needed if the belt is old. Don't rely looking at the belt
anymore looking for cracks or chips in the ribbing as some compounds
won't show that despite the belt is worn and stretched. You could check
the deflection of the old belt and see if tightening it up eliminates
the squeak but I'd suggest going with a new belt in the first place.
If this is a rusting brake caliper, what can I do to lubricate it?
WD-40? Silicon or Lithium Grease? Etc.?
You would need to replace the dried out seal around the piston is that's
the cause. That means a caliper overhaul which you probably don't have
the equipment, parts, and expertise. The fact that you think WD40 or
other lube is going to get rid of a brake squeal pretty much indicates
you don't know how brakes work and you don't know how to repair them.
Some shops will burnish the slider rod if it has rust on it (mine get
rust rings because it sits for months unused). The pads don't move
(except with the caliper which is sliding on the rod. I'd suggest
taking it in for a brake inspection if you think it's a brake problem.
Then you can find out which shops are willing to do some minor repairs
yourself and which ones just want to slap in a whole new caliper and
charge you lots of money.
There is another cause of a squeal (although I've usually heard it as a
groan): a pebble stuck between the disc and dust shield. This can
actually burrow a groove into the disc which can exceed the depth a shop
is allowed to turn a disc. In the past, you could probably turn (lathe
down) a disc 2 or 3 times. Once is about all you get nowadays and
probably won't fix a groove caused by stuck gravel wearing against the
disc - but then just removing the gravel eliminates the noise (but not
the groove that lets water get in between the disc and pad).