Auto Air Conditioning compressor. How it works.
Video Rating: 4 / 5
So the shaft does not ride on any bearings internally?
Good video, but does the front plate have a bushing or some typr of roller
bearing where the shaft comes out?You did not show that to close or mention
At 3:58 you can see the front housing bearing real good and if you look in
the background at 4:20 you can see the bearing in the rear housing. This
allows the center shaft to spin and it directly connected to the front
Also, I found acouple videos on here that show acouple Mazdas making exact
noise mine is and the owners swear it is the compressor bearings.Either the
pulley bearing or bearings inside compressor,but I’m not convinced yet.
thanks-We bought this car two years ago and the belts were brand new on the
car.Shortley after owning it is when the screeching noise started.One thing
I did notice is that the crank pulley, A/C pulley were coated/impregnated
it seems in a rust colored dust.The belt is also impregnated with this.The
clutch assy.had this coated on it and I had cleaned this off.I tried to
clean it off the pulleys but it would not come off the pulleys.Any way I
could clean it off the pulleys and belt?
Screeching is almost always the belt. Either it is glazed over and or
Ok- got it.Just trying to figure out my problem.03 Mazda protege.Air is
cold and compressor works fine.Have this on again off again screeching
noise when the car is started and getslouder when put in gear.Turning on
air or even heat makes it louder.Ruled out the alt. and it’s
belt.Tightenening the A/C and pwr steering belt seems to help quiet it.Do
not think it is the pwr steering pump.Comp. pulley vbearing feels ok, but I
am suspecting it is making the noise since it turns all the time.
When the bearing is going out it will make a constant rumble/grinding
sound. You can hear it better if you remove the belt and spin the AC clutch
pulley by hand. I would think the rust colored stuff on your belt is spray
belt rejuvenation. When you get a screeching belt you can go buy a $3 can
of belt anti slip/rejuvenation. It lasts for a couple weeks but the belt
will start squealing again. I’m sure this is what someone did. Fine sand
paper will remove it from the pulleys.
Internal bearings going out is very rare and the would only rumble really
Thanks for all your fedback.I think I can rule out the internal bearings
.Just wondering if you don’t mind watching a video here on the Tube.It is
called Mazda 626 A/C compressor bearing noise I believe.See what you think
it is.The sound this car makes is identical to my Mazda.Guy thinks it is
bearings and someone told him to put oil in the compressor.I think he’s
Ok-Your help greatly appreciated.It’s amazing how someone told the guy his
bearings are bad in the compressor!When I bought my car it had two new
belts on it that is why I was not leaning towards a belt at the time.It
started to make the noise not long after I go it.It does make the noise
without air on and gets worse when the car is put in gear which would make
sense since the belt is under heavier load.Does the glazing of the pulleys
of what you said is the Belt spray need to be addressed?
His belt is slipping or his electric clutch is slipping but my money is a
burnished belt. You can try cleaning the clutch by spraying it down good
with “brake parts cleaner” but a new belt will solve the issue.
Ther was alot of dust on the clutch.That is what I thought it was.The
bearing does not runble at all,feels smooth.Could it be the internal
bearings on the compressor?Not sue if they would schreech and Squeell?
Maybe that is why tis problem is intermittent and hard to track down, since
the belts were new when I got the car.Maybe a combination of the pulley’s
and belt.Whats weird is the other night when driving down the road and the
heat was turned on it started to screech.Not sure why turning the heat on
Lightly sanding the pulleys with 120 or higher grit will remove glazing and
contaminants from pulleys. Once a belt is glazed over from slipping it is
Our 2002 Sienna has a humming noise when the A/C is turned on. No noise
when the A/C is off. Any ideas what the problem could be?
The AC compressor turns on with the Defrost setting to cycle the
refrigerant during the cold months. This keeps everything lubricated in the
thanks-I do appreciate all your feedback.I did know that.It is my daughters
car.Not sure if she had it on the defrost setting when she said that.I do
know I have a alt. starting to go.Ripple is high on it an lights dimming
and blower fluctuating, so I have to tackle that job also.those look to be
a pain to pull!
Do you hear it under the dash, inside the car or under the hood? Does it
make the same sound with the heat on? What about with the defrost setting
why does it save fuel to run the engine without aircon?
The AC compressor requires a lot of force to turn it. It puts a load on the
engine so the engine has to use more gas to run.
Yeah, there’s quit a bit of thing going on inside.
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