Mechanics

I AM HEARING A SQUEAL COMING FOR ENGINE COMPARTMENT, THINK IT IS A BELT, BUT MY RPMS ARE HIGH.

1994 Mazda Miata

This morning I had the heater on and heard the squeal but it stopped when I turned the heater off, now it is a constant sound.
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MazdaRick
February 9, 2012.




ON MANY NEWER CARS, THE A/C AND THE HEATER (USING A SETTING WITH DEFROST MODE) TURNS ON THE A/C CLUTCH, THUS TURNING TURNING THE COMPRESSOR.

OF COURSE THE A/C SETTING WOULD COOL THE INTERIOR OF THE VEHICLE. THE DEFROST USES THE EVAPORATOR TO REMOVE MOISTURE FROM THE HEATED AIR BLOWING ONTO THE WINDSHIELD, DEFROSTING IS FASTER THAN IT USED TO BE IN OLDER CARS.

IF USING A HEATER SETTING THAT DOES NOT USE DEFROST, SEEMS TO GIVE NO PROBLEMS, THIS MIGHT LET YOU POINT YOUR FINGER TOWARD A BAD A/C COMPRESSOR

IT MAY BE THAT EITHER THE A/C COMPRESSOR IS LOCKING UP (REPLACE) OR THE A/C CLUTCH MAY BE GOING BAD (REPLACE)

REMOVING YOUR BELT AND TURNING ALL PULLEYS WITH YOUR FINGERS MAY ALSO FIND ANOTHER PULLEY NOT TURNING FREELY

THE INNER CENTER PORTION OF THE A/C PULLEY IS PART OF THE A/C CLUTCH---NOT ONLY TURN THE PULLEY, BUT SEE IF THE INNER PART WILL TURN TOO, IF IT DOESN'T, THE COMPRESSOR IS MOST LIKELY BAD

KEEP US POSTED

THE MEDIC

CJ MEDEVAC
Feb 9, 2012.


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