auto ac noisy compressor pulley bearing

Auto a/c noisy compressor pulley bearing.

Auto A/C noisy compressor pulley bearing.

It is vital to properly diagnose the  automotive ac system. An auto ac noisy compressor could be caused by an internal damage or could be something simple as a noisy compressor pulley bearing. According to Denso: 99.9% of all compressor problems are not related to product failure, but from a poor understanding of A/C system operation, maintenance and repair.


Noisy Compressor clutch, bearing failure.

Automotive a/c compressor clutch bearing failures are usually caused by system problems and not the bearing itself. Replacing the noisy bearing without finding the root of the problem and fixing it permanently will only lead to premature damage of a new component and a waste of time and money.

Excessive heat could be the cause of a noisy compressor or compressor bearing failure.

Excessively high temperature and lack of lubrication are the biggest enemies of any automotive a/c compressor pulley bearings. Slipping compressor clutches can generate temperatures as high as 1,200 degrees Fahrenheit; this tremendous amount of heat will quickly melt down the bearing seal. The bearing loses its grease and in the process, before it locks up completely it gets rough and noisy.

How to prevent excessive heat and pressure in the car a/c system.

Several factors could cause the ac system to build up excessive heat all of them with the potential of damaging a compressor pulley bearing or locking up the whole hvac compressor. Leaking air conditioning systems will leak out refrigerant and the oil that resides inside of the compressor creating a huge frictional resistance between the compressor piston and the cylinder leading to an increase in compressor internal temperature.

Overcharged or improperly vacuumed auto ac systems will create high system pressures and therefore high temperatures. Compressor pressure plate and rotor pulley excessive air gap will cause slippage and rise in temperature.
In the other hand another issue related to bearing lubrication is the contamination of the bearing grease. A leaking compressor shaft seal could cause the compressor oil to find its way into the hvac compressor clutch bearing contaminating the grease. The properties of the bearing grease will be changed by this oil contamination causing it a poor compressor bearing lubrication and inevitably internal bearing failure. In some cases seals, compressor shaft and bearing could share the same enemy, heat.

A/C compressor factory bearing defects won’t need more than a few hours of compressor operation to become evident. Rarely the bearing itself is the culprit. For an affordable, comprehensive and very convenient ac service call Auto A/C Repair. We are the auto ac repair always near to you with competent ASE certified technicians that will check up you car ac right at your place for free.

Do you need assistance diagnosing your noisy ac compressor ?

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