More weird Noises :(
More weird Noises :(
so latley whenever i have the a/c on i hear a hard grinding type noise when i accellerate when i am just crusing its fine and if the a/c is off no noise at all
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Towncivilian
- Posts: 4868
- Joined: Sun May 23, 2010 10:21 am
- Car: 2001.5 Nissan Pathfinder SE 3.5L 2WD A/T
2007 Nissan Altima 2.5L CVT
2012 Nissan Sentra 2.0L CVT Special
2012 Infiniti G37 Sedan 7A/T - Location: Florida, USA
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Re: More weird Noises :(
Check the compressor belt, if worn replace it. If not, your compressor may be low on oil or refrigerant. Get it evacuated & filled properly at an A/C shop. If that doesn't help, your compressor is probably dying.
Re: More weird Noises :(
Working on the AC pump is expensive, that pump is also variable by that it delivers various loads as to the swash plate that moves to increase and decrease the size of the cylinder. A small cylinder produces less than a larger cylinder.
At warm up temp start the AC, put the inside temp to the coldest temp setting. Hood up, use your hands ears and eyes.
With the motor running, AC on RPM should be higher than 750. Are the belts noisy, squeaking, rubbing, fraying, vibrating in the mid portion close to centre between pulleys?
Is the actual pump making noise, is its main pullet and the clutch assembly rotating quietly or are they chatter boxes?
Listen to all the pulleys while spinning, use a stethoscope or solid long screwdriver, pressed to your ear, the noise may be painful to hear but without touching the surrounding area with a solid piece you will not really know. The bearing within may be good but dry, so you may have to remove the shields and re-grease the bearing.
All pulleys need a closer hear and look at.
While driving the RPM increases with the engine, so rev the engine wile in P and e brake is on, does the noise get worse, can you pinpoint where it is coming from?
It should be cold in the car, is it?
If the actual pump is noisy or gets noisy then have it looked after, any work on the pump will require a freon capture, diss-assembly, repair, assembly, e vac, test for leaks re pressurization of freon and oil, re test then payment.
Variable pumps are good but expensive to repair or replace. If the noise is from belts, pulleys or clutch then no freon work is needed but mechanical things and bearings. An old drive belt can make noise check them out and while replacing the belt(s) clean the sheaves or pulleys first.
At warm up temp start the AC, put the inside temp to the coldest temp setting. Hood up, use your hands ears and eyes.
With the motor running, AC on RPM should be higher than 750. Are the belts noisy, squeaking, rubbing, fraying, vibrating in the mid portion close to centre between pulleys?
Is the actual pump making noise, is its main pullet and the clutch assembly rotating quietly or are they chatter boxes?
Listen to all the pulleys while spinning, use a stethoscope or solid long screwdriver, pressed to your ear, the noise may be painful to hear but without touching the surrounding area with a solid piece you will not really know. The bearing within may be good but dry, so you may have to remove the shields and re-grease the bearing.
All pulleys need a closer hear and look at.
While driving the RPM increases with the engine, so rev the engine wile in P and e brake is on, does the noise get worse, can you pinpoint where it is coming from?
It should be cold in the car, is it?
If the actual pump is noisy or gets noisy then have it looked after, any work on the pump will require a freon capture, diss-assembly, repair, assembly, e vac, test for leaks re pressurization of freon and oil, re test then payment.
Variable pumps are good but expensive to repair or replace. If the noise is from belts, pulleys or clutch then no freon work is needed but mechanical things and bearings. An old drive belt can make noise check them out and while replacing the belt(s) clean the sheaves or pulleys first.
Re: More weird Noises :(
As above -- check the belt. They need to be quite tight on the pathfinders
Then it could be the bearing in the clutch of the compressor -- or the friction material in the clutch is worn down. Lastly it could be the bearing or other internal part of the compressor.
Some of the clutches can be replaced economically -- but often the cost of the clutch replacement is too high to bother with - especially on a high mile vehicle that may then have a compressor failure.
Then it could be the bearing in the clutch of the compressor -- or the friction material in the clutch is worn down. Lastly it could be the bearing or other internal part of the compressor.
Some of the clutches can be replaced economically -- but often the cost of the clutch replacement is too high to bother with - especially on a high mile vehicle that may then have a compressor failure.