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Nissan pathfinder AC rattle
Posted: Fri May 28, 2021 12:00 am
by Karamhako
So I have just installed a brand new ac compressor, changed the evaporator, expansion valve and dryer. Cleaned the whole system. But the main issue is that the compressor would make rattle noise that increases with acceleration and the noise is loud. I am not sure what is causing this but I have had the car for 10 years and it has always made it. The car is a 2003 Nissan pathfinder
Re: Nissan pathfinder AC rattle
Posted: Fri May 28, 2021 6:17 am
by B52bombardier1
Bad belt idler pulley? They wear out and you should be able to isolate the noise down by changing the RPM and some careful listening.
Rick
Re: Nissan pathfinder AC rattle
Posted: Fri May 28, 2021 6:45 am
by JohnHere
Adding to what Rick said, it could also be the water pump, alternator, power steering pump, or the drive belt itself. Belts can make some odd noises sometimes. Try using a mechanic's stethoscope or a length of heater hose held to one ear to isolate the noise. Does it do it only with the A/C turned on?
I'm also curious as to why you replaced all those components and whether you did the work yourself. Does the system cool okay now?