How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Tim Mohr Your Own Question
Tim Mohr
Tim Mohr, ASE MASTER TECH
Category: Nissan
Satisfied Customers: 560
Experience:  30 YRS EXPERIENCE, FOREIGN AND DOMESTIC, GAS AND DEISEL
17454363
Type Your Nissan Question Here...
Tim Mohr is online now
A new question is answered every 9 seconds

My maxima's ac stopped cooling today and when I open the

Customer Question

My maxima's ac stopped cooling today and when I open the hood when the engine is idling I hear an intermittant sound a bit like popcorn popping/metalic knock.
Submitted: 1 year ago.
Category: Nissan
Expert:  Jay replied 1 year ago.

Hi, My name is*****'m happy to help you. During our conversation, I may be presenting you with different things to try, and ask you some Questions to get a better understand of the issue so I can answer your question properly. So stick with me to the end, and I am sure we should be able to get this issue resolved for you!

If you turn the Ac off, does the noise stop?

Customer: replied 1 year ago.
Thanks for help. No, when I turn the AC button off inside the noise still happens. It also does not seem like is coming from the AC compressor but under it somewhere in the middle of the vehicle.
Customer: replied 1 year ago.
AC has been fine but suddenly stopped cooling this afternoon on my drive home.
Expert:  Jay replied 1 year ago.

Any chance you can take a video clip of the noise so I can hear it?

Customer: replied 1 year ago.
great idea...give me a second.
Expert:  Jay replied 1 year ago.

ok..

Customer: replied 1 year ago.
uploading now. Had to record it then get on my pc. You will hear the engine and if you listen careful you will hear the rattle noise/knocking low noise off and on. https://www.dropbox.com/s/fa2yu3ml2v9e9dv/2015-08-03_21-18-47_164.wav?dl=0
Customer: replied 1 year ago.
it would not let me upload it
Customer: replied 1 year ago.
hit the link to my dropbox link to that file. Is talking an extra $18 on top of the $20?
Customer: replied 1 year ago.
you will have to turn your volume up and listen carefully.
Expert:  Jay replied 1 year ago.

hold on..

Customer: replied 1 year ago.
Were you able to listen to it?
Customer: replied 1 year ago.
Thanks. Our messages crossed.
Expert:  Jay replied 1 year ago.

I hear it. I thought I would be able to see where you are filming as well. But that is ok I guess.

If you are standing over the engine, does it sound like it's more on the passenger side towards the front?

Customer: replied 1 year ago.
I would say more passenger side but nearer center of engine towards the dash side. Really hard as an amateur to work out where.
Customer: replied 1 year ago.
Do you think the noise is related to the failure of the AC cooling today or something totally different?
Expert:  Jay replied 1 year ago.

Ok. But the engine is outside the car, not inside correct?

Expert:  Jay replied 1 year ago.

It could be.. I am trying to determine that..

Customer: replied 1 year ago.
The engine is in the engine compartment....regular 2009 Nissan Maxima.
Customer: replied 1 year ago.
I can do a video if that is needed.
Expert:  Jay replied 1 year ago.

yeah.. Move the video around also. Even go under the front of the car if you can on the passenger side..

Customer: replied 1 year ago.
k
Expert:  Jay replied 1 year ago.

Give me a few .. Need to take the dog for a walk.. brb. Take your time

Customer: replied 1 year ago.
okay with you in a second.
Customer: replied 1 year ago.
I was definitely louder listening underneath the car.
Customer: replied 1 year ago.
internet a little bit slow.
Customer: replied 1 year ago.
I will have two links. One from the above, one from below.
Customer: replied 1 year ago.
taking forever to save these. Do you have an icloud email I can use for photo sharing?
Customer: replied 1 year ago.
I restarted the upload...working now..sorry.
Customer: replied 1 year ago.
Are you still with me?
Customer: replied 1 year ago.
I am having a lot of problems (unusual) trying to upload the files to dropbox. one last try now.
Customer: replied 1 year ago.
here goes - file 1 - https://www.dropbox.com/s/1kk9rafvy5ur6vc/File%20Aug%2003%2C%209%2057%2007%20PM.mov?dl=0
Customer: replied 1 year ago.
2 https://www.dropbox.com/s/nf28eb2j6e41moc/File%20Aug%2003%2C%2010%2003%2036%20PM.mov?dl=0
Expert:  Jay replied 1 year ago.

Sorry, Hang on..

Yes I am here

Customer: replied 1 year ago.
The links should work. I tried them.
Expert:  Jay replied 1 year ago.

got 1 hang on

Expert:  Jay replied 1 year ago.

I keep listening to it over and over...

Customer: replied 1 year ago.
I know it is pretty odd.
Customer: replied 1 year ago.
I never /rarely open the hood. It could have been doing this for a while and I only noticed tonight when I opened it when troubleshooting the AC issue.
Expert:  Jay replied 1 year ago.

Damn.. That noise is odd...

Expert:  Jay replied 1 year ago.

Part of me thinks it's a broke up Catt knocking around..

Expert:  Jay replied 1 year ago.

Just trying to determine if it's related to the AC issue...

Customer: replied 1 year ago.
117,000 on the clock. Guess anything could start to go.
Customer: replied 1 year ago.
Only me and my father in law (he owned it out of the dealership) have owned it. It is well maintained.
Customer: replied 1 year ago.
ok.
Customer: replied 1 year ago.
Fan runs inside the car with air blowing warm, I hit the ac button and it seems to increase a little bit flow wise but now cooling.
Customer: replied 1 year ago.
no cooling sorry.
Expert:  Jay replied 1 year ago.

I must be going on 10 times..... watching and listening..lol

Customer: replied 1 year ago.
appreciate you looking into it.
Expert:  Jay replied 1 year ago.

When you hit the AC switch, does the Radiator fans kick on?

Customer: replied 1 year ago.
No idea. Not sure if I can tell that. It is 90 degrees here..ATlanta...so it is running a lot
Customer: replied 1 year ago.
even without AC.
Customer: replied 1 year ago.
I think...not that techie on cars.
Customer: replied 1 year ago.
I need to go in about 5 mins.
Expert:  Jay replied 1 year ago.

I am starting to think you may have a AC leak and lost your freon, and that the knocking may be a Broken up Catt converter.

Expert:  Jay replied 1 year ago.

I would love it if I can just speak with you. I am sure I can give you direction needed to resolve this..

Expert:  Jay replied 1 year ago.

The first thing I would say you need to have done is to recover the freon from the AC system. See how much is in there. If there isn't enough freon, the AC won't come on. If stone hit the condensor, or a o-ring let go, the freon may have escaped which is causing your AC issue.

Expert:  Jay replied 1 year ago.

https://www.youtube.com/watch?v=rec8Rb9cDx4