2000 Altima - hissing, grinding, clank sound when idle
2000 Altima, over 350,000 miles.
Been less than a month since I welded up the rusty flange on the cat. Last weekend. I took the car for a 500 mile trip.
Coming back, I heard a grinding, tinkling sound while idling at the light. I thought maybe my welding job had broke and the cat was hissing again.
Went under the car with engine running to see if I could feel exhaust escaping from the seem.... Nope. Seems OK!
Popped the hood and hear a hissing, grinding noise coming from the belts with occasional tinkling bell sound... maybe near the alternator. All belts seem to be moving. When stopped, all the belts seem tight. Not sure about the pulleys.
I didn't have much time last night, but I got my long handled screwdriver to "listen" for where the sound was coming from.
It was more pronounced coming from the AC compressor. I was hoping for just an idler pulley to be replaced.
I'll jack it up this week and remove the passenger wheel and splashguard to see if I can loosen the belt(s). My intent is to:
- Check the idler tension pulley to see if that is where the grinding is from (bad bearing?)
- AC Clutch pulley (bad bearing)
- AC compressor (bad compressor?)
I haven't had function AC for a few years now. I had previously tried replacing sensors around the evaporator.
I was going to replace the in-cabin air filter this spring and see if maybe there might be a mouse nest in the evaporator. When the AC stopped working the AC would sputter and spew water at the floorboard on the passenger side. I have blown out the drain hole and seen a ton of liquid come out. Also, the AC seems only work when temps are below 80F outsid3e. That's why I replaced the sensor.
I suspect a rodents nest in there. Maybe it's the AC compressor/clutch?
Last edited by BillHoo; Apr 3rd, 2017 at 09:34 AM.