Extremely loud motor (? ) cycling on and off - Nissan Armada Forum: Armada & Infiniti QX56 Forums
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post #1 of 11 Old 11-22-2012, 05:02 PM Thread Starter
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Extremely loud motor (? ) cycling on and off

every once in a while I get a very loud motor or something that cycles on for a few minutes. Service dept. didn't leave it running long enough to hear it so they sent me packing. They said AC compressor is fine. Whatever it is cycles on and off evenwhen the AC is off. It's so laud that whenver someone is in my truck and they hear it the make comments like wtf is that noise.... The intermittent issues are always a pain in the rear and I have only 400 miles of warranty left so I figured I 'd see if anyone has any thoughts.
Speaking of warrany my rear differential was just replaced under extended Nissan warranty ( Vaden ) . Im thinking of re etending it.

Anyway I'm oping some of you guys may have ideas of what this could possibly be ...

Happy Thanksgiving... ( 74600 mi 2008 LE )

David

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post #2 of 11 Old 11-22-2012, 06:35 PM
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I had the same issue.. It's just the fan to cool the motor off.. Only hear it when it's super hot outside.. Mine did the same thing. They put a brand new fan on and still the same noise


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post #3 of 11 Old 11-22-2012, 08:21 PM
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Quote:
Originally Posted by davidw View Post
every once in a while I get a very loud motor or something that cycles on for a few minutes. Service dept. didn't leave it running long enough to hear it so they sent me packing. They said AC compressor is fine. Whatever it is cycles on and off evenwhen the AC is off. It's so laud that whenver someone is in my truck and they hear it the make comments like wtf is that noise.... The intermittent issues are always a pain in the rear and I have only 400 miles of warranty left so I figured I 'd see if anyone has any thoughts.
Speaking of warrany my rear differential was just replaced under extended Nissan warranty ( Vaden ) . Im thinking of re etending it.

Anyway I'm oping some of you guys may have ideas of what this could possibly be ...

Happy Thanksgiving... ( 74600 mi 2008 LE )

David
Maybe the auto-leveling pump? If you have the Big Tow package, try and determine if the noise could be coming from the rear.

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post #4 of 11 Old 11-22-2012, 09:06 PM
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Motor sound or sound like a jet plane taking off? It could be the fan like 2012platinum stated. Mine is pretty loud but I don't think its that loud during driving. can you maybe describe it in more detail?

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post #5 of 11 Old 11-23-2012, 02:29 AM
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what you are hearing, if its coming from the engine, is the HUGE REAL TRUCK fan revving up to cool the engine.

I LOVEEEEEEEEEEEEEEEEEEe that sound. it sounds like a MACK tractor when they start off from a standstill. You know you hear the truck go through like 6 or 7 gears to get the truck up to 30mph. I love that sound and its totally normal.

on the Q, sometimes from a cold start the fan will ROOOOOAAAARRRRRRRRR for a few seconds... love that sound... yes Im special...
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post #6 of 11 Old 11-23-2012, 11:05 AM Thread Starter
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Quote:
Originally Posted by marctronixx View Post
what you are hearing, if its coming from the engine, is the HUGE REAL TRUCK fan revving up to cool the engine.

I LOVEEEEEEEEEEEEEEEEEEe that sound. it sounds like a MACK tractor when they start off from a standstill. You know you hear the truck go through like 6 or 7 gears to get the truck up to 30mph. I love that sound and its totally normal.

on the Q, sometimes from a cold start the fan will ROOOOOAAAARRRRRRRRR for a few seconds... love that sound... yes Im special...
cool thanks... It's just weird that I'm noticing it now after having the beast for 4 years.... :eek:

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post #7 of 11 Old 11-24-2012, 06:53 AM
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yeah when I had my 2008 armada i maybe heard it come on in driving maybe 2-3 times. I have had the q for a year now and ive not heard it during driving, only a few times when starting from a cold start.
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post #8 of 11 Old 11-24-2012, 10:38 PM Thread Starter
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turns out after jumping out of the truck once I heard it cycle on it actually is the rear leveling motor. Problem is it's turning on out of the clear blue while I'm driving or stopped at a light. Taking her in on Monday.

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post #9 of 11 Old 11-25-2012, 02:38 AM
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You might have a leak and it is not holding air if it is turning on often. It should turn on when it sense the air shocks are lower in air then its setting. Mine comes on sporadically also but not often. the reason of it being loud is because the compressor has 4 tiny bushing and they might be worn out. Mine are worn out and its just the little metal tube inside the bushing and its rattling against the bracket.



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post #10 of 11 Old 11-25-2012, 02:48 AM
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if you are in colder temps, then yeah as the air gets colder, its more dense and the bags will sag below the threshold. pump turns on to fill bags back up. its like when the air in your tires goes down a bit when its cold outside.

not much they can do if you are in a really cold climate. could be a leak, sure, but i think its just the outside temps.

and good grief you can hear the pump INSIDE the car?? yikes that sound and the fan in the engine are two distinct sounds.

i had a 2008 and it would do this here and there in the colder winter months. I think all the folks with the air bag suspension system have experienced this.
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