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2015 5.3 low speed/idle whine (video)

BKK

By BKK
in Troubleshooting & Recalls

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BKK Enthusiast

BKK

Posted
Posted

Hello,

 

I just got this truck a couple weeks ago and it has 26k miles. After I installed a catch can the other day I was listening intently for any vacuum leaks and driving without the radio on.

 

I started to notice a distinct “whine” that moves with rpms, is present when idling, and is also noticeable driving at low speeds and light throttle, and especially noticeable in drive throughs and against walls. 
 

it almost sounds like a power steering system that has air in it. Trucks oil psi is good and there are no other issues and truck runs great.

 

I read about an oil pump rasp on start up (which this truck does), but nothing continuous like this one.

I am 90% sure this is a normal noise but with only 2 months left on the Powertrain warranty I want to confirm.

 

 

BKK Enthusiast

BKK

Posted
  • Author
Posted

Here are two more videos...one driving and another at idle when you can kind of hear a “whirring” after the truck is warmed up. Hopefully you guys can hear it.

 

 

 

 

newdude Senior Enthusiast

newdude

Posted
Posted

Normal.  Its definitely not power steering on 1500 trucks as those are electric assist not hydraulic.  

 

Quote

 

#14-06-04-004F: Various Engine Noises During Cold Start and Warm Engine Operation - (Mar 17, 2020)

Oil Pump Cold Start Rrrrp or Rasp

The oil pump design has changed from a gerotor gear type pump to a two-stage vane type pump for fuel economy reasons. At temperatures at or below 0°C (32°F), or when the engine has been sitting for a few hours, it is possible to have air enter the pump through normal oil drain back. Upon startup, the owner may hear a short “Rrrrp” or “Rasp” coming from the front of the engine. It is most often heard during a remote start.

There is nothing wrong with the oil pump or oil system. No repairs should be attempted for this condition.

 

 

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