Loud Whining Noise Upon 1st Starup in the Morning
#1
Loud Whining Noise Upon 1st Startup in the Morning
2007 XK 114,000 miles. Upon first starting the car in the morning I have been hearing a loud whining noise which I believe is attributable to the secondary air induction pump (C2P15958) going bad. Has anyone here had this problem? The noise dissipates quickly and I haven't experienced any drivability issues. Is it necessary to have this fixed? How much do you think it will cost? I've seen the pump offered on line for $318.53 but I have no idea how difficult the labor would be.
Last edited by captusnr; 06-09-2017 at 12:08 PM. Reason: Spelling
#2
I would suspect the hydraulic power steering pump before and vane air pump. The hydraulic pump will whine if it lost it's prime. Turn the steering wheel next time it does it. If the pitch changes or the wheel hesitates then you know your culprit. Even then I wouldn't worry about it until you get drive ability issues. Possibly change the oil etc. before condemning the pump.
Vane air pumps seldom fail in auto applications. Just not enough pressure, dirt or RPM to cause the vanes to wear or fail. You'll typically hear the bearings before anything else. Possibly you have a tensioner that's going out. They can be diagnosed by replicating the fault with the hood open or it's easier to pop the belts and spin each idler to see which is rough of noisy.
Vane air pumps seldom fail in auto applications. Just not enough pressure, dirt or RPM to cause the vanes to wear or fail. You'll typically hear the bearings before anything else. Possibly you have a tensioner that's going out. They can be diagnosed by replicating the fault with the hood open or it's easier to pop the belts and spin each idler to see which is rough of noisy.
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Cheaper than replacing the copilot!
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